BoardPilotSharp GP2Y0A21 IR distance (10-80 cm) with ESP32
Supply 5 V
Bus ANALOG
Measures distance
Pins and ESP32 wiring
| Pin | Role | ESP32 pin | Notes |
|---|---|---|---|
| VO | Analog output | D34 | Output about 0.4 V (80 cm) to 3.1 V (10 cm). To an ADC pin (prefer ADC1: GPIO 32 to 39) |
| GND | Ground | GND | |
| VCC | Power | VIN | Needs 5 V: use VIN |
Suggested wiring for the 30-pin ESP32 DevKit, avoiding flash, input-only and strapping pins. BoardPilot checks it for you as you wire.
This module is sold for 5 V. Its outputs may be 5 V: use a level shifter or a voltage divider on ESP32 inputs.
Starter code (Arduino)
void setup() { Serial.begin(115200); }
void loop() {
int mv = analogReadMilliVolts(34); // VO on GPIO 34
Serial.println(mv);
delay(200);
}Sources
- Sharp GP2Y0A21YK0F datasheet, Terminal 1 Vo, 2 GND, 3 Vcc; supply 4.5 to 5.5 V
Try it in 3D in BoardPilot
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Part data: CC BY 4.0, free to reuse with credit to BoardPilot.