uses a raspberrypi and plant sensor to determine when my house plant needs water. When it does it sends a notification to rocket.chat to notify me.

iot-plant-sensor-rocketchat.py

#!/usr/bin/python 
import RPi.GPIO as GPIO
import time
import os
GPIO.setmode(GPIO.BCM)
# set up the GPIO channels - one input and one output
GPIO.setup(23, GPIO.IN)

# input from pin 23
while 1:
        input_value = GPIO.input(23)
        print(input_value)
        if (input_value) :
                os.system("curl -X POST --data-urlencode 'payload={\"username\":\"plant\",\"icon_url\":\"http://<ICON_URL>\",\"text\":\"I need water!\"}' https://<SERVER_AND_TOKEN_STRING")
                time.sleep(120)
        else :
                # do nothing
                time.sleep(5)