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The OP

Published on 2024-10-6 22:27 Only look at the author

【Follow me Season 2 Episode 2】Task Summary of Learning Arduino UNO R4 WiFi [Copy link]

<i class="pstatus">This post was last edited by md-llama-com on 2024-10-20 22:28</i> # Summary of learning Arduino UNO R4 WiFi tasks Follow me Season 2, Episode 2 is here, and I can get free technology and boards again~ Enough of small talk~ Today's task summary, this time it's an Arduino UNO R4 WiFi board, which uses the RA4M1 chip from Renesas Electronics of Japan, and the wifi uses Espressif ESP32, which is a very worthwhile solution to learn. # Summary video link <div id="player_bf33d481ab30092d6d1ba4513cc03fc20" class="localvideo-box"></div><div class="localvideo-title">FM22</div><br/>

# Full bill of materials (including material names and pictures) 1. The main control board Arduino UNO R4 WiFi 
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<p class="xg1 y">2024-10-7 01:12 上传</p>

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 2. LTR-329 ambient light sensor and SHT40 temperature and humidity sensor 
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<p class="xg1 y">2024-10-20 16:26 上传</p>

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 3. Jumper wires 
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<p class="xg1 y">2024-10-20 20:41 上传</p>

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 4. Oscilloscope 
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<p class="xg1 y">2024-10-20 20:43 上传</p>

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 # Getting started (must do): Build the environment and start the first step Blink / Serial port print Hello EEWorld! Matching devices: Arduino UNO R4 WiFi 
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<p class="xg1 y">2024-10-7 01:12 上传</p>

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 This is today's protagonist. This project is to determine the quality of the board and to test whether it can communicate with the computer. ## Build the environment: Download Arduino IDE from the Arduino official website 
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<p class="xg1 y">2024-10-7 09:47 上传</p>

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 Click Microsoft Download or MAC Download 
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<p class="xg1 y">2024-10-7 09:47 上传</p>

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 Download JUST DOWNLOAD After downloading, click the installation package to install 
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<p class="xg1 y">2024-10-7 09:53 上传</p>

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<p class="xg1 y">2024-10-7 09:53 上传</p>

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<p class="xg1 y">2024-10-7 09:54 上传</p>

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 Agree, next, install, three steps, try to install it on the D drive After completing the installation, open the Arduino IDE and authorize a lot of permissions, we entered the interface and started to get the Arduino UNO R4 WiFi package 
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<p class="xg1 y">2024-10-7 10:40 上传</p>

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 Note that the Arduino IDE will require a lot of things to be installed 
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<p class="xg1 y">2024-10-7 10:35 上传</p>

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 After installing the support package for this board, the environment setup is completed. The whole step is: go to the official website -> download the software -> install Arduino -> configure the Arduino UNO R4 WiFi board expansion package## Blink The first sentence of writing a program is to print hello world. The first step of playing with the development board is to turn on the light. After opening the IDE, find the file file->Exmples->Basics->BLink 
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<p class="xg1 y">2024-10-7 10:50 上传</p>

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 Connect the board to the computer with a Type-C cable and click compile. The effect is as follows: 
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<p class="xg1 y">2024-10-7 12:51 上传</p>

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 The code is as follows: ``` void setup() { // initialize digital pin LED_BUILTIN as an output. pinMode(LED_BUILTIN, OUTPUT); } // the loop function runs over and over again forever void loop() { digitalWrite(LED_BUILTIN, HIGH); // turn the LED on (HIGH is the voltage level) delay(1000); // wait for a second digitalWrite(LED_BUILTIN, LOW); // turn the LED off by making the voltage LOW delay(1000); // wait for a second } ``` ## Serial port prints Hello EEWorld! Serial port printing is the basis of many interactions. We add this line under the lighting program just now: The baud rate is set to 9600. The baud rate is the communication frequency between the computer and the microcontroller. ``` Serial.println("Hello EEWorld!"); ``` Open the serial port debugger and download the program. The effect is as follows: 
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<p class="xg1 y">2024-10-7 13:43 上传</p>

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 The code is as follows: ``` void setup() { // initialize digital pin LED_BUILTIN as an output. pinMode(LED_BUILTIN, OUTPUT); Serial.begin(9600); } // the loop function runs over and over again forever void loop() { digitalWrite(LED_BUILTIN, HIGH); // turn the LED on (HIGH is the voltage level) delay(1000); // wait for a second Serial.println("Hello EEWorld!"); digitalWrite(LED_BUILTIN, LOW); // turn the LED off by making the voltage LOW delay(1000); // wait for a second } ``` ## Program flow chart
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<p class="xg1 y">2024-10-20 20:54 上传</p>

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 # Basic tasks (required): drive 12x8 dot matrix LED; use DAC to generate sine wave; use OPAMP to amplify DAC signal; use ADC to collect and print data to serial port and other interfaces, which can be uploaded to the host computer to display the curve. Matching devices: Arduino UNO R4 WiFi ## Drive 12x8 dot matrix LED 12X8 dot matrix LED This is something I have never encountered before. By looking at the schematic diagram, the schematic diagram is as follows
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<p class="xg1 y">2024-10-7 13:46 上传</p>

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 As for how to drive this LED screen, we can find LED_Matrix in the example, open the DisplaySingleFrame example to view the code as follows``` #include "Arduino_LED_Matrix.h" // Include the LED_Matrix library #include "frames.h" // Include a header file containing some custom icons ArduinoLEDMatrix matrix; // Create an instance of the ArduinoLEDMatrix class void setup() { Serial.begin(115200); // Initialize serial communication at a baud rate of 115200 matrix.begin(); // Initialize the LED matrix } void loop() { // Load and display the "chip" frame on the LED matrix matrix.loadFrame(chip); delay(500); // Pause for 500 milliseconds (half a second) // Load and display the "danger" frame on the LED matrix matrix.loadFrame(danger); delay(500); // Load and display the "happy" frame on the LED matrix matrix.loadFrame(happy); delay(500); // Load and display the "big heart" frame provided by the library matrix.loadFrame(LEDMATRIX_HEART_BIG); delay(500); // Turn off the display matrix.clear(); delay(1000); // Print the current value of millis() to the serial monitor Serial.println(millis()); } ``` The effect is as follows: [attach] 853219[/attach] ## The program flow chart is as follows: 
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<img id="aimg_853223" style="cursor:pointer;" aid="853223" src="static/image/common/none.gif" zoomfile="data/attachment/forum/202410/20/210745lr21e1o2ej52e5rx.png" file="data/attachment/forum/202410/20/210745lr21e1o2ej52e5rx.png" class="zoom" onclick="zoom(this, this.src, 0, 0, 0)" width="370" id="aimg_853223" inpost="1" onmouseover="showMenu({'ctrlid':this.id,'pos':'12'})" />

