my experiment with GSM HAT

raspberry pi GSM HAT

import serial
import os, time
import RPi.GPIO as GPIO

#SERIAL_PORT = "/dev/ttyAMA0"
SERIAL_PORT = "/dev/ttyS0"
BAUD_RATE = 9600

GPIO.setmode(GPIO.BOARD)

# Pyserial Doc : https://pythonhosted.org/pyserial/pyserial_api.html
with serial.Serial(SERIAL_PORT,baudrate=BAUD_RATE, timeout=1) as port:
	print('sending AT..')
	#port.write(b'AT\r')
	port.write(b'AT+CNUM\r')
	port.flush()
	#port.write(b'AT+CMGF=1\r')
	rcv = port.read(1000)
	print('recvd response')
	print(rcv.decode("utf-8"))
	time.sleep(1)

#port.write(b'ATD919660813119\r')
#print('calling...')
#time.sleep(30)
#port.write(b'ATH\r')
#print('Hang call...')