Quectel EG25-G

Hi,

I installed debian 11 on an industrial PC, which has a miniPCIe slot, and a Quectel EG25-G LTE modem. The modem works well, but I cannot send AT commands to it.

This is what I was experimenting so far:

Code:import serial, time

port = '/dev/ttyUSB0'
baudrate = 9600

s = serial.Serial(port=port, baudrate=baudrate, xonxoff=False, bytesize=serial.EIGHTBITS, parity=serial.PARITY_NONE, rtscts=True,dsrdtr=True)
if not s.isOpen():
s.open()

command = 'AT+QGPSCFG\r'
#command ='AT+QGPS\r'

s.write(command.encode())

time.sleep(1)

print('Command sent...')

reply = s.readline()

print(reply)

s.close()The command is sent but no reply from the modem. Do you have any idea?
Thanks,

Zolee