BoardPilotML8511 analog UV sensor with ESP32
Supply 3.3 V
Bus ANALOG
Measures uv
Pins and ESP32 wiring
| Pin | Role | ESP32 pin | Notes |
|---|---|---|---|
| 3V3 | Power | 3V3 | Chip supply 2.7 to 3.6 V: use 3V3 |
| GND | Ground | GND | |
| OUT | Analog output | D34 | About 1.0 V at no UV, rising with UV. To an ADC1 pin (GPIO 32 to 39) |
| EN | Input (the ESP32 drives it) | D25 | Enable, active HIGH. Can be tied to 3V3 |
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() { Serial.begin(115200); }
void loop() {
int mv = analogReadMilliVolts(34); // OUT on GPIO 34
Serial.println(mv);
delay(200);
}Sources
- LAPIS ML8511 datasheet, Analog voltage output linear with UV intensity (280 to 390 nm); supply 2.7 to 3.6 V
- SparkFun ML8511 hookup guide, Pins 3.3V, GND, OUT, EN; order differs on GY-8511 boards
Try it in 3D in BoardPilot
Related parts
4-20 mA to voltage converter module (HW-685)49E linear hall sensor (SS49E)ACS712 current sensor moduleACS723 current sensor moduleACS758 high-current sensor module (50-200 A)AD8232 ECG heart monitor
Part data: CC BY 4.0, free to reuse with credit to BoardPilot.