Jeremy Fidler
Published © GPL3+

Raspberry Pi zero SMS relay

Hologram Nova and Raspberry PI simple SMS based relay control

IntermediateWork in progress3 hours2,745
Raspberry Pi zero SMS relay

Things used in this project

Hardware components

Raspberry Pi Zero
Raspberry Pi Zero
×1
Hologram Nova
Hologram Nova
×1
Haiworld 4 Channel DC 5V Relay Module for Arduino UNO R3 MEGA 2560 1280 DSP ARM PIC AVR STM32 Raspberry Pi
×1

Story

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Schematics

starter_h0Xty5mgUa.fzz

Code

starter.py

Python
Python to actuate relays via SMS and Hologram Nova
#!/usr/bin/env python
#starter.py - a quick and dirty remote start via SMS project
#came about when I was driving a work truck to my personal truck located at the shop I work in
#the thermometer in the work truck told me it was 17 degrees. I wished there was a way to start my personal
#from wherever I am instead of the limited range of the keyfob I have to remote start it normally.
#add 
#    "sudo python /home/pi/starter.py &"
#to the file "/etc/rc.local" before the end where it says
#   exit 0
#The personal has an Avitol 4103 remote start installed, with an activation pin.
#all the wiring I am going to do is tied in to the wiring for the remote start.
#First ever python project. 
import time #import some stuff to help us out
import datetime
import sys
from Hologram.HologramCloud import HologramCloud #this one helps the most
import RPi.GPIO as GPIO #this one is awesome too
GPIO.setwarnings(False) #turn off warnings
GPIO.setmode(GPIO.BCM) #initialize gpio mode and set pins to off by default
GPIO.setup(17, GPIO.OUT, initial=GPIO.HIGH) #GPIO wired to start relay
GPIO.setup(18, GPIO.OUT, initial=GPIO.HIGH) #GPIO wired to flash parking lights
GPIO.setup(22, GPIO.OUT, initial=GPIO.HIGH) #GPIO wired to door lock relay
GPIO.setup(27, GPIO.OUT, initial=GPIO.HIGH) #GPIO wired to door unlock relay
print 'Remote Start SMS Controller' #welcome message for console
hologram=HologramCloud(dict(), network='cellular') #setup hologram cloud
hologram.enableSMS #tell hologram to listen for sms
recv=None #if we dont set initial variables the loop breaks
cmd=None
while True: #start the loop
	recv = hologram.popReceivedSMS() #this works, makes the recv variable equal an incoming message
	if recv is not None: #works, run the following code when a message comes in
		print 'SMS From: ', recv.sender #print the sender of the sms
		cmd = recv.message #works, makes the cmd variable the payload of the message.
		print cmd #works, prints only what the sms message is.
		#we want to look for 3 commands, start, lock, or unlock. I have no clue how to deal with mismatched cases so I did this.
		#we also have parking light flash on the lock and unlock functions. the remote starter flashes the lights during the start command.
		if cmd == 'Start' or cmd == 'start': #works,(thanks Gary H.) checks for start or Start
			print 'Start command received' #let the console show we know the SMS had the word start and we will process it
			GPIO.output(17, GPIO.LOW) #close the starter relay. The remote start expects a pattern.
			time.sleep(1) #wait one second with the relay closed
			GPIO.output(17, GPIO.HIGH) #open the relay
			time.sleep(1) #wait one sec, relay open
			GPIO.output(17, GPIO.LOW) #close the relay again
			time.sleep(1) #wait one, relay closed
			GPIO.output(17, GPIO.HIGH) #open the relay again, completeing the expected activation pulse to the remote start.
			print 'Start command executed' #let the console know we did it
		elif cmd == 'Lock' or cmd == 'lock': #works, checks for lock or Lock
			print 'Door lock command received' #let the console know the SMS was lock or Lock
			GPIO.output(18, GPIO.LOW) #Close the light relay
			GPIO.output(22, GPIO.LOW) #Close the door lock relay
			time.sleep(.5) #wait half a second
			GPIO.output(18, GPIO.HIGH) #Open the light relay
			GPIO.output(22, GPIO.HIGH) #open the door lock relay
			print 'Door lock command executed' #let the console know we did it
		elif cmd == 'Unlock' or cmd == 'unlock': #works, checks for unlock
			print 'Door unlock command received' #let the console know unlock or Unlock
			GPIO.output(18, GPIO.LOW) #Close the light relay
			GPIO.output(27, GPIO.LOW) #Close the door unlock relay
			time.sleep(.5) #wait half a second
			GPIO.output(18, GPIO.HIGH) #open the light relay
			GPIO.output(27, GPIO.HIGH) #open the door unlock relay
			time.sleep(.5) #wait again
			GPIO.output(18, GPIO.LOW) #close light relay
			time.sleep(.5) #wait one more time
			GPIO.output(18, GPIO.HIGH) #open relay
			print 'Door unlock command executed' #let console know we did it
	if recv is None: #works, runs the following code when there is no message
		print 'No Command, sleep 60 seconds', datetime.datetime.now() #works, prints timestamp, handy for troubleshooting
		time.sleep(60) # one minute checks for new messages seems reasonable
		print '' #prints a blank line in the console between timestamps when we have no messages for my personal prefrence

Credits

Jeremy Fidler

Jeremy Fidler

1 project • 1 follower
Tower climber for a living. Technology and IOT are a hobby. I have a RFID chip implanted.

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