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BlueLine One
FirmwareSee engine readings on a round dashboard display
BlueLine One shows live engine readings on a small round display through a Bluetooth adapter in your Mazda's OBD-II port. It displays coolant temperature, RPM, speed and other readings, with experimental Mazda-specific tire-pressure support.
You build and flash an ESP32 display and pair it with the documented LELink adapter. The author tested a 2019 MX-5 ND2 manual, so other cars remain unverified. It needs no MyMazda account or connected-services plan.
- See readings missing from the dashboard
- Experimental individual tire pressures
- Estimated fuel economy
- Configurable shift light and chronograph
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Feedback
How did it go? Tips, problems, questions…