PMSA003I particulate matter sensor (I2C) with ESP32

Supply 5 V Bus I2C I2C address 0x12 Measures particulates

Pins and ESP32 wiring

Pin	Role	ESP32 pin	Notes
VIN	Power	VIN	Needs 5 V for the fan: use VIN
3VO	Not wired to the ESP32	—	3.3 V output of the on-board regulator. Leave unconnected
GND	Ground	GND
SCL	I2C clock (SCL)	D22
SDA	I2C data (SDA)	D21

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)

#include <Wire.h>

void setup() {
  Serial.begin(115200);
  Wire.begin(21, 22);  // SDA = GPIO 21, SCL = GPIO 22
  Wire.beginTransmission(0x12);
  bool found = Wire.endTransmission() == 0;
  Serial.println(found ? "PMSA003I particulate matter sensor (I2C) found at 0x12" : "Not found: check power, GND and SDA/SCL");
}

void loop() {}

Sources

Plantower PMSA003I datasheet, I2C address 0x12; supply 5 V for the fan, 3.3 V logic
Adafruit PMSA003I guide, Pinout VIN, 3Vo, GND, SCL, SDA

Try it in 3D in BoardPilot

BoardPilot Part data (JSON)

Part data: CC BY 4.0, free to reuse with credit to BoardPilot.

PMSA003I particulate matter sensor (I2C) with ESP32

Pins and ESP32 wiring

Starter code (Arduino)

Sources

Try it in 3D in BoardPilot

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