LED Status Indicators
Overview
Two LEDs give instant mode feedback at a glance: red for BEACON, blue for SEARCH. This page covers every blink pattern.
LED Wiring
| LED | GPIO | Resistor |
|---|---|---|
| LED_RED (BEACON) | 27 | 330 ohm to GND |
| LED_BLUE (SEARCH) | 26 | 330 ohm to GND |
Patterns by Mode
| Mode | LED pattern | Meaning |
|---|---|---|
| BEACON | Red blink with each TX | Transmitting |
| SEARCH | Blue slow blink | Scanning |
| SEARCH | Blue fast blink | Signal detected |
| CONFIG | Both blink | WiFi AP active |
| EMERGENCY | Red fast | Emergency TX |
| Boot | Both briefly | Power-on self test |
Reading the Rhythm
The LED rhythm mirrors the radio activity:
- In BEACON, red blinks with the payload keying, so you can watch TX without the OLED.
- In SEARCH, blue blinks slow on quiet passes and speeds up when the RSSI crosses the threshold.