euc-hud/claude.md

• HUD esp32-c3 xaio with waveshare oled display SSD1309 128x64 connected via SPI https://www.waveshare.com/wiki/1.51inch_Transparent_OLED the pins are

#define OLED_CLK 7 // D5 - SPI Clock (SCL/SCK) #define OLED_MOSI 6 // D4 - SPI Data (SDA/MOSI) #define OLED_RES 3 // D1 - Reset #define OLED_DC 4 // D2 - Data/Command #define OLED_CS 5 // D3 - Chip Select

This device receive EUC battery voltage and current speed from the HUB. It also has 3 buttons left, middle and right respectively attached to pin d06, d07 and d08