search

mandulaj / PZEM-004T-v30

Arduino library for the Updated PZEM-004T v3.0 Power and Energy meter
MIT License
256 stars 108 forks source link

Very often errors in response #58

Closed rogerknop closed 2 years ago

rogerknop commented 3 years ago

Hi, I am using PCEM-004T-v30 with a NodeMCU on PINs D5 and D6. It looks almost good, but I get a lot of errors that data could not be read. I checked your code and it happens in updateValues because "recieve(response, 25) != 25" fails. When comment that line out it works. I am only interested in Power and probably Power is updated correctly even if this check fails. Any idea? Thanks & regards, Roger

loopyengineeringco commented 2 years ago

I'm not sure about the receive response 25 thing, but a more general question - are you using an esp32 or esp8266 NodeMCU? If it's an esp32 version and you're using SoftwareSerial, it's very unreliable - I analysed the comms using a logic analyser and they were full of frame errors. Make sure it's using HardwareSerial and remap the pins manually if you have to.

rogerknop commented 2 years ago

I am using NodeMCU. But I will check that. Thanks! Roger

mandulaj commented 2 years ago

As @ASMotionLab said, SoftwareSerial for ESP32 is unreliable. It will be discontinued for that platform in the future versions until we can find a fix.

mandulaj commented 2 years ago

I will close this issue now. If you have any further questions or comments regarding SoftwareSerial on the ESP32, please put them in the issue #70