Usage:
./hvac_server.py./hvac_client.py./set_temp.py <temp>
Inputs:
- temperature
Outputs:
- heater
- cooler
Logic:
- if heater is on, then increase temp by 1
- elif cooler is on, then decrease temp by 1
- if temp < 70, then turn heater on
- elif temp > 70, then turn cooler on