[Python] How can I parse OBD-II data from an ELM327 Bluetooth scanner using Python?

Discussão em 'Python' iniciado por Stack, Junho 28, 2025.

  1. Stack

    Stack Membro Participativo

    I'm working on a small Python project to read live vehicle data from an OBD-II Bluetooth adapter (ELM327-based). I read this blog post which gave me a good overview of using OBD-II tools manually. I'm now trying to automate this via code.

    I'm using pyserial to connect over Bluetooth to /dev/rfcomm0. I can send "010C\r" to request RPM, but the response I get is hard to interpret:

    `b'41 0C 1A F8\r>' I know 010C means RPM, but I'm unsure how to decode 1A F8.

    Here's a snippet of my code: import serial ser = serial.Serial('/dev/rfcomm0', 9600, timeout=1) ser.write(b"010C\r") print(ser.read(100)) How do I reliably parse and convert this data into readable numbers? Any libraries or tips for working with raw OBD-II responses?

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