Trivial script to sniff slow Tuya traffic between an embedded MCU and the TYWE3S serial pins

serialdump.py

#!/usr/bin/python3

import serial

TX = serial.Serial(port = "/dev/ttyS2", baudrate=9600, timeout=1)
RX = serial.Serial(port = "/dev/ttyS4", baudrate=9600, timeout=1)

while True:
    tx = TX.readline().hex()
    if tx != '':
        print('TX: ', tx)

    rx = RX.readline().hex()
    if rx != '':
        print('RX: ', rx)