Refrigeration controller

Job ID: 37718730

Budget: $30 – $250 USD

The task is to program a refrigeration controller in Arduino.

Inputs:
two temperature sensors
digital input for freely programmable functions (comp on/off, fan on/off, both on/off, alarm on/off, remote shutdown)

Outputs:
Three relays 12A (comp / fan / defrost)
One alarm relay (temperature or personal alarm)

The following points must be fulfilled:
- Temperature sensor must be selectable between pt100/pt1000/ntc/ptc
- Defrosting as an interval / example, defrosting should be started every 8 hours
- Two different defrosting types (circulating air fan on, defrost off or heating fan off/defrost on)
- Defrost end temperature (t2)
- Temperature alarm (deviation from setpoint)
- Alarm delay can be changed in minutes
- Fan standstill after defrosting
- Fan start temperature
- Sensor corrections 1&2
- Activation of sensor 2
- IOT / WLAN integration
- https control for mobile app/ website