C124 source verification
Verified on 4 October 2026 from manufacturer sources:
| Detail | Value | Source |
|---|---|---|
| Target | AtomS3 Lite, SKU C124; ESP32-S3FN8, 8MB flash, USB-C serial/download | M5Stack product documentation |
| RGB data | GPIO35, one pixel | M5AtomS3 LedDisplay.h and M5Unified 0.2.5 pin table |
| User button | GPIO41, active-low | M5Unified 0.2.5 button sampling cases board_M5AtomS3Lite in setup and update |
Firmware uses NeoPixel's supported WS2812 driver and this explicit board header rather than pulling in display/IMU libraries irrelevant to C124. Pin verification is documentation evidence, not physical verification. The product page's schematic link is shared AtomS3 family material and includes display circuitry; the explicit C124 manufacturer library is used to resolve its LED/button pins.