Air Quality Sensor
This project runs on an ESP8266, using MQTT over Wifi to send the air quality and temperature information back to openHAB.
Software
Arduino project for ESP8266 board.
Wiring Schematic
Circuit Board
I used the OSH Park service to fabricate the board for this project, sending them just the board file.
Project Box
Designed in Autodesk Fusion 360, available on Thingiverse.
BOM
- ESP-01S Wifi microcontroller (something like this)
- Panasonic SN-GCJA5
- DS18B20 temperature sensor (TO92
- AMS1117 3pin stepdown breakout board (one of many to be found)
- 2x 4.7k Ohm resistors (no particular reason to use these)
- 2.54mm Pitch 2X4 8 Pin Female Double Row Straight Header PCB Connector (I used these)
- USB Micro B power connector (parallel or perpendicular to the board)
- 5v USB power supply (I just used one of the many that I have from dead cell phones and such)