New national standard five-hole metering socket 10A

New national standard five-hole metering socket 10A This socket uses the new national standard five-hole shell, which is easier to wire than the old shell. While retaining the characteristics of the old model (magnetic latching relay, energy metering, OTA upgrade firmware), it also solves the last short board (current counting is unstable, the shell cannot fit perfectly, etc.). It is a complete metering socket. Disclaimer: This socket uses 220V AC power. There may be risks of electric shock, high temperature burns, etc. that may cause injury, disability, and death during DIY and use. Please operate in strict accordance with safety regulations and provide adequate protection. Minors should operate with the assistance of their guardians. Using this solution means that you have sufficient knowledge of safety risks. Please make sure that you have sufficient knowledge reserves before operating. Any losses and consequences caused are at your own risk, and I do not bear any legal responsibility. I am a software enthusiast, not an electronic hardware major. Therefore, I may not know a lot of basic hardware knowledge. If there is anything wrong with the circuit diagram, I hope you will give me some advice and thank you. Hardware description: 1. Two options are available. The power metering chip can use option 1 (BL0937) or option 2 (BL0942). 2. The old version of the shell used before has many inconveniences in PCB wiring. The pins are straight up and down through the circuit board, which is very inelegant when welding. In addition, the protrusions on the shell will always be blocked, which is not perfect. So the shell was replaced and the above defects were solved. 3. Due to the size limit of the shell, the magnetic latching relay can only be used in an ultra-small size. I only found this one that is suitable and not so expensive (FH44L-1AT-L1-DC5V). If you have a more suitable one, please leave a message in the comment area (requirements: magnetic latching relay, withstand voltage 220V10A and above, approximate size 20x10x15mm). 4. The MCU part needs to be printed separately, so this project actually needs to print two boards, namely the socket body (Scheme 1 or Scheme 2) and the plug-in module, and the thickness of the two PCBs is 1mm. 5. The metering chip of Scheme 1 uses BL0937, which has the advantage of being cheap and simple peripheral circuits. The disadvantage is that it needs to be calibrated before use, but it only needs to be calibrated once, so it is not a big problem. 6. Solution 2 uses BL0942. Its advantage is that it does not require calibration, and it has slightly more metering functions. 7. No isolated power supply is used, and the 220V AC L line is directly connected to GND, so the entire PCB is charged with strong electricity. During debugging, the shell must be plugged into the plug board for testing, and the shell can be easily unplugged without glue. Please cherish your life. 8. If during the PCB board making process, the manufacturer prompts: the middle milling slot connection position is too small, the board will break, etc., please reply: I have known and accepted the risks brought by this reason, please produce directly according to the Gerber file, thank you! Software Description: 1. The compilation environment is VScode+PlatformIO2. Using the open source MQTT solution, you can get a cloud server with unlimited device number and usage period without spending a penny. 3. In actual use, it is found that although the public and free MQTT server can also be used, the delay is relatively large. If the real-time requirements are relatively high, it is recommended to build a MQTT server on a cloud server or router (EMQX is recommended, which is free and powerful). 4. The mobile terminal no longer uses MQTT dashboard_v0.4.5_apkpure.com.apk. This APP has not been upgraded for a long time, and it does not fully support JSON and cannot be used. Change to IoT MQTT Panel_0.45.18_Apkpure.apk in the attachment. This APP interface is OK, it is also convenient to use, and it fully supports JSON, but it has ads. (If you have a more suitable mobile APP, please leave a message in the comment area) The main functions of the software: 1. Support web page network configuration 2. Support WeChat scan code configuration (not recommended, not 100% successful) 3. Support network synchronization NTP 4. Support MQTT, which helps to have a more thorough understanding of the working mechanism of the Internet of Things. Use the switch, countdown timer, timer, etc. on the MQTT mobile APP to turn on or off the socket. 5. The timer program is implemented locally on the socket, not in the cloud. As long as the parameters are submitted and saved, the socket can still be turned on or off at a scheduled time even if the network is disconnected later. Therefore, it is possible to physically restart the optical modem or router with this socket. 6. Support OTA online firmware upgrade, and the firmware can be upgraded through the network. No need to painfully remove the board and re-flash the firmware. 7. Support LittleFS file system, which can save various parameters when the power is off. Even if the socket is powered off and restarted, the original parameters are still there. 8. Support power metering, which can display real-time voltage V/current mA/power W, and total power consumption kWh. 9. Web network configuration page, support uploading firmware and file system through the web. Used for firmware flashing brick recovery. 10. Support HomeAssistant MQTT automatic discovery, MQTT integration can be used for convenient control. Related component sources: 1. Socket shell (including the 220V10A male and female integrated socket inside) -> Buy more than 2 at a time on Alibaba. It is cheap. The electronic button is an ordinary 6x6x5 side button, or you can buy it separately. 2.AC220V TO DC5V switching power supply module I have bought all the links on the right (note: buy the 5V one with pins) -> Link 1 Link 2 Link 3