A python file that defines the class used to communicate to an Arduino from a Raspberry Pi over I2C

ArudinoComm.py

import smbus
import time


class Communication:

    def __init__(self, address=0x00):
        # This is the address we setup in the Arduino Program
        self._address = address
        # for RPI version 1, use “bus = smbus.SMBus(0)”
        self._bus = smbus.SMBus(1)
        print("Communication Class initialized")

    # This is the address we setup in the Arduino Program

    def writeNumber(self, value):
        self._bus.write_byte(self._address, value)
        # bus.write_byte_data(address, 0, value)
        print("Value sent")

        return -1

    def readNumber(self):
        number = self._bus.read_byte(self._address)
        # number = bus.read_byte_data(address, 1)
        return number


if __name__ == "__main__":
    ac = Communication()
    while True:
        var = input("Enter 1 – 9: ")
        if not var:
            continue

    ac.writeNumber(var)
    print(f"RasPI: Hi Arduino, I sent you {0}\n", var)
    # sleep one second
    time.sleep(1)

    number = ac.readNumber()
    print(f"Arduino: Hey RasPI, I received a digit {0}\n", number)