Documentation
Docs
Every wire, every PID, every pin. These docs are the source of truth for builds at each phase of the project. Mermaid diagrams are rendered client-side.
Reference
OBD2 PID Reference
Standard and extended PIDs, CAN bus message IDs, and baud rate for BMW E81 N47 DDE7.0.
v0.1 · v0.2
Wiring — OLED Display
SSD1306 OLED connections for v0.1, plus Bluetooth ELM327 pairing for v0.2 (no USB adapter needed).
v0.3 · v0.4
Wiring — ILI9488 3.2" TFT
ILI9488 SPI pin map, library setup, and driver-chip warnings for v0.3 and v0.4.
v1.0 · v1.1
Wiring — Direct CAN Bus (MCP2515)
MCP2515 + TJA1050 CAN controller wiring, T-tap installation, and MP1584 buck converter power for v1.0 hardwired install.
v2.0
OTA Firmware Updates
HTTP-based over-the-air firmware update architecture for ESP32 once the device is hardwired to the car (v2.0).