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 ## Use DAC to generate sine wave; use OPAMP to amplify DAC signal; use ADC to collect and print data to serial port. These three tasks can be done together. ### Use DAC to generate sine wave. Open the case library SineWave. The code is as follows: ``` #include "analogWave .h" // Include the library for analog waveform generation analogWave wave(DAC); // Create an instance of the analogWave class, using the DAC pin int freq = 10; // in hertz, change accordingly void setup(){ Serial .begin(115200); wave.sine(freq); wave.amplitude(0.5);//amplitude multiple} void loop(){ Serial.println(analogRead(A5)); delay(10); } ``` 
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<p class="xg1 y">2024-10-7 15:28 上传</p>

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 ### Amplifying DAC Signals with OPAMPs Using operational amplifiers (OP-AMPs) to amplify the signals of digital-to-analog converters (DACs) is a common electronic circuit design practice. This configuration can increase the amplitude of the signal to meet specific application needs, such as driving larger loads or providing sufficient signal strength for measurement. The following is the circuit diagram 
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 The code is as follows: ``` #include "analogWave.h" // Include the library for analog waveform generation #include "OPAMP.h" analogWave wave(DAC); // Create an instance of the analogWave class, using the DAC pin int freq = 200; // in hertz, change accordingly void setup() { Serial.begin(2000000); // Initialize serial communication at a baud rate of 115200 analogReadResolution(14); wave.sine(freq); // Generate a sine wave with the initial frequency wave.amplitude(0.5);//amplitude multiple OPAMP.begin(OPAMP_SPEED_HIGHSPEED); } void loop() { delayMicroseconds(100); } `` ` ### To collect and print data to the serial port using ADC, you only need to import the output into A4 and A5 ports respectively. The loop is as follows``` void loop() { Serial.print(analogRead(A4)); Serial.print(","); Serial.println(analogRead(A5)); delayMicroseconds(100); } ``` The oscilloscope shows the following [attach]853224 [/attach] ## Flowchart [attach]853225 [/attach] # Advanced task (must be done): Use MQTT protocol to access the open source smart home platform HA (HomeAssistant) via Wi-Fi. Devices: Arduino UNO To connect R4 WiFi to the HA (HomeAssistant) platform, you first need an HA platform. The usual practice is to build a server and install HA in the server using a docker container. As a beginner, we directly install HA on our own computer using pip3 install homeassistant Enter the command in PowerShell to download and install HA. It will take a long time to open 127.0.0.1:8123 to register HA Next, we need to build an MQTT server. Here we use the EMQX image under the Docker container. As we all know, Docker installation is really annoying. I encountered Docker Engine stopped here. **How did I solve it** ### 1. First check Check if the CPU virtualization is enabled 
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<p class="xg1 y">2024-10-19 17:19 上传</p>

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 If virtualization is disabled, enter the BIOS to enable virtualization. I have no problem here. ### 2. Start the Docker Desktop Service in Windows PowerShell ( Administrator run), enter **net start com.docker.service** to start the Docker Desktop Service service 
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<p class="xg1 y">2024-10-19 17:23 上传</p>

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 ### 3.WSL installation in Windows PowerShell Enter **wsl --update** , start installing wsl or a newer version. ### 4. Start docker daemon Enter ** cd "C:\Program Files\Docker\Docker" ** in windows powershell Jump to the Docker Desktop installation path and run the command **.\ DockerCli.exe -SwitchDaemon** Start docker daemon### 5. Restart the computer Restarting the computer is very important. The steps on the Internet did not mention this step, which caused me to fail. After restarting the computer, run docker desktop and you can enter normally. After entering docker normally, find Docker Engine and change the content to ``` { "builder": { "gc": { "defaultKeepStorage": "20GB", "enabled": true } }, "debug": true, "experimental": false, "insecure-registries":[], "registry-mirrors":[ "https://docker.m.daocloud.io" ] } ``` Restart docker. ## Then you can pull emqx in docker ### 1. Enter the following command in the windows command line to search for the image, ```c docker search emqx ``` 
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<p class="xg1 y">2024-10-19 17:38 上传</p>

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 ### 2. After pressing Enter, you can see that emqx ranks first and is official; Enter the following command to pull the latest version of the image```c docker pull emqx ``` 
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 ## Then create an EMQX container``` docker run -d --name="EMQX_container" -v D:/HassWP_2024.4.3/EMQX -p 1883:1883 -p 8083:8083 -p 8883:8883 -p 8084:8084 -p 18083:18083 emqx ``` -v Followed by the container save path [attach] 853018 [/attach] ## Start emqx Go back to docker and click the icon URL to start [attach] 853019 [/attach] http://localhost:18083/ Default account: admin Default password: public ## Some settings of EMQX After entering EMQX, we will be asked to reset the password Access control -> Client authentication -> Select **Create** -> Select **Password-Based** -> **Built-in database** -> **Next** -> All 3 are default -> Click **Create** Click **User Management** -> Click + (right) -> Fill in the new username and password ## EMQX is connected to HA First, find the address of the EMQX server in docker, and find it as shown in the picture [attach] 853054 [/attach] Open the settings in HA as shown below [attach] 853056 [/attach] Devices and Services [attach] 853057 [/attach] Add a new device 
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<p class="xg1 y">2024-10-19 22:03 上传</p>

