【Follow me Season 2 Episode 2】Introductory Tasks - Setting Up the Environment - Blink - Serial Port Printing

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【Follow me Season 2 Episode 2】Introductory Tasks - Setting Up the Environment - Blink - Serial Port Printing [Copy link]

 

I am honored to participate in this Follow me event and experience the highly respected Arduino open source hardware platform firsthand. Arduino has won the favor of electronics enthusiasts and educators around the world for its excellent ease of use and flexibility. I look forward to returning home with a lot of gains from this event.

Purchase original parts display:
1. Arduino UNO R4 WiFi

2. SHT40 temperature and humidity sensor expansion board

Environment setup:

Open the Arduino official website: Software | Arduino download and install the software

Open the Arduino software, connect the development board to the computer, and select the corresponding serial port:

At this point, the preparations before writing code have been completed.

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Getting started task: light up the onboard LED and print Hello EEWorld on the serial port!

From the schematic diagram provided by the development board, we can see that the pin of the user LED is: DL4 (yellow).

Open File->Example->Basics->Bink
to create a basic Bink example and add serial port printing on this basis.

Sample code and comments:

The Arduino's built-in LED flashes once every second and sends a "Hello EEWorld!" message over the serial port each time the LED changes state:

void setup() {
  // 初始化内置LED引脚为输出模式。
  pinMode(LED_BUILTIN, OUTPUT);
  
  // 初始化串口通信，波特率为9600
  Serial.begin(9600);
}

// loop函数会无限次地反复运行
void loop() {
  digitalWrite(LED_BUILTIN, HIGH);  // 打开LED（HIGH表示高电压水平）
  Serial.println("Hello EEWorld!"); // 通过串口打印消息
  delay(1000);                      // 等待一秒钟
  
  digitalWrite(LED_BUILTIN, LOW);   // 关闭LED，通过使电压变为LOW
  Serial.println("Hello EEWorld!"); // 再次通过串口打印消息
  delay(1000);                      // 等待一秒钟
}

Video effect display after code burning:

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