Air Quality Monitor (PM 2.5, Temperature & Humidity Sensor)

The Air Quality Monitor measures PM10, PM2.5, PM1.0, temperature, and humidity using laser scattering. It's compatible with Arduino and STM32 devices.

PIN1Official table 2 row 1
VCC / + (+5V)
Type · power
PIN2Official table 2 row 2
GND / -
Type · ground
PIN3Official table 2 row 3
SET / Set pin/TTL level @3.3V, high level or suspending is normal working status, while low level is sleeping mode.
Type · power
PIN4Official table 2 row 4
RXD / Serial port receiving pin/TTL level @3.3V
Type · power
PIN5Official table 2 row 5
TXD / Serial port transmitting pin/TTL level @3.3V

Start wiring

I2S · UART

Verify supply voltage and logic levels before powering up.

Module pins: PIN1, PIN3, PIN4, PIN5, PIN6, PIN2. Schematik maps them to your board in the app.

Related groups

4 groups

Air quality

Choose between MQ gas sensors, VOC/eCO2 indoor-air sensors, true CO2 modules and particulate sensors without treating every air-quality breakout as the same detector.

Sensors · Gas & air-quality sensors · 29 parts

Temp and humidity

DHT11, DHT22/AM2302, and DHT20/AHT20 sensors solve the same broad job, but only some are acceptable substitutes in the same circuit.

Sensors · Environment sensors · 19 parts

Environment sensors

Choose between temperature-only, temperature/humidity, pressure and indoor air-quality modules without treating every environmental sensor as a drop-in substitute.

Sensors · Environment sensors · 8 parts

Light and colour

Photoresistors and color sensors both respond to light, but they expose very different signals and are not sensible drop-in substitutes.

Sensors · Light & color sensors · 6 parts

Pin	Position	Type	Function
PIN1	Official table 2 row 1	power	VCC / + (+5V)
PIN2	Official table 2 row 2	ground	GND / -
PIN3	Official table 2 row 3	power	SET / Set pin/TTL level @3.3V, high level or suspending is normal working status, while low level is sleeping mode.
PIN4	Official table 2 row 4	power	RXD / Serial port receiving pin/TTL level @3.3V
PIN5	Official table 2 row 5	power	TXD / Serial port transmitting pin/TTL level @3.3V
PIN6	Official table 2 row 6	power	RESET / Module reset signal /TTL level @3.3V, low reset
PIN7	Official table 2 row 7	pin	NC /
PIN8	Official table 2 row 8	pin	NC /

Pinout

Start wiring

Air quality

Temp and humidity

Environment sensors

Light and colour