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 Enter the address just now and the newly added username and password on EMQX. After completion, return to the EMQX interface and you can see that the number of device connections has increased by one 
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. In this way, EMQX HA is connected. Next, we need to open the connection between our protagonist and EMQX. ## The program for connecting Arduino UNO R4 WiFi to EMQX is as follows: The parameter definitions are as follows```c #define MQTT_SERVER "192.168.3.28" // Computer wireless network card IP address "xxx.xxx.xxx.xxX #define MQTT_PORT 1883 // Define the port of the MQTT server #define MQTT_CLIENT_ID "arduino" // Define the client ID 'arduino' #define MQTT_USERNAME "sdfa" // Define the username, EMQX defines "admin' #define MQTT_PASSWORD "sdfda" // Define the password, EMQX defines "admin" #define TOPIC_SUBSCRIBE "UNO/arduino/switch/cmd_t" // Define the subscribed topic #define SECRET_SSID "dsdfai" // Router WiFi name can also use win mobile hotspot "xxXXX #define SECRET_PASS "sfdfsf" //Router WiFi password" xxxXX ``` The main program is to set the button on the HA website, and then control the light of pin 14 on the Arduino UNO R4 WiFi to turn on and off. The main program is as follows```c #include "ArduinoHA.h" #include "OPAMP.h" #include "Wire.h" #include "WiFiS3.h" #include "arduino_secrets.h" #include "analogWave.h" analogWave wave(DAC); int status= WL_IDLE_STATUS; unsigned long lastUpdateAt=0; int freg=1;//max200 Hz limit by serial print WiFiClient client; HADevice device(MQTT_CLIENT_ID);//HADevice device (mac, sizeof(mac)); HAMqtt mqtt(client,device); HAButton buttonON("myButtonON"); HAButton buttonOFF("myButtonOFF"); void setup() { pinMode(LED_BUILTIN, OUTPUT); Serial.begin(115200); wifi_and_mqtt_init(); analogReadResolution(14);//change to 14-bit resolution wave.sine(freg);//wave.saw(freg); wave.amplitude(0.5); OPAMP.begin(OPAMP_SPEED_HIGHSPEED); device.setName("Arduino"); device.setSoftwareVersion("1.0.0"); buttonON.setIcon("mdi:fire"); buttonON.setName("Click me ON"); buttonOFF.setIcon("mdi:home"); buttonOFF.setName("click me OFF "); buttonON.onCommand(onButtonCommand);//press callbacks buttonOFF.onCommand(onButtonCommand); } void loop() { mqtt.loop(); if((millis() - lastUpdateAt) > 1000) {//update in 1s interval unsigned long uptimeValue=millis()/1000; lastUpdateAt =millis(); } } void onMqttMessage(const char* topic, const uint8_t* payload, uint16_t length) { char message[length]; memcpy(message,payload,length ); message[length]= '\0'; Serial.print("dbglNew message on topic:"); Serial.println(topic); Serial.print("Data:"); Serial.println((const char*)message); if(strstr(message,"on ")!=NULL) { int dutyCycle=0; if (sscanf(message,"on#%d",&dutyCycle)==1) { } } else if(strstr(message,"off")!=NULL) { } else { Serial.println("Unrecognized message"); } memset(message,0, length); } void onMqttConnected() { Serial.println("Connected to the broker!"); //You can subscribe to custom topic if you need mqtt.subscribe(TOPIC_SUBSCRIBE);//command //mqtt.subscribe(TOPIC SUBSCRIBE2)://status Serial.println("subscribed to topic:" TOPIC_SUBSCRIBE); mqtt.publish(TOPIC_SUBSCRIBE,"Hi EMOX I'mArdinO UNO R4 WIFI^^"); } void onMqttDisconnected() { Serial.println("Disconnected from the broker!" ); } void onMqttStateChanged(HAMqtt::ConnectionState state) { Serial.print("MoTT state changed to:"); Serial.println(static_castsubscribe(TOPIC_SUBSCRIBE);//command //mqtt.subscribe(TOPIC SUBSCRIBE2)://status Serial.println("subscribed to topic:" TOPIC_SUBSCRIBE); mqtt.publish(TOPIC_SUBSCRIBE,"Hi EMOX I'mArdinO UNO R4 WIFI^ ^"); } void onMqttDisconnected() { Serial.println("Disconnected from the broker!"); } void onMqttStateChanged(HAMqtt::ConnectionState state) { Serial.print("MoTT state changed to:"); Serial.println (static_castsubscribe(TOPIC_SUBSCRIBE);//command //mqtt.subscribe(TOPIC SUBSCRIBE2)://status Serial.println("subscribed to topic:" TOPIC_SUBSCRIBE); mqtt.publish(TOPIC_SUBSCRIBE,"Hi EMOX I'mArdinO UNO R4 WIFI^ ^"); } void onMqttDisconnected() { Serial.println("Disconnected from the broker!"); } void onMqttStateChanged(HAMqtt::ConnectionState state) { Serial.print("MoTT state changed to:"); Serial.println (static_cast<int8_t>(state)); } void onButtonCommand(HAButton* sender) { if(sender ==&buttonON) { Serial.print("[dbg]buttonON");// button A was clicked, do your logic hereelse digitalWrite(LED_BUILTIN, HIGH ); } else if(sender==&buttonOFF) { Serial.print("[dbg]buttonOFF");// button B was clicked, do your logic here digitalWrite(LED_BUILTIN, LOW); } } void wifi_and_mqtt_init() { / /check for the WiFi module: if(WiFi.status()==WL_NO_MODULE) { Serial.println("Communication with WiFi module failed!"); while (true); } String fv = WiFi.firmwareVersion(); if( fv < WIFI_FIRMWARE_LATEST_VERSION) { Serial.println("Please upgrade the firmware"); } //attempt to connect to WiFi network; while(status!=WL_CONNECTED) { Serial.print("Attempting to connect to SSID:"); Serial.println(SECRET_SSID); //Connect to WPA/ WPA2 network, Change this line if using open or WEP network; status=WiFi.begin(SECRET_SSID,SECRET_PASS); delay(10000); } Serial.println("\nStarting connection to MoTT server..."); mqtt.onMessage (onMqttMessage); mqtt.onConnected(onMqttConnected); mqtt.onDisconnected(onMqttDisconnected); mqtt.onStateChanged(onMqttStateChanged); //If you want to change prefix only for non-discovery prefix: mqtt.setDataPrefix("UNO"); if(!mqtt.begin(MQTT_SERVER,MQTT_PORT,MQTT_USERNAME,MQTT_PASSWORD)) { Serial.print("Failed, rC="); Serial.print(mqtt.getState()); //0btaining state of the MoTr connection: Serial .println("try again in 5 seconds"); delay(5000); } } ``` The effect is as follows
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<p class="xg1 y">2024-10-20 11:49 上传</p>

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 ## Flowchart
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<img id="aimg_853229" style="cursor:pointer;" aid="853229" src="static/image/common/none.gif" zoomfile="data/attachment/forum/202410/20/212103qayaobwkqoonda9t.png" file="data/attachment/forum/202410/20/212103qayaobwkqoonda9t.png" class="zoom" onclick="zoom(this, this.src, 0, 0, 0)" width="697" id="aimg_853229" inpost="1" onmouseover="showMenu({'ctrlid':this.id,'pos':'12'})" />

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<p class="xg1 y">2024-10-20 21:21 上传</p>

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 [attach]853230[/attach ] # Extended tasks (must do, choose one of the two, or customize tasks of similar or higher difficulty according to your own interests and complete them) I choose to do both## ■ Extended task 1: Through the external LTR-329 environment Light sensor, uploads light intensity to HA, displays data through HA panel. Matching device: Arduino UNO R4 WiFi, 5591 (LTR-329 light sensor expansion board), jumper First, we need to deal with the wiring problem. Because we did not buy the official jumper, we need to solder the pins ourselves as shown below 
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<img style="cursor:pointer;" id="aimg_853163" aid="853163" src="static/image/common/none.gif" onclick="zoom(this, this.getAttribute('zoomfile'), 0, 0, '0')" zoomfile="data/attachment/forum/202410/20/162626fejxqxx11laa4sbr.jpg" file="data/attachment/forum/202410/20/162626fejxqxx11laa4sbr.jpg" inpost="1" onmouseover="showMenu({'ctrlid':this.id,'pos':'12'})" />

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<p class="xg1 y">2024-10-20 16:26 上传</p>

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 and then follow According to IIC requirements, connect the clock line and data line, and pay attention to the power line to 3.3V. 
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<img style="cursor:pointer;" id="aimg_853164" aid="853164" src="static/image/common/none.gif" onclick="zoom(this, this.getAttribute('zoomfile'), 0, 0, '0')" zoomfile="data/attachment/forum/202410/20/162742snamis5j16iusj52.png" file="data/attachment/forum/202410/20/162742snamis5j16iusj52.png" inpost="1" onmouseover="showMenu({'ctrlid':this.id,'pos':'12'})" />

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<p class="xg1 y">2024-10-20 16:27 上传</p>

