ESP32-WROOM-32 (DOIT ESP32 DEVKIT V1) + PZEM-004T-100A(V3.0) - all returned values are NaN about pzem-004t-v30 HOT 7 OPEN

Hey @AlexGnatko sorry for the late reply but try swapping the RX/TX pins. G16 (ESP RX pin) should be connected to the PZEM TX pin and vice versa.

from pzem-004t-v30.

Hi Alex ,welcome here.
In the example folder there is a sketch named change address :with that read your pzem address,maybe you set a wrong one in the constructor.

from pzem-004t-v30.

Any update on this? Because when I tried it with Arduino Nano on pin 11 and 12 it also returned address 0, error reading voltage.

from pzem-004t-v30.

@iwas108 First of all, the Arduino Nano, has only one hardware serial on pins D0 and D1 (generally used for sending things through the USB to your computer console) You will have to use Software serial with the pins 11 and 12. Check out the PZEMSoftwareSerial for more info. Once you do that, make sure to check the following:

• The PZEM is connected to 230V
• You have connected both the 5V and GND line correctly
• Your RX/TX lines are connected the right way (if not sure, try swapping them)
• You are using the correct unique address (if using multiple PZEMs on one Modbus line)

from pzem-004t-v30.

Hey @AlexGnatko sorry for the late reply but try swapping the RX/TX pins. G16 (ESP RX pin) should be connected to the PZEM TX pin and vice versa.

for anyone had this problem this is the right solution (thanks mr @mandulaj :) )

from pzem-004t-v30.

pues a fecha de hoy yo tengo el mismo problema.
Custom Address:0
Error reading voltage

He intentado de todo y no logro hacer que reporte nada

from pzem-004t-v30.

@jonathanpalomino Could you check that:

1. The PZEMs are connected to the AC voltage
2. The 5V and GND are connected correctly
3. The RX/TX are connected correctly (also trying swapping them)
4. The RX LED should blink every time the MCU tries reading flowed by the TX LED blinking with the response

from pzem-004t-v30.