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Setup the Software: Next, you'll need to install the appropriate libraries for the ESP32 in your Arduino IDE. The ESP32 Arduino core is what you'll likely need.
Coding: You'll need to communicate with the OBD2 scanner somehow. Check out the ELMduino library which is designed to talk to the OBD2 scanner via ELM327 Bluetooth adapters. You might need to read through the library documentation and understand how to send/receive data.
NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a more popular project.
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