#!/usr/bin/env python3

import serial
import os
import time

CONF_PATH = '/run/modem'
ser = serial.Serial('/dev/ttyACM0', 115200, timeout=0.5)
while True:
    try:
        ser.read()
        break
    except Exception:
        pass


os.makedirs(CONF_PATH, exist_ok=True)
config_file = open(CONF_PATH + '/modem-at.config', 'w')

def read_config(cmd, label=''):
    while True:
        try:
            ser.flushInput()
            ser.write(cmd)
            ser.write(b'\r')
            s = ser.read_until(b'OK')
            if(len(s.decode('utf-8')) < 4): # Avoid empty response just after reset
                continue
            break
        except Exception as e:
            print("Exception : " + str(e))
            time.sleep(1)
            continue
        
    config_file.write(label + '\n')
    config_file.write(s.decode('utf-8').strip("OK"))


read_config(b'AT+CGMI', 'Manufacturer identification');
read_config(b'AT+GMI', 'Manufacturer identification');
read_config(b'AT+CGMM', 'Model identification');
read_config(b'AT+GMM', 'Model identification');
read_config(b'AT+CGMR', 'Firmware version identification');
read_config(b'AT+GMR', 'Firmware version identification');

config_file.write('-' * 80 + '\n' * 2)

read_config(b'AT+UCGDFLT?', 'Initial EPS bearer / PDP context');
read_config(b'AT+UBMCONF?', 'Boot mode configuration, 1 = router, 2 = bridge')
read_config(b'AT+UUSBCONF?', 'USB profiles configuration')