CPU Cooling

With intense use, the CPU may heat up, especially if it is mounted without a heat sink. If 65 ° C is exceeded,one GPIO pin goes to 1 to control the power on of a fan.

pin 7: Orange Pi Zero 2
pin 12: Orange Pi One Plus
pin 7: Raspberry 4B
After 30s of inactivity, no more web client connected, radio signal processing stops, CPU temperature drops rapidly.

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