DIY Code Kit 2

• Editable Ghost Gauge source code for your own DIY build.
• Wiring diagram to follow during assembly.
• Assembly and setup instructions.
• STL files for the supported cases and accessories listed below.

Included printable files

• 1.28-inch round clip-on case.
• 1.28-inch round clip-on case with rotary encoder slot.
• 1.9-inch rectangular BMW E46 ashtray case.
• ESP32 WROOM case.
• Ghost Button.

These are files for 3D printing. The printed cases and accessories are not supplied.

Installation support and future software updates are not included. Coding and 3D-printing experience are recommended.

Choose your display

• 1.28-inch round TFT display.
• 1.9-inch rectangular TFT display. Round-screen features are also available on this format.

2.1-inch display support and the expanded three-round-plus-one-rectangular setup are Kit 3 features.

Core gauge functions

Engine data

RPM, speed, intake-air and coolant temperature, boost, engine load, throttle position and mass airflow.

Electrical & fuel

Battery voltage and voltage range, alternator charge, lambda voltage, battery-health screens, fuel consumption and fuel-rail pressure.

Trip & last drive

Drive time, distance, average and top speed, maximum temperatures and RPM, peak boost, voltage range, new engine codes and drive rating.

Race & diagnostics

Standing and rolling race countdowns and timers, recorded best times, plus reading and clearing engine fault codes.

Themes & settings

Ghost UI, BMW, Audi, Saab, Mercedes and VW styles. Adjust brightness, RPM ranges, warnings, startup pages, units and supported display settings.

Readings depend on your vehicle. The project was developed primarily around the BMW E46. Available data varies with the ECU, OBD-II implementation and sensors; some readings may be unavailable or inaccurate. Boost requires suitable pressure data, and some older Volkswagen Group vehicles using KWP1281 may not provide it. Gear and fuel-rail screens also need the relevant supported data.

This purchase contains no physical hardware. Choose the supported board and display for your build before ordering components.

For a round gauge

• ESP32 WROOM USB-C development board. The published parts list excludes SuperMini, C3 and C4 alternatives.
• Supported 1.28-inch, 7-pin round TFT. Use the exact display specified in the parts list.

For a rectangular gauge

• ESP32 WROOM development module with the supported 1.9-inch screen attached.

For either build

• Compatible ELM327 Bluetooth OBD2 adapter — one per vehicle.
• Push-button rotary encoder with four or five pins — one per vehicle.
• Wiring and suitable connectors for your installation.
• Automotive-grade 12/24V-to-5V buck converter when powering the board from the vehicle supply, plus appropriate fused wiring.
• Access to a 3D printer or printing service if you want to use the supplied STL files.

Do not connect an ESP32 directly to 12V. Follow the supplied wiring diagram and use the regulated power setup specified in the parts list.