Thanks, it works great for now. only kWh need to be converted to Wh for P1 meter ( Domoticz) thanks for the reply. in espeasy pzem settings d1 and d2 are not allowed Menu Hardware -> I2C Interface -> GPIO ⇄ SDA = None / GPIO → SCL = None Then, D1,D2 will be available. (Same for D9-Rx/D10-Tx in Tools...

Thank you very much thanks for the reply. in espeasy pzem settings d1 and d2 are not allowed Menu Hardware -> I2C Interface -> GPIO ⇄ SDA = None / GPIO → SCL = None Then, D1,D2 will be available. (Same for D9-Rx/D10-Tx in Tools->Advanced -> uncheck "Enable Serial port")

@mojso Supply PZEM with 5V directly (as your first schematic. No 1k requested). But don't use D3 and D4 for communication because these pin can prevent ESP to boot. D1,D2 can be used in place. thanks for the reply. in espeasy pzem settings d1 and d2 are not allowed maybe D6 and D7 will be ok to use...

how to connect wemos d1 mini properly with pzem 004T v3.0 100A? schematic rx / tx as in this picture
can i use 3.3v with the same schematic or do I need a
1k ohm resistor, from the 5v pin in the optocoupler
Or

how to send this raw codes or how to convert it to raw2 http://192.168.1.102/control?cmd=IRSEND,RAW, .... // ON/OFF (toggle): uint16_t TOGGLE[21] = {6680, 2412, 3374, 1560, 920, 732, 918, 1594, 1720, 758, 894, 1584, 896, 732, 920, 1558, 1748, 758, 1722, 1584, 1720}; // UNKNOWN 9EB58962 // Power Up (...

how to send this raw codes or how to convert it to raw2 // ON/OFF (toggle): uint16_t TOGGLE[21] = {6680, 2412, 3374, 1560, 920, 732, 918, 1594, 1720, 758, 894, 1584, 896, 732, 920, 1558, 1748, 758, 1722, 1584, 1720}; // UNKNOWN 9EB58962 // Power Up (flame up): uint16_t P_UP[19] = {6778, 2336, 3446, ...