Help: How to communicate with ESP32 through wifi pins?

[tomasbaldi]

Hello, i read "Transfer protocol between ESP and MCU.docx", but i can't send a gcode through UART connection.

I wont send "M991".

I attach my python code:

import serial
ser = serial.Serial('COM13', 125200)
ser.write(b'0xa50x010x08M991\r\n0xfc') # Start flag = 0xa5 / Type = 0x01 / DataLen = 0x08 / Data = M991\r\n / End flag = 0xfc

while True:

s = ser.read(100)
print(s)

ser.close()

If you could help me, I would appreciate it.