Air-quality-sensor

Simple IoT system that measures air quality. Based on the RPi Pico W, written in MicroPython. Connected to the ThingSpeak cloud.

Hardware

• Raspberry Pi Pico W
• Grove - Laser PM2.5 Sensor (HM3301)
• MCP9700A analog temperature sensor

Default pinout

Raspberry Pi Pico W	HM3301
3V3 (OUT)	VCC
GND	GND
GPIO 4	SDA
GPIO 5	SCL
GPIO 0	SET
GPIO 1	RESET

Setup

• prepare config.json file and fill it with your credentials:

{
  "WIFI_SSID": "WiFi SSID",
  "WIFI_PASSWORD": "WiFi password",
  "API_KEY": "cloud api key"
}

• upload config.json and all python scripts to Pico W. After restarting, the main.py script will be executed