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Protection


Using NTC you can protect the unit from overheating by setting a temperature limit, and if unit temperature exceeded the limit, all your loads will be turned OFF automatically and a notification will be sent to you.

CADIO App

NTC Protection​

  • Set the NTC temperature limit.

NTC GPIO​

  • Set GPIO for the NTC.
    • In ESP8266, NTC GPIO is A0 because it has only one analog input GPIO.
    • In ESP32, you can select any analog input GPIO you want.

NTC wiring​

  • Pullup

    • NTC is wired between NTC GPIO and GND.
    • 10K pullup resistor is wired between NTC GPIO and 3v3.

  • Pulldown

    • NTC is wired between NTC GPIO and 3v3.
    • 10K pulldown resistor is wired between NTC GPIO and GND.

Fan GPIO​

If you need a cooling fan you can set a GPIO for it.

Cooling fan temperatures

The cooling fan will be turned ON when NTC temperature is above 40°C, and will be turned OFF when NTC temperature is below 35°C.