Did you make it work in ESP32

[Cristianistrate]

Hi, I try to connect PZEM004Tv3 to esp32. No back response. Works fine with ESP8266 (Software serial).
The RX LED on PZEM flashes, but not the TX LED flash (as with ESP8266)
Pins 16,17.
Any suggestions ?

[dasetiawan]

Hi @Cristianistrate, at first if directly connected pzem004t with esp32 there will be no response, this is due to different voltages. so to overcome this it is necessary to add a resistor with a value of 1k ohm on pzem004t so that it will work well on esp32

[Cristianistrate]

Hi, I put the 1K resistor, no luck. Same result. Any other suggestions (again, the module works fine on ESP8266)

[dasetiawan]

is the resistor that you added is correct like this?

[Cristianistrate]

I put it between 5v pins and firs pin of optocupler:
https://user-images.githubusercontent.com/38515985/78626132-0a479380-78b8-11ea-8352-d65957713bdb.jpg
I will put it like you and test it!
Thanks!

[dasetiawan]

to add a resistor, the installation position is like this

[Cristianistrate]

Still no luck. I put 2 500ohm resistors in series =1k
https://www.youtube.com/watch?v=mFvLA4htE50
Thank you for your help, buy I think is time to give up