BoardPilotLED with 220 Ω resistor with ESP32
Supply 3.3 V
Bus GPIO
Pins and ESP32 wiring
| Pin | Role | ESP32 pin | Notes |
|---|---|---|---|
| A | Input (the ESP32 drives it) | D25 | Anode (long leg), through the resistor to a GPIO |
| K | Ground | GND | Cathode (short leg, flat side) |
Suggested wiring for the 30-pin ESP32 DevKit, avoiding flash, input-only and strapping pins. BoardPilot checks it for you as you wire.
Starter code (Arduino)
void setup() { pinMode(25, OUTPUT); } // A
void loop() {
digitalWrite(25, HIGH);
delay(500);
digitalWrite(25, LOW);
delay(500);
}Sources
- Generic 5 mm LED, Forward voltage about 2 V (red); 220 Ω at 3.3 V gives about 6 mA
Try it in 3D in BoardPilot
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Part data: CC BY 4.0, free to reuse with credit to BoardPilot.