README.md

Supported Targets	ESP32-C3

AirQM_ESP32C3

Air quality monitor using ESP32-C3 and sensors to measure temperature, relative humidity, dust particles, CO2, VOC and NOx.

Components used

Item	Buy link
ESP32-C3 SuperMini	Aliexpress
senseAir S8 004-0-0053	Aliexpress
PMS5003	Aliexpress
SHT45	Aliexpress
SGP41	Aliexpress
Oled Display	Aliexpress
Magnets (5x3mm)	Aliexpress
M2 set (M2A)	Aliexpress

Hardware

Neodim magnet: 5mm diameter, 3mm height
Heat insert: M2 x 3 x 3.2 for main board
Screws: M2 for PMS5003

Pin connection matrix

| ESP32-C3 |  OLED   |  SGP41  |  SHT45  | Senseair S8 | PMS5003  | WS2812 |
|----------|---------|---------|---------|-------------|----------|--------|
| GND      | Pin GND | Pin GND | Pin GND | G0          | PIN2 GND |        |
| 3V3      | Pin 3V3 | Pin 3V3 | Pin 3V3 |             |          |        |
| 5V       |         |         |         | G+          | PIN1 VCC |        |
| GPIO_0   |         |         |         |             | PIN4 TX  |        |
| GPIO_1   |         |         |         |             | PIN5 RX  |        |
| GPIO_2   |         |         |         |             |          |        |
| GPIO_3   |         |         |         |             |          |  DATA  |
| GPIO_4   | Pin SCK |         |         |             |          |        |
| GPIO_5   | Pin DC  |         |         |             |          |        |
| GPIO_6   | Pin SDA |         |         |             |          |        |
| GPIO_7   | Pin CS  |         |         |             |          |        |
| GPIO_8   |         | Pin SDA | Pin SDA |             |          |        |
| GPIO_9   |         | Pin SCL | Pin SCL |             |          |        |
| GPIO_10  | Pin RES |         |         |             |          |        |
| GPIO_20  |         |         |         | UART_TxD    |          |        |
| GPIO_21  |         |         |         | UART_RxD    |          |        |