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<img style="cursor:pointer;" id="aimg_853165" aid="853165" src="static/image/common/none.gif" onclick="zoom(this, this.getAttribute('zoomfile'), 0, 0, '0')" zoomfile="data/attachment/forum/202410/20/162743gh5ftbh28uc8q5zc.jpg" file="data/attachment/forum/202410/20/162743gh5ftbh28uc8q5zc.jpg" inpost="1" onmouseover="showMenu({'ctrlid':this.id,'pos':'12'})" />

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<p class="xg1 y">2024-10-20 16:27 上传</p>

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 Install the Adafruit LTR329 and LTR303 library and open the example. Simplify the useless statements and test whether the module is working properly before connecting to HA: ``` # include "Adafruit_LTR329_LTR303.h" Adafruit_LTR303 ltr = Adafruit_LTR303(); void setup() { Serial.begin(115200); if ( ! ltr.begin() ) { Serial.println("Couldn't find LTR sensor!"); while (1) delay(10); } //Initialize the sensor. If not found, continue refreshing until found Serial.println("Found LTR sensor!"); ltr.setGain(LTR3XX_GAIN_96);//Set sensor sensitivity ltr.setIntegrationTime(LTR3XX_INTEGTIME_100);//Set sensor integration time in ms ltr.setMeasurementRate(LTR3XX_MEASRATE_200);//Set measurement rate in ms // The LTR-303 has interrupt output support , we can enable the pin output! ltr.enableInterrupt(true); // The INT pin also has a polarity setting. For active LOW set to 'false', // for active HIGH set to 'true' ltr.setInterruptPolarity(false ); //Set low and high thresholds// Then set the low threshold (values BELOW this trigger an interrupt) ltr.setLowThreshold(2000); // and set the high threshold (values ABOVE this trigger an interrupt) ltr.setHighThreshold(30000); Serial.print("Thresholds: "); Serial.print(ltr.getLowThreshold()); Serial. print(" & "); Serial.println(ltr.getHighThreshold()); // Finally, default is an interrupt on every value that is under/over the // threshold ranges. However, you're more likely to get spurious IRQs, so // we can set it to require "N counts in a row" before an IRQ. 1 count is // IRQ for each reading, 2 count means we need two outside readings in a row, etc // up to 16 . //Set the continuous count of interrupts. If the threshold is exceeded 4 times in a row, the interrupt will be interrupted. ltr.setIntPersistance(4); Serial.print("Consecutive counts for IRQ: "); Serial.println(ltr.getIntPersistance()); } void loop() { bool valid; uint16_t visible_plus_ir, infrared; //Check if new data is available if (ltr.newDataAvailable()) { valid = ltr.readBothChannels(visible_plus_ir , infrared); //If the data is valid, print the light intensity values of visible light + infrared and infrared to the serial monitor. if (valid) { Serial.print("CH0 Visible + IR: "); Serial.print(visible_plus_ir); Serial.print("\t\tCH1 Infrared: "); Serial.println(infrared); } } delay( 100); } ``` The running effect is as follows 
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<img id="aimg_853228" style="cursor:pointer;" aid="853228" src="static/image/common/none.gif" zoomfile="data/attachment/forum/202410/20/211738uhknnfx74uspnse6.gif" file="data/attachment/forum/202410/20/211738uhknnfx74uspnse6.gif" class="zoom" onclick="zoom(this, this.src, 0, 0, 0)" width="280" id="aimg_853228" inpost="1" onmouseover="showMenu({'ctrlid':this.id,'pos':'12'})" />

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<p class="xg1 y">2024-10-20 21:17 上传</p>

