SI21/week3/call.py

from sim800l import SIM800L
import logging
import os
import time
#import subprocess
#logging.getLogger().setLevel(5)

sim800l = SIM800L(port='/dev/serial0', baudrate=115000, timeout=3.0)
print(sim800l.command("ATS0=0\n"))
time.sleep(2)
print(sim800l.command("AT\n"))
time.sleep(5)
print(sim800l.command("AT+DDET=1"))
time.sleep(3)

while True:
	activecall = sim800l.command("AT+CPAS\n")   #check if someone is calling or not
	if "+CPAS: 3" in activecall:                #if someone is calling
		print("some one is calling")          
		time.sleep(3)                       #wait 3 seoncds
		sim800l.command("ATA\n")            #answer the phone
		print("playing python file")
		os.system("play test.wav &")
		#p = subprocess.Popen([sys.executable, 'audio.py'], 
                                    #stdout=subprocess.PIPE, 
                                    #stderr=subprocess.STDOUT)
		while True: 
			#check if call is still active
			callisactive = sim800l.command("AT+CPAS\n")
			if "+CPAS: 0" in callisactive:   #call is not active anymore
				print ("call stopped")
				os.system("killall play")
				#p.terminate()
				break