Air Quality

SKU:K131

Description

Air Quality is an all-in-one, low-power air-quality monitoring device. Built in are the multifunction air-quality sensor SEN55 and the CO2 sensor SCD40, capable of measuring PM1.0, PM2.5, PM4, PM10 particulate matter, temperature, humidity, VOC, and CO2 concentration. Powered by a StampS3 controller with 8 MB flash, it features a 1.54-inch E-Ink display (200 × 200 px) that retains the last image even when powered off. The 600 mAh battery and RTC-based low-power management circuit enable deep-sleep and timed wake-up. The factory firmware uploads data to M5 EZDATA cloud by default, automatically generating a monitoring dashboard for convenient remote access. On the bottom are LEGO-compatible mounting holes, magnetic pads, and four detachable M3 ears, allowing versatile installation. Ideal for long-term online monitoring in homes, schools, industry, hospitals, and other environments.

Tutorial & Quick Start

Arduino IDE

This tutorial shows you how to program and control the Air Quality device with the Arduino IDE

UiFlow2

This tutorial shows you how to control the Air Quality device with the UiFlow2 graphical programming platform

Features

SEN55 and SCD40 sensors
1.54-inch E-Ink display (200 × 200 px)
Built-in 600 mAh battery
Grove port
EZDATA cloud access
RTC timed wake-up
Development Platform
- UiFlow2
- Arduino IDE
- ESP-IDF
- PlatformIO

Includes

1 × Air Quality
1 × User Manual

Applications

Home environment monitoring
Industrial automation
Medical facilities
Scientific laboratories
Remote monitoring
HVAC optimization
Construction sites

Specifications

Specification	Parameter
SoC	StampS3 (ESP32S3FN8@8 MB Flash, 240 MHz, 2.4 GHz Wi-Fi)
Display	GDEY0154D67 @ 1.54"
Resolution	200 × 200 px
SEN55	I2C address: 0x69
SCD40	I2C address: 0x62
Environment Sensing	PM1.0, PM2.5, PM4, PM10, temperature, humidity, VOC & CO2
RTC	RTC8563
Battery	600 mAh @ 3.7 V
Buttons	Button A (G0), Button B (G8), power, reset & power-off
Grove Port	HY2.0-4P
Buzzer	On-board passive buzzer
Mounting	LEGO holes, magnets & four M3 detachable ears
Operating Temp.	0 ~ 40 °C
Product Size	72.0 × 56.0 × 24.1 mm
Product Weight	91.9 g
Package Size	100.8 × 74.3 × 30.5 mm
Gross Weight	120.0 g

Operation Instructions

Power On/Off

Power-on: Press the "WAKE" button or trigger the RTC IRQ signal. After the wake-up source is triggered, the firmware must set the HOLD pin (G46) to high (1) during initialization to keep the power on; otherwise, the device will return to sleep.
Power-off: Without an external USB power supply, press the RST button, or set HOLD (GPIO46)=0 in firmware to cut the power and shut down.

Download Mode

To enter download mode, first power off the device. Then press and hold the StampS3 “BOOT” button (or the Air Quality G0 button) while plugging in USB; release the button after power is applied.

User Manual

Schematics

Air Quality Schematics PDF

1/1

PinMap

Power Control

ESP32-S3	G10	G46	G42	G14
SEN55 POWER SWITCH	AirPWREN
HOLD		HOLD
WAKE			WAKE
BATTERY DETECT				G14

Display

ESP32-S3	G1	G2	G3	G4	G5	G6
GDEY0154D67	BUSY	RST	D/C	CS	SCK	MOSI

Input

ESP32-S3	G9	G0	G8
BEEP	beep
BUTTON A		USER_A
BUTTON B			USER_B

Sensors

ESP32-S3	G11	G12
SEN55	SDA	SCL
SCD40	SDA	SCL
RTC8563	SDA	SCL

HY2.0-4P

HY2.0-4P	Black	Red	Yellow	White
PORT.A	GND	5 V	G13	G15

Model Size

Datasheets

Softwares

Arduino

UiFlow2

Air Quality UiFlow2 Quick Start

PlatformIO

Air Quality Factory Firmware

Restore Factory Firmware

If the Air Quality device has been flashed with UiFlow firmware and bound to a user, please unbind it in the UiFlow2 device list before reflashing the factory firmware, otherwise data may fail to upload to EZDATA.

[env:m5stack-stamp-s3]
platform = espressif32
board = esp32-s3-devkitc-1
framework = arduino
upload_speed = 1500000
build_flags =
    -DESP32S3
    -DCORE_DEBUG_LEVEL=5
    -DARDUINO_USB_CDC_ON_BOOT=1
    -DARDUINO_USB_MODE=1
lib_deps =
    M5Unified=https://github.com/m5stack/M5Unified

Easyloader

Easyloader	Download	Note
Air Quality User Demo	download	/

Other

Air Quality Restore Factory Firmware

Video

Air Quality Product Function Overview