'*' means 'complete'.

# Server

* Design API
* Implement web server

Implement GUI


# Sensor Station

* Design state machine
* Measure humidity
* Send humidity to server

Receive target humidity via bluetooth (or just buttons?)
Send target humidity to server


# HVAC Station

* Design state machine
* Receive humidity  from server
* PID algorithm to control DC
* Write DC to solenoid

Receive target humidity from server
Send DC to server