Generic bluetooth adapter from ebay, generally alright but some can suffer from build quality issues affecting reliability, and causing strange things to ...
KKmoon V1.5 ELM327 USB To OBDII OBD2 CAN-BUS Diagnostic Interface Scanner: Amazon.co.uk: Car & Motorbike
The app can also read and reset OBD II codes. Free to sample but will only remember two laps; you'll need the pay version beyond that.
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