# 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

# Webserver

This version has a webserver activated, if MQTT server is set to **localhost**.

Every 20 seconds a measurement is performed.
This is shown in a diagram via chart.js

# Sources
For the Witty board
* [https://github.com/amkuipers/witty Witty pinout]
* [https://arduino.ua/products_pictures/large_AOC361-5.jpg Schematics]
* [https://www.chartjs.org/docs/latest/getting-started/integration.html]