Comments (2)
mandulaj
commented on June 25, 2024
Hi @M4carloz, I will reply in English. What happens if you power the PZEM with 3.3V and connect the RX/TX lines directly from the ESP32. (Without using any voltage divider).
You see, the 5V power only powers the opto-coupler, not the actual PZEM chip. Also please try swapping the RX/TX lines, just in case you have them the wrong way around.
I am not sure which sketch you are using, but if you use this sketch PZEMHardSerial it will communicate using the default (broadcast) address, so you shouldn't be getting any Errors setting an address.
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M4carloz
commented on June 25, 2024
@mandulaj Muito obrigado irmão, funcionou perfeitamente.
from pzem-004t-v30.
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