====== Design Doc ======

===== Sensor =====
  * [[https://www.airgradient.com/open-airgradient/instructions/pro-v9/|AirGradient]]
  * [[http://www.theghostbit.com/2015/06/controlling-honeywell-thermostat.html|Honeywell Thermostat]]
  * esp32/8266 and dht11/22
  * [[https://www.tindie.com/products/lspoplove/dstike-d-duino-32-v3/|DSTIKE D-duino-32 V3]]
  * DHT22
  * Ambient light sensor
  * barometric pressure
  * air quality VCFs