ArduinoI2Cslave_receiver Code Repo: https://github.com/IoTmaker/ArduinoI2Cslave_receiver.git See the write-up on Hackster.io: For use with Arduino UNO Arduino as I2C slave receiver for getting current and lumen values from PSoC Analog Coprocessor Pioneer from Cypress. References and Resources https://www.arduino.cc/en/Reference/Wire