GSM Raspberry Pi SMS Butler

simbutler.py

# SIMBUTLER.py

# pip install pyserial 

import RPi.GPIO as GPIO
import serial
import time, sys
import datetime

P_BUTTON = 24 # Button, adapt to your wiring

def setup():
    GPIO.setmode(GPIO.BOARD)
    GPIO.setup(P_BUTTON, GPIO.IN, GPIO.PUD_UP)

SERIAL_PORT = "/dev/ttyAMA0"  # Raspberry Pi 2 / Zero W
#SERIAL_PORT = "/dev/ttyS0"    # Raspberry Pi 3

ser = serial.Serial(SERIAL_PORT, baudrate = 115200, timeout = 5)
setup()
ser.write("AT+CMGF=1\r") # set to text mode
time.sleep(3)
ser.write('AT+CMGDA="DEL ALL"\r') # delete all SMS
time.sleep(3)
reply = ser.read(ser.inWaiting()) # Clean buf
print "Listening for incomming SMS..."
while True:
    reply = ser.read(ser.inWaiting())
    if reply != "":
        ser.write("AT+CMGR=1\r") 
        time.sleep(3)
        reply = ser.read(ser.inWaiting())
        print "SMS received. Content:"
        print reply
        if "getStatus" in reply:
            t = str(datetime.datetime.now())
            if GPIO.input(P_BUTTON) == GPIO.HIGH:
                state = "Button released"
            else:
                state = "Button pressed"
            ser.write('AT+CMGS="+49XXXXXXXXX"\r')
            time.sleep(3)
            msg = "Sending status at " + t + ":--" + state
            print "Sending SMS with status info:" + msg
            ser.write(msg + chr(26))
        time.sleep(3)
        ser.write('AT+CMGDA="DEL ALL"\r') # delete all
        time.sleep(3)
        ser.read(ser.inWaiting()) # Clear buf
    time.sleep(5)    

Hello. Very useful script. Do you have an idea how to automatically power on HAT? there is PWRKEY that should be manually pressed.
My idea is to turn it on via Raspberry. Is it possible?

Do you know how to get sender telephone number in order to automatically reply for the sender?

I have at the moment no idea how you can turn on the PWRKEY automatically
You can modify the script and try. The sender telephone number you can read from "ser.write("AT+CMGR=1\r")" but is dangerous and everybody can control your Raspberry Pi.