Open Source · MIT License

Vehicle telemetry for track days

GPS + IMU sensor fusion on ESP32. G-meter, lap timer with delta, mode detection. No app needed.

Flash Firmware View Source
$50-100
Blackbox
vs
$1,000+
Commercial

What you get

Connect phone to device WiFi, open browser, drive

G-Meter

Real-time lateral and longitudinal g-forces with trail

Lap Timer

Record tracks, time laps, delta-to-best display

Mode Detection

IDLE, ACCEL, BRAKE, CORNER, and combined states

Mobile Dashboard

Works in any browser, no app install

Position Tracking

7-state Kalman filter, 200Hz IMU, GPS correction

Open Source

MIT license, Rust firmware, modify freely

Lap timer with live delta

Record any track by driving it once. Time your laps and see exactly how you compare to your best — updated in real-time as you drive.

  • 30Hz timing (~33ms precision)
  • Circuit and point-to-point tracks
  • Session history saved automatically
  • Auto-detects saved tracks nearby
Full lap timer guide →
Blackbox Dashboard

Delta bar shows ahead or behind your best

-2.3s
Ahead of best lap
+1.5s
Behind best lap

What you need

Four components, all available online

ESP32-C3

~$5

WT901 IMU

~$25

GPS Module

$15-75

WS2812 LED

~$2

Total: $50-100 depending on GPS choice

Flash firmware

Directly from your browser — no toolchain needed

Setup

Status

Ready
Select firmware to begin
Ready.