PZEM-004T V3 auto reset Energy usage each month

[PeteKnight]

I’m guessing that you don’t have the crc16h library installed from the GitHub repository linked in this post…

Problem PZEM-004T Version 3.0

make a wiring connection for PZEM-004 v3.0 and ESP8266: (either NodeMCU and Wemos) ESP8266 5V ==> PZEM 5V ESP8266 G ==> PZEM GND ESP8266 Rx ==> PZEM_Rx -> D6(GPIO12 - Tx) ESP8266 Tx ==> PZEM_Tx -> D5(GPIO14 - Rx) #include <SoftwareSerial.h> SoftwareSerial pzem(14,12); // (RX,TX) connect to TX,RX of PZEM for ESP8266 bare board void resetEnergy(uint8_t slaveAddr){ //The command to reset the slave's energy is (total 4 bytes): //Slave address + 0x42 + CRC check high byte + CR…

Pete.