Followed this thread on enabling the serial console on the Raspberry Pi 3B.
Checked the functionality using this code:
dmesg | grep tty
Which produced these results:
...
console [tty1] enabled
...
console [ttyAMA0] enabled
However, when I tried to use pymodbus, I couldn't even connect to the client. Used this code:
import pymodbus
from pymodbus.client.sync import ModbusSerialClient as ModbusSerialClient
from pymodbus.register_read_message import ReadInputRegistersResponse
client = ModbusSerialClient(method='rtu', port='/dev/ttyAMA0', stopbits=1, bytesize=8, parity='N', baudrate='9600', timeout=0.3)
connection = client.connect()
My Raspberry Pi 3B is not communicating with the energy meter (53U-1211-AD4/H), used the energy meter's T1, T2, T4 (GND) for the modbus connection. Used the RPI's UART pins 8 & 10 (GPIO14 & GPIO15).
Error:
...
self socket interCharTimeout = self.inter_char_timeout
...
AttributeError: 'NoneTyoe' object has no attribute 'interCharTimeout'
Anyone used pymodbus before? I've been on this for days, followed several threads on enabling the serial port to no avail.
