Download the codes here Arduino simple shield potentiometer code: Arduino shield rc car: Arduino nano module L298P code: ...

This example of a Bluetooth-controlled car created with an Arduino UNO, a 25-gram board, can be dropped to seven grams with a Nano and even lower to five with a Nano Every in its place.

An ELM327 Bluetooth OBD-II reader is hooked up to the car, collecting data on speed and RPM. This data is passed to an ESP-32 and Teensy 3.5.