First time Bluetooth pairing between ESP32 and ELM327

[paulhth]

Hello,

At the moment I'm trying to build a similar project (ESP-32 connected to an ELM327 via Bluetooth) and I was wondering if there's a special procedure when the two devices have never been paired before. Do we need to pair them manually (connecting both of them to a laptop/phone?) or does the code built in the ELMduino library (and presented on the Arduino forum here) take care of that first time initialization as well?

[jimwhitelaw]

There’s nothing special you need to do to pair the devices prior to using the library. However, you may encounter a situation where your Esp32 will not pair and you need to clear out its internal list of previous connections. See this sketch.