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 The program combined with HA is as follows``` #include "ArduinoHA.h" #include "OPAMP.h" #include "Wire.h" #include " WiFiS3.h" #include "arduino_secrets.h" #include "analogWave.h" #include "Adafruit_LTR329_LTR303.h" analogWave wave(DAC); Adafruit_LTR303 ltr = Adafruit_LTR303(); int status= WL_IDLE_STATUS; unsigned long lastUpdateAt=0; int freg=1;//max200 Hz limit by serial print WiFiClient client; HADevice device(MQTT_CLIENT_ID);//HADevice device (mac, sizeof(mac)); HAMqtt mqtt(client,device); HASensorNumber analogSensor("myAnalogInput", HASensorNumber ::PrecisionP1); HASensorNumber uptimeSensor("myUptime"); HAButton buttonON("myButtonON"); HAButton buttonOFF("myButtonOFF"); void setup() { pinMode(LED_BUILTIN, OUTPUT); Serial.begin(115200); wifi_and_mqtt_init( ); analogReadResolution(14);//change to 14-bit resolution wave.sine(freg);//wave.saw(freg); wave.amplitude(0.5); OPAMP.begin(OPAMP_SPEED_HIGHSPEED); device.setName("Arduino"); device.setSoftwareVersion("1.0.0"); buttonON.setIcon("mdi:fire"); buttonON.setName("Click me ON"); buttonOFF .setIcon("mdi:home"); buttonOFF.setName("click me OFF"); buttonON.onCommand(onButtonCommand);//press callbacks buttonOFF.onCommand(onButtonCommand); if ( ! ltr.begin() ) { Serial .println("Couldn't find LTR sensor!"); while (1) delay(10); } //Initialize the sensor. If not found, continue to refresh until found Serial.println("Found LTR sensor!"); ltr.setGain(LTR3XX_GAIN_96);//Set sensor sensitivity ltr.setIntegrationTime(LTR3XX_INTEGTIME_100);//Set sensor integration time ms ltr.setMeasurementRate(LTR3XX_MEASRATE_200); //Set the measurement rate in ms // The LTR-303 has interrupt output support, we can enable the pin output! ltr.enableInterrupt(true); // The INT pin also has a polarity setting. For active LOW set to 'false', // for active HIGH set to 'true' ltr.setInterruptPolarity(false); //Set the low and high thresholds// Then set the low threshold (values BELOW this trigger an interrupt) ltr.setLowThreshold(2000); // and set the high threshold (values ABOVE this trigger an interrupt) ltr.setHighThreshold(30000); } void loop() { bool valid; uint16_t visible_plus_ir, infrared; mqtt.loop(); //Check if new data is available if (ltr.newDataAvailable()) { valid = ltr.readBothChannels(visible_plus_ir, infrared); //If the data is valid, print the light intensity values of visible+infrared and infrared to the serial monitor. if (valid) { if((millis() - lastUpdateAt) > 1000) {//update in 1s interval Serial.print("CH0 Visible + IR: "); Serial.print(visible_plus_ir); uptimeSensor.setValue(visible_plus_ir); Serial.print("\t\tCH1 Infrared: "); Serial.println(infrared); analogSensor.setValue( infrared); lastUpdateAt =millis(); } } } } void onMqttMessage(const char* topic, const uint8_t* payload, uint16_t length) { char message[length]; memcpy(message,payload,length); message[length]= '\0'; Serial.print("dbglNew message on topic:"); Serial.println(topic); Serial.print( "Data:"); Serial.println((const char*)message); void onMqttConnected() { Serial.println("Connected to the broker!"); //You can subscribe to custom topic if you need mqtt.subscribe(TOPIC_SUBSCRIBE);//command //mqtt.subscribe(TOPIC SUBSCRIBE2)://status Serial.println("subscribed to topic:" TOPIC_SUBSCRIBE); (TOPIC_SUBSCRIBE,"Hi EMOX I'mArdinO UNO R4 WIFI^^"); } void onMqttDisconnected() { Serial.println("Disconnected from the broker!"); } void onMqttStateChanged(HAMqtt::ConnectionState state) { Serial.print("MoTT state changed to:"); Serial.println(static_castsetValue(visible_plus_ir); Serial.print("\t\tCH1 Infrared: "); Serial.println(infrared); analogSensor.setValue(infrared); lastUpdateAt =millis(); } } } } void onMqttMessage(const char* topic , const uint8_t* payload, uint16_t length) { char message[length]; memcpy(message,payload,length); message[length]= '\0'; Serial.print("dbglNew message on topic:"); Serial. println(topic); Serial.print("Data:"); Serial.println((const char*)message); void onMqttConnected() { Serial.println("Connected to the broker!"); //You can subscribe to custom topic if you need mqtt.subscribe(TOPIC_SUBSCRIBE);//command //mqtt.subscribe(TOPIC SUBSCRIBE2)://status Serial.println("subscribed to topic:" TOPIC_SUBSCRIBE); mqtt.publish(TOPIC_SUBSCRIBE,"Hi EMOX I'mArdinO UNO R4 WIFI^^"); } void onMqttDisconnected( ) { Serial.println("Disconnected from the broker!"); } void onMqttStateChanged(HAMqtt::ConnectionState state) { Serial.print("MoTT state changed to:"); Serial.println(static_castsetValue(visible_plus_ir); Serial.print("\t\tCH1 Infrared: "); Serial.println(infrared); analogSensor.setValue(infrared); lastUpdateAt =millis(); } } } } void onMqttMessage(const char* topic , const uint8_t* payload, uint16_t length) { char message[length]; memcpy(message,payload,length); message[length]= '\0'; Serial.print("dbglNew message on topic:"); Serial. println(topic); Serial.print("Data:"); Serial.println((const char*)message); void onMqttConnected() { Serial.println("Connected to the broker!"); //You can subscribe to custom topic if you need mqtt.subscribe(TOPIC_SUBSCRIBE);//command //mqtt.subscribe(TOPIC SUBSCRIBE2)://status Serial.println("subscribed to topic:" TOPIC_SUBSCRIBE); mqtt.publish(TOPIC_SUBSCRIBE,"Hi EMOX I'mArdinO UNO R4 WIFI^^"); } void onMqttDisconnected( ) { Serial.println("Disconnected from the broker!"); } void onMqttStateChanged(HAMqtt::ConnectionState state) { Serial.print("MoTT state changed to:"); Serial.println(static_cast<int8_t>(state)); } void onButtonCommand(HAButton* sender) { if(sender ==&buttonON) { Serial.print("[dbg]buttonON");// button A was clicked, do your logic hereelse digitalWrite(LED_BUILTIN, HIGH ); } else if(sender==&buttonOFF) { Serial.print("[dbg]buttonOFF");// button B was clicked, do your logic here digitalWrite(LED_BUILTIN, LOW); } } void wifi_and_mqtt_init() { / /check for the WiFi module: if(WiFi.status()==WL_NO_MODULE) { Serial.println("Communication with WiFi module failed!"); while (true); } String fv = WiFi.firmwareVersion(); if( fv < WIFI_FIRMWARE_LATEST_VERSION) { Serial.println("Please upgrade the firmware"); } //attempt to connect to WiFi network; while(status!=WL_CONNECTED) { Serial.print("Attempting to connect to SSID:"); Serial.println(SECRET_SSID); //Connect to WPA/ WPA2 network, Change this line if using open or WEP network; status=WiFi.begin(SECRET_SSID,SECRET_PASS); delay(10000); } Serial.println("\nStarting connection to MoTT server..."); mqtt.onMessage (onMqttMessage); mqtt.onConnected(onMqttConnected); mqtt.onDisconnected(onMqttDisconnected); mqtt.onStateChanged(onMqttStateChanged); //If you want to change prefix only for non-discovery prefix: mqtt.setDataPrefix("UNO"); if(!mqtt.begin(MQTT_SERVER,MQTT_PORT,MQTT_USERNAME,MQTT_PASSWORD)) { Serial.print("Failed, rC="); Serial.print(mqtt.getState()); //0btaining state of the MoTr connection: Serial .println("tryagain in 5 seconds"); delay(5000); } } ``` The running effect is as follows
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<img id="aimg_853227" style="cursor:pointer;" aid="853227" src="static/image/common/none.gif" zoomfile="data/attachment/forum/202410/20/211627kr8a77kkk3a9vib3.gif" file="data/attachment/forum/202410/20/211627kr8a77kkk3a9vib3.gif" class="zoom" onclick="zoom(this, this.src, 0, 0, 0)" width="280" id="aimg_853227" inpost="1" onmouseover="showMenu({'ctrlid':this.id,'pos':'12'})" />

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<p class="xg1 y">2024-10-20 21:16 上传</p>

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 ### Flowchart
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<img id="aimg_853236" style="cursor:pointer;" aid="853236" src="static/image/common/none.gif" zoomfile="data/attachment/forum/202410/20/212505jk121mw1iv37ww33.png" file="data/attachment/forum/202410/20/212505jk121mw1iv37ww33.png" class="zoom" onclick="zoom(this, this.src, 0, 0, 0)" width="604" id="aimg_853236" inpost="1" onmouseover="showMenu({'ctrlid':this.id,'pos':'12'})" />

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<p class="xg1 y">2024-10-20 21:25 上传</p>

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 [attach]853237[ /attach] 
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<img style="cursor:pointer;" id="aimg_853238" aid="853238" src="static/image/common/none.gif" onclick="zoom(this, this.getAttribute('zoomfile'), 0, 0, '0')" zoomfile="data/attachment/forum/202410/20/212505dofi59os228jmoal.png" file="data/attachment/forum/202410/20/212505dofi59os228jmoal.png" inpost="1" onmouseover="showMenu({'ctrlid':this.id,'pos':'12'})" />

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<p class="xg1 y">2024-10-20 21:25 上传</p>

