Source Code for Module SIM800Modem

  1  #SIM800Modem.py 
  2   
  3  import RPi.GPIO as GPIO 
  4  import time 
  5   
  6  VERBOSE = False 
  7  P_POWER = 11 # Power pin 
  8  P_RESET = 12 # Reset pin 
  9   
 10 -def debug(text): 
 11      if VERBOSE: 
 12          print "Debug:---", text 
 13   
 14 -def resetModem(): 
 15      debug("Resetting modem...") 
 16      GPIO.setwarnings(False) 
 17      GPIO.setmode(GPIO.BOARD) 
 18      GPIO.setup(P_RESET, GPIO.OUT) 
 19      GPIO.output(P_RESET, GPIO.LOW) 
 20      time.sleep(0.5) 
 21      GPIO.output(P_RESET, GPIO.HIGH) 
 22      time.sleep(0.5) 
 23      GPIO.output(P_RESET, GPIO.LOW) 
 24      time.sleep(3) 
 25   
 26 -def togglePower(): 
 27      debug("Toggling power...") 
 28      GPIO.setmode(GPIO.BOARD) 
 29      GPIO.setup(P_POWER, GPIO.OUT) 
 30      GPIO.output(P_POWER, GPIO.LOW) 
 31      time.sleep(0.5) 
 32      GPIO.output(P_POWER, GPIO.HIGH) 
 33      time.sleep(3) 
 34      GPIO.output(P_POWER, GPIO.LOW) 
 35   
 36 -def isReady(ser): 
 37      # Resetting to defaults 
 38      cmd = 'ATZ\r' 
 39      debug("Cmd: " + cmd) 
 40      ser.write(cmd) 
 41      time.sleep(2) 
 42      reply = ser.read(ser.inWaiting()) 
 43      time.sleep(8) # Wait until connected to net 
 44      debug("Reply: " + reply) 
 45      return ("OK" in reply) 
 46      
 47 -def connectGSM(ser, apn): 
 48      # Login to APN, no userid/password needed 
 49      cmd = 'AT+CSTT="' + apn + '"\r' 
 50      debug("Cmd: " + cmd) 
 51      ser.write(cmd) 
 52      time.sleep(3) 
 53       
 54      # Bringing up network 
 55      cmd = "AT+CIICR\r" 
 56      debug("Cmd: " + cmd) 
 57      ser.write(cmd) 
 58      time.sleep(5) 
 59       
 60      # Getting IP address 
 61      cmd = "AT+CIFSR\r" 
 62      debug("Cmd: " + cmd) 
 63      ser.write(cmd) 
 64      time.sleep(3) 
 65       
 66      # Returning all messages from modem 
 67      reply = ser.read(ser.inWaiting()) 
 68      debug("connectGSM() retured:\n" + reply) 
 69      return reply 
 70   
 71 -def connectTCP(ser, host, port): 
 72      cmd = 'AT+CIPSTART="TCP","' + host + '","' + str(port) + '"\r' 
 73      ser.write(cmd) 
 74      time.sleep(5) 
 75      reply = ser.read(ser.inWaiting()) 
 76      debug("connctTCP() retured:\n" + reply) 
 77      return reply 
 78   
 79 -def sendHTTPRequest(ser, host, request): 
 80      ser.write("AT+CIPSEND\r") 
 81      time.sleep(2) 
 82      request = "GET " + request + " HTTP/1.1\r\nHost: " + host + "\r\n\r\n"  
 83      ser.write(request + chr(26))  # data<^Z> 
 84      time.sleep(2) 
 85       
 86 -def closeTCP(ser, showResponse = False): 
 87      ser.write("AT+CIPCLOSE=1\r")  
 88      reply = ser.read(ser.inWaiting()) 
 89      debug("closeTCP() retured:\n" + reply) 
 90      if showResponse: 
 91          print "Server reponse:\n" + reply[(reply.index("SEND OK") + 9):] 
 92      time.sleep(2) 
 93       
 94 -def getIPStatus(ser): 
 95      cmd = "AT+CIPSTATUS\n" 
 96      ser.write(cmd) 
 97      time.sleep(1) 
 98      reply = ser.read(ser.inWaiting()) 
 99      return reply 
100