Homie Room Sensor

located in IKEAs Vindriktning

after this upgrade it will measure:

• air quality
• temperature
• pressure
• altitude

The system can be powered by USB-C or Micro-USB, attached at ESP8266 board.

Filesystem

Configuration

Use the config-example.json from the host folder and create here a config.json file.

HowTo upload

Start Platform.io Open a new Atom-Terminal and generate the filesystem with the following command : pio run -t buildfs Upload this new generated filesystem with: pio run -t uploadfs

Command pio

Can be found at ~/.platformio/penv/bin/pio

Hardware

ESP8266 version ESP12 was used.

The prototype was based on the Witty board

REST         |       TXD
ADC    LDR   |       RXD
CH_PD        |       GPIO05
GPIO16       | BTN   GPIO04
GPIO14       |       GPIO00
GPIO12 RGB-G |       GPIO02
GPIO13 RGB-B | RGB-R GPIO15
VCC          |       GND
            USB

The following pins are used:

• GPIO4 PM1006 particle sensor PIN REST on Vindriktning board
• GPIO2 WS2812 stripe out of three LEDs, replacing the original LEDs at front
• GPIO15 Red LED (optional)
• GPIO12 Green LED (optional) Used as 3.3V Supply for the I2C sensor
• GPIO13 Blue LED (optional)
• GPIO13 VCC of I2C (3.3 V)
• GPIO14 I2C clock
• GPIO5 I2C data pin

Bill of materials

• IKEA Vindriktning
• ESP8266 (e.g. Witty board)
• BMP280 sensor
• some wire

Sources

For the Witty board

• [https://github.com/amkuipers/witty Witty pinout]
• [https://arduino.ua/products_pictures/large_AOC361-5.jpg Schematics]