Meaning of the LEDs
The meaning of the Raspberry Pi LEDs are publicly known. For details about those LEDs, refer to the Raspberry Pi documentation or your preferred search engine.
Following a list of the currently known/implemented xCore LED meanings:
| Left “Info” LED | Right “Heartbeat” LED | Meaning |
|---|---|---|
| Anything | Controlled by the application firmware, check firmware documentation | |
| 2 blue quick flashes (continuous) | Bootloader mode | |
| 2 green quick flashes (continuous) | Firmware running normally | |
| Off or permanently on | Firmware/system crashed or stuck | |
| Red | Severe error / something went seriously wrong |
Last modified May 1, 2026: Fix grammar and update LED meanings in documentation (6d594aa)