Arduino sends a simple command throgh serial port then the pyscript act as server for services like IFTTT or Telegram
Step 1: IFTTT
Step 2: Telegram
Step 3: We're Ready
Now connect Arduino to a USB port of your computer, open IDE and get the name of serial port (something like /dev/tty.usbmodem314)
Download file attached!
open pyscript.py from the file you downloaded, write the correct keys and change the messages!
Complete the easy circuit, load Arduino.ino to your board and finally run python pyscript.py