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 ## ■ Extension Task 2: Upload temperature and humidity to HA through an external SHT40 temperature and humidity sensor, and display the data through the HA panel. Matching device: Arduino UNO R4 WiFi, 4885 (SHT40 temperature and humidity sensor expansion board), jumper [attach] 853163 [/attach] Install the Adafruit SHT4X library. Same as the light sensor, solder the pins, and use the program to test the temperature and humidity sensor. The program is as follows: `` #include "ArduinoHA.h" #include "OPAMP.h" #include "Wire.h" #include "WiFiS3.h" #include "arduino_secrets.h" #include "analogWave.h" #include "Adafruit_LTR329_LTR303.h " #include "Adafruit_SHT4x.h" Adafruit_SHT4x sht4 = Adafruit_SHT4x(); analogWave wave(DAC); Adafruit_LTR303 ltr = Adafruit_LTR303(); int status= WL_IDLE_STATUS; unsigned long lastUpdateAt=0; int freg=1;//max200 Hz limit by serial print WiFiClient client; HADevice device(MQTT_CLIENT_ID);//HADevice device (mac, sizeof(mac)); HAMqtt mqtt(client,device); HASensorNumber humidity2("myhumidity"); HASensorNumber Temperature2("Temperature"); HAButton buttonON("myButtonON"); HAButton buttonOFF("myButtonOFF"); void setup() { pinMode(LED_BUILTIN, OUTPUT); Serial.begin(115200); wifi_and_mqtt_init(); analogReadResolution(14 );//change to 14-bit resolution wave.sine(freg);//wave.saw(freg); wave.amplitude(0.5); OPAMP.begin(OPAMP_SPEED_HIGHSPEED); device.setName("Arduino"); device.setSoftwareVersion("1.0.0"); buttonON.setIcon("mdi:fire"); buttonON.setName("Click me ON"); buttonOFF.setIcon("mdi:home"); buttonOFF.setName("click me OFF "); buttonON.onCommand(onButtonCommand);//press callbacks buttonOFF.onCommand(onButtonCommand); while (!Serial) delay(10); // will pause Zero, Leonardo, etc until serial console opens if (! sht4.begin ()) { Serial.println("Couldn't find SHT4x"); while (1) delay(1); } Serial.println(sht4.readSerial(), HEX); // You can have 3 different precisions, higher precision takes longer sht4.setPrecision(SHT4X_HIGH_PRECISION); //Precision// You can have 6 different heater settings // higher heat and longer times uses more power // and reads will take longer too! sht4.setHeater(SHT4X_NO_HEATER);//heating sensor} void loop() { bool valid; uint16_t visible_plus_ir, infrared; sensors_event_t humidity, temp; sht4.getEvent(&humidity, &temp);// populate temp and humidity objects with fresh data Serial.print("Temperature: "); Serial.print(temp.temperature); Serial.println(" degrees C"); Serial.print("Humidity: "); Serial.print(humidity. relative_humidity); Serial.println("% rH"); mqtt.loop(); //Check if new data is available if (sht4.getEvent(&humidity, &temp)) { if((millis() - lastUpdateAt) > 1000) {//update in 1s interval Temperature2.setValue(temp.temperature); humidity2.setValue(humidity.relative_humidity); lastUpdateAt =millis(); } } } void onMqttMessage(const char* topic, const uint8_t* payload, uint16_t length) { char message[length]; memcpy(message,payload,length); message[length]= '\0'; Serial.print("dbglNew message on topic:"); Serial.println(topic); Serial.print("Data:"); Serial.println((const char*)message ); if(strstr(message,"on")!=NULL) { int dutyCycle=0; if (sscanf(message,"on#%d",&dutyCycle)==1) { } } else if(strstr(message ,"off")!=NULL) { } else { Serial.println("Unrecognized message"); } memset(message,0, length); } void onMqttConnected() { Serial.println("Connected to the broker!"); //You can subscribe to custom topic if you need mqtt.subscribe(TOPIC_SUBSCRIBE);//command / /mqtt.subscribe(TOPIC SUBSCRIBE2)://status Serial.println("subscribed to topic:" TOPIC_SUBSCRIBE); mqtt.publish(TOPIC_SUBSCRIBE,"Hi EMOX I'mArdinO UNO R4 WIFI^^"); } void onMqttDisconnected() { Serial.println("Disconnected from the broker!"); } void onMqttStateChanged(HAMqtt::ConnectionState state) { Serial.print("MoTT state changed to:"); Serial.println(static_castsetName("click me OFF"); buttonON.onCommand(onButtonCommand);//press callbacks buttonOFF.onCommand(onButtonCommand); while (!Serial) delay(10); // will pause Zero, Leonardo, etc until serial console opens if (! sht4.begin()) { Serial.println("Couldn't find SHT4x"); while (1) delay(1); } Serial.println(sht4.readSerial(), HEX); // You can have 3 different precisions, higher precision takes longer sht4.setPrecision(SHT4X_HIGH_PRECISION); //Precision// You can have 6 different heater settings // higher heat and longer times uses more power // and reads will take longer too! sht4.setHeater (SHT4X_NO_HEATER);//Heating sensor} void loop() { bool valid; uint16_t visible_plus_ir, infrared; sensors_event_t humidity, temp; sht4.getEvent(&humidity, &temp);// populate temp and humidity objects with fresh data Serial.print("Temperature: "); Serial.print(temp.temperature); Serial.println(" degrees C "); Serial.print("Humidity: "); Serial.print(humidity.relative_humidity); Serial.println("% rH"); mqtt.loop(); //Check if new data is available if (sht4 .getEvent(&humidity, &temp)) { if((millis() - lastUpdateAt) > 1000) {//update in 1s interval Temperature2.setValue(temp.temperature); humidity2.setValue(humidity.relative_humidity); lastUpdateAt =millis( ); } } } void onMqttMessage(const char* topic, const uint8_t* payload, uint16_t length) { char message[length]; memcpy(message,payload,length); message[length]= '\0'; Serial.print("dbglNew message on topic:"); Serial.println(topic); Serial.print( "Data:"); Serial.println((const char*)message); if(strstr(message,"on")!=NULL) { int dutyCycle=0; if (sscanf(message,"on#%d" ,&dutyCycle)==1) { } } else if(strstr(message,"off")!=NULL) { } else { Serial.println("Unrecognized message"); } memset(message,0, length); } void onMqttConnected() { Serial.println("Connected to the broker!"); //You can subscribe to custom topic if you need mqtt.subscribe(TOPIC_SUBSCRIBE);//command //mqtt.subscribe(TOPIC SUBSCRIBE2)://status Serial.println("subscribed to topic:" TOPIC_SUBSCRIBE); mqtt.publish(TOPIC_SUBSCRIBE,"Hi EMOX I'mArdinO UNO R4 WIFI^^"); } void onMqttDisconnected() { Serial.println("Disconnected from the broker!"); } void onMqttStateChanged(HAMqtt::ConnectionState state) { Serial.print("MoTT state changed to:"); Serial .println(static_castsetName("click me OFF"); buttonON.onCommand(onButtonCommand);//press callbacks buttonOFF.onCommand(onButtonCommand); while (!Serial) delay(10); // will pause Zero, Leonardo, etc until serial console opens if (! sht4.begin()) { Serial.println("Couldn't find SHT4x"); while (1) delay(1); } Serial.println(sht4.readSerial(), HEX); // You can have 3 different precisions, higher precision takes longer sht4.setPrecision(SHT4X_HIGH_PRECISION); //Precision// You can have 6 different heater settings // higher heat and longer times uses more power // and reads will take longer too! sht4.setHeater (SHT4X_NO_HEATER);//Heating sensor} void loop() { bool valid; uint16_t visible_plus_ir, infrared; sensors_event_t humidity, temp; sht4.getEvent(&humidity, &temp);// populate temp and humidity objects with fresh data Serial.print("Temperature: "); Serial.print(temp.temperature); Serial.println(" degrees C "); Serial.print("Humidity: "); Serial.print(humidity.relative_humidity); Serial.println("% rH"); mqtt.loop(); //Check if new data is available if (sht4 .getEvent(&humidity, &temp)) { if((millis() - lastUpdateAt) > 1000) {//update in 1s interval Temperature2.setValue(temp.temperature); humidity2.setValue(humidity.relative_humidity); lastUpdateAt =millis( ); } } } void onMqttMessage(const char* topic, const uint8_t* payload, uint16_t length) { char message[length]; memcpy(message,payload,length); message[length]= '\0'; Serial.print("dbglNew message on topic:"); Serial.println(topic); Serial.print( "Data:"); Serial.println((const char*)message); if(strstr(message,"on")!=NULL) { int dutyCycle=0; if (sscanf(message,"on#%d" ,&dutyCycle)==1) { } } else if(strstr(message,"off")!=NULL) { } else { Serial.println("Unrecognized message"); } memset(message,0, length); } void onMqttConnected() { Serial.println("Connected to the broker!"); //You can subscribe to custom topic if you need mqtt.subscribe(TOPIC_SUBSCRIBE);//command //mqtt.subscribe(TOPIC SUBSCRIBE2)://status Serial.println("subscribed to topic:" TOPIC_SUBSCRIBE); mqtt.publish(TOPIC_SUBSCRIBE,"Hi EMOX I'mArdinO UNO R4 WIFI^^"); } void onMqttDisconnected() { Serial.println("Disconnected from the broker!"); } void onMqttStateChanged(HAMqtt::ConnectionState state) { Serial.print("MoTT state changed to:"); Serial .println(static_castreadSerial(), HEX); // You can have 3 different precisions, higher precision takes longer sht4.setPrecision(SHT4X_HIGH_PRECISION); //Precision// You can have 6 different heater settings // higher heat and longer times uses more power / / and reads will take longer too! sht4.setHeater(SHT4X_NO_HEATER);//heating sensor} void loop() { bool valid; uint16_t visible_plus_ir, infrared; sensors_event_t humidity, temp; sht4.getEvent(&humidity, &temp);// populate temp and humidity objects with fresh data Serial.print("Temperature: "); Serial.print(temp.temperature); Serial.println(" degrees C"); Serial.print("Humidity: "); Serial.print( humidity.relative_humidity); Serial.println("% rH"); mqtt.loop(); //Check if new data is available if (sht4.getEvent(&humidity, &temp)) { if((millis() - lastUpdateAt) > 1000) {//update in 1s interval Temperature2.setValue(temp.temperature); humidity2 .setValue(humidity.relative_humidity); lastUpdateAt =millis(); } } } void onMqttMessage(const char* topic, const uint8_t* payload, uint16_t length) { char message[length]; memcpy(message,payload,length); message [length]= '\0'; Serial.print("dbglNew message on topic:"); Serial.println(topic); Serial.print("Data:"); Serial.println((const char*)message) ; if(strstr(message,"on")!