Yamaha DataLogger

ESP32 s3 BLE Yamaha Datalogger

Description:

• The Yamaha DataLogger is an ESP32-S3 based device designed to convert k-line data into Canbus ODB2 standard, using ELM327 emulation. Enabling compatibility with apps like RaceChrono, Realdash, and Torque.
• Now displays PIDS via OLED screen.
• Now handles automatic gear ratio tuning via BLE Serial "Gears", (using gipro gear indicators learn function approach).

updates:

• Migrated NVS to spiffs
• gear ratios persist on cold boot / auto load on startup
• added simple temrinal menu via serial/ble
• All serial/ble serial commands are simultaneously mirrored.
• General tidy up
• Migrated send/response commands

Added Files:

• Added Ecu Emulator for testing
• Added Torque app PID.csv
• Wokwi PCB Design
• My custom PCB build
• L9637d pinout
• Realdash XML (Plug and play)
• racechrono.rcz file
• 3d Printed Case STL + Photos
• 3D printed case with switch mount (switch can be found below):
• https://www.amazon.co.uk/dp/B01N367QLZ

Added OLED Support:

• 0.96" I2C

Supported PIDs:

• RPM
• Speed
• Error code
• Coolant Temp
• Gear
• MCU Temp
• CPU Freq
• Ram Free
• Top Speed
• MCU Uptime seconds

Requirements:

To build this project, you will need the following components:

• L9637D
• 510 pull-up resistor Not needed for RX
• Level conversion components
• Due to ESP32 startup time, an external power supply switch will be required to enable esp32 to start before the ecu! This saves re-writing the codebase.

Additional Information:

• It's possible to pozi-tap the loom for other sensor data not sent via the k-line.
• Wokwi circuit design: https://wokwi.com/projects/391712730296045569
• Thingverse link here: https://www.thingiverse.com/thing:6560376

Big thanks to:

• TriB For the L9637D's and LOTS of wise advice from an ECU VET :)
• The Dude Discord: @skydiving123 For Schooling me alot :P \o/
• Unexpected Maker: for the Feather S3 and support
• RealDash
• Race Chrono