Hi - hoping for some guidance. I want to add a temp sensor to my car and read it along with existing sensors in my ODB2 app. I’ve seen a simple Canbus shield solution whereby the Arduino mimics the car ECU and responds to a specific PID request from the app/reader (that the real ECU doesn’t use) and provides the voltage given be the sensor.
Problem is my vehicle is older and uses K-Line / ISO 9141-2 not CAN. Am I best to try and achieve this with the OBD2-UART board? I’ve only seen applications where it is functioning as a reader, not a sensor/sender. Any suggestions would be fantastic.
Chris