=NULL) { int dutyCycle=0; if (sscanf(message,"on#%d",&dutyCycle)==1) { } } else if(strstr(message,"off")!=NULL) { } else { Serial.println("Unrecognized message"); } memset(message,0, length); } void onMqttConnected() { Serial.println("Connected to the broker!"); //You can subscribe to custom topic if you need mqtt.subscribe(TOPIC_SUBSCRIBE);//command //mqtt.subscribe(TOPIC SUBSCRIBE2)://status Serial.println("subscribed to topic:" TOPIC_SUBSCRIBE); mqtt.publish(TOPIC_SUBSCRIBE,"Hi EMOX I'mArdinO UNO R4 WIFI^^"); } void onMqttDisconnected( ) { Serial.println("Disconnected from the broker!"); } void onMqttStateChanged(HAMqtt::ConnectionState state) { Serial.print("MoTT state changed to:"); Serial.println(static_castreadSerial(), HEX); // You can have 3 different precisions, higher precision takes longer sht4.setPrecision(SHT4X_HIGH_PRECISION); //Precision// You can have 6 different heater settings // higher heat and longer times uses more power / / and reads will take longer too! sht4.setHeater(SHT4X_NO_HEATER);//heating sensor} void loop() { bool valid; uint16_t visible_plus_ir, infrared; sensors_event_t humidity, temp; sht4.getEvent(&humidity, &temp);// populate temp and humidity objects with fresh data Serial.print("Temperature: "); Serial.print(temp.temperature); Serial.println(" degrees C"); Serial.print("Humidity: "); Serial.print( humidity.relative_humidity); Serial.println("% rH"); mqtt.loop(); //Check if new data is available if (sht4.getEvent(&humidity, &temp)) { if((millis() - lastUpdateAt) > 1000) {//update in 1s interval Temperature2.setValue(temp.temperature); humidity2 .setValue(humidity.relative_humidity); lastUpdateAt =millis(); } } } void onMqttMessage(const char* topic, const uint8_t* payload, uint16_t length) { char message[length]; memcpy(message,payload,length); message [length]= '\0'; Serial.print("dbglNew message on topic:"); Serial.println(topic); Serial.print("Data:"); Serial.println((const char*)message) ; if(strstr(message,"on")!=NULL) { int dutyCycle=0; if (sscanf(message,"on#%d",&dutyCycle)==1) { } } else if(strstr(message,"off")!=NULL) { } else { Serial.println("Unrecognized message"); } memset(message,0, length); } void onMqttConnected() { Serial.println("Connected to the broker!"); //You can subscribe to custom topic if you need mqtt.subscribe(TOPIC_SUBSCRIBE);//command //mqtt.subscribe(TOPIC SUBSCRIBE2)://status Serial.println("subscribed to topic:" TOPIC_SUBSCRIBE); mqtt.publish(TOPIC_SUBSCRIBE,"Hi EMOX I'mArdinO UNO R4 WIFI^^"); } void onMqttDisconnected( ) { Serial.println("Disconnected from the broker!"); } void onMqttStateChanged(HAMqtt::ConnectionState state) { Serial.print("MoTT state changed to:"); Serial.println(static_castprintln("% rH"); mqtt.loop(); //Check if new data is available if (sht4.getEvent(&humidity, &temp)) { if((millis() - lastUpdateAt) > 1000) {// update in 1s interval Temperature2.setValue(temp.temperature); humidity2.setValue(humidity.relative_humidity); lastUpdateAt =millis(); } } } void onMqttMessage(const char* topic, const uint8_t* payload, uint16_t length) { char message [length]; memcpy(message,payload,length); message[length]= '\0'; Serial.print("dbglNew message on topic:"); Serial.println(topic); Serial.print("Data: "); Serial.println((const char*)message); if(strstr(message,"on")!=NULL) { int dutyCycle=0; if (sscanf(message,"on#%d",&dutyCycle)==1) { } } else if(strstr(message,"off")!=NULL) { } else { Serial.println( "Unrecognized message"); } memset(message,0, length); } void onMqttConnected() { Serial.println("Connected to the broker!"); //You can subscribe to custom topic if you need mqtt.subscribe( TOPIC_SUBSCRIBE);//command //mqtt.subscribe(TOPIC SUBSCRIBE2)://status Serial.println("subscribed to topic:" TOPIC_SUBSCRIBE); mqtt.publish(TOPIC_SUBSCRIBE,"Hi EMOX I'mArdinO UNO R4 WIFI^^" ); } void onMqttDisconnected() { Serial.println("Disconnected from the broker!"); } void onMqttStateChanged(HAMqtt::ConnectionState state) { Serial.print("MoTT state changed to:"); Serial.println(static_castprintln("% rH"); mqtt.loop(); //Check if new data is available if (sht4.getEvent(&humidity, &temp)) { if((millis() - lastUpdateAt) > 1000) {// update in 1s interval Temperature2.setValue(temp.temperature); humidity2.setValue(humidity.relative_humidity); lastUpdateAt =millis(); } } } void onMqttMessage(const char* topic, const uint8_t* payload, uint16_t length) { char message [length]; memcpy(message,payload,length); message[length]= '\0'; Serial.print("dbglNew message on topic:"); Serial.println(topic); Serial.print("Data: "); Serial.println((const char*)message); if(strstr(message,"on")!=NULL) { int dutyCycle=0; if (sscanf(message,"on#%d",&dutyCycle)==1) { } } else if(strstr(message,"off")!=NULL) { } else { Serial.println( "Unrecognized message"); } memset(message,0, length); } void onMqttConnected() { Serial.println("Connected to the broker!"); //You can subscribe to custom topic if you need mqtt.subscribe( TOPIC_SUBSCRIBE);//command //mqtt.subscribe(TOPIC SUBSCRIBE2)://status Serial.println("subscribed to topic:" TOPIC_SUBSCRIBE); mqtt.publish(TOPIC_SUBSCRIBE,"Hi EMOX I'mArdinO UNO R4 WIFI^^" ); } void onMqttDisconnected() { Serial.println("Disconnected from the broker!"); } void onMqttStateChanged(HAMqtt::ConnectionState state) { Serial.print("MoTT state changed to:"); Serial.println(static_castprintln("Disconnected from the broker!"); } void onMqttStateChanged(HAMqtt::ConnectionState state) { Serial.print("MoTT state changed to:"); Serial.println(static_castprintln("Disconnected from the broker!"); } void onMqttStateChanged(HAMqtt::ConnectionState state) { Serial.print("MoTT state changed to:"); Serial.println(static_cast<int8_t>(state)); } void onButtonCommand(HAButton* sender) { if(sender ==&buttonON) { Serial.print("[dbg]buttonON");// button A was clicked, do your logic hereelse digitalWrite(LED_BUILTIN, HIGH ); } else if(sender==&buttonOFF) { Serial.print("[dbg]buttonOFF");// button B was clicked, do your logic here digitalWrite(LED_BUILTIN, LOW); } } void wifi_and_mqtt_init() { / /check for the WiFi module: if(WiFi.status()==WL_NO_MODULE) { Serial.println("Communication with WiFi module failed!"); while (true); } String fv = WiFi.firmwareVersion(); if( fv < WIFI_FIRMWARE_LATEST_VERSION) { Serial.println("Please upgrade the firmware"); } //attempt to connect to WiFi network; while(status!=WL_CONNECTED) { Serial.print("Attempting to connect to SSID:"); Serial.println(SECRET_SSID); //Connect to WPA/ WPA2 network, Change this line if using open or WEP network; status=WiFi.begin(SECRET_SSID,SECRET_PASS); delay(10000); } Serial.println("\nStarting connection to MoTT server..."); mqtt.onMessage (onMqttMessage); mqtt.onConnected(onMqttConnected); mqtt.onDisconnected(onMqttDisconnected); mqtt.onStateChanged(onMqttStateChanged); //If you want to change prefix only for non-discovery prefix: mqtt.setDataPrefix("UNO"); if(!mqtt.begin(MQTT_SERVER,MQTT_PORT,MQTT_USERNAME,MQTT_PASSWORD)) { Serial.print("Failed, rC="); Serial.print(mqtt.getState()); //0btaining state of the MoTr connection: Serial .println("try again in 5 seconds"); delay(5000); } } ``` The running effect is as follows
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 After breathing on the sensor, the temperature and humidity both rise. The temperature rises from 30 degrees to 35 degrees. Humidity rises from 60% to 90% ### Flowchart 
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 # Project summary in this wonderful "Follow me" In the second season project, I had the opportunity to explore the powerful Arduino UNO R4 WiF development board and gained a lot of valuable knowledge and skills from it. Through this project, I learned how to build an IoT server by myself, which took me It took me a long time to even give up. Thanks to the assistant for his encouragement. I also learned how to upload local sensor data. In the process of learning about temperature and light sensors, I learned the importance of environmental monitoring and how to program them. These skills are especially important in Internet of Things (IoT) and smart home projects, which opens a door to future technologies for me. The practical operation of these projects not only exercises my hands-on ability, but also Most importantly, they deepened my understanding of hardware programming. I learned how to apply abstract programming concepts to specific hardware devices and solve practical problems. I am very grateful to EEWorld and Digi-Key for providing this learning opportunity. This experience not only enriched my technical reserves, but also laid a solid foundation for my future electronics projects and career. I look forward to applying these new learnings to I hope to apply my skills to more innovative projects and continue to explore and grow in the fields of electronics and programming. # Project Program [attach] 853239 [/attach]
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# End</int8_t></int8_t></int8_t>

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fwme 第二季第二期程序汇总

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秦天qintian0303

Congratulations on your successful completion Details Published on 2024-10-22 08:59

秦天qintian0303

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Published on 2024-10-22 08:59 Only look at the author

Congratulations on your successful completion

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【Follow me Season 2 Episode 2】Arduino UNO R4 WiFi all tasks summary learning + Labview + own expansion project
Eventlink:https://wwwcomhuodong/digikey_follow_me_2024_02/Writteninfront:IamveryluckytobeselectedinthelastbatchofvacanciesIwillstudyandcompletealltheindicatorscarefullyinthefollowingstudies(itisstillveryimportanttopaymoreattentiontotheinfor ...
【Follow me Season 2 Episode 2】Summary of all tasks for Arduino UNO R4 WiFi
[i=s]Thispostwaslasteditedbystarsphereon2024-10-3114:53[/i]Eventlink:https://wwwcomhuodong/digikey_follow_me_2024_02/Videolink:https://trainingcomvideo/41236Codelink:https://downloadcomdetail/eew_KAQaik/634540Projectlink:https://githubStarS ...
Signal Chain Basics Collection 1-20
Thesignalchainincludesacompletesetofsignalprocessesfromsignalacquisition,amplification,transmission,processingtotheexecutionofcorrespondingpowerdevices
What configurations does the XD08M3232 infrared sensing microcontroller have to achieve high-performance processing capabilities?
[Follow me Season 2 Episode 4] Advanced Task 2: IMU machine learning to identify motion status
Conversion between CAD, word, and excel?
STM32MP157A-DK1 Discovery Kit
Please tell me the quiescent current of chips such as TM1638 and TM1629
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