So I have my Raspberry Pi 3 up and running for about 2 days now. It's running 3 small scripts in the background continuously, which have minimal impact on the CPU. I've never seen the CPU usage go above 2%; it always maintains 0-1%.
On the first day the Pi was running at about 50°C. After sometime, it stabilised to 53°C the entire day. The next morning I checked the temperature and it was around 58°C. I then checked the CPU usage and it still maintained the 0-1% usage.
I then decided to get heatsinks and monitor the temperatures. It was still the same; nothing had changed. I assumed it had something to do with the power supply, but I confirmed that the power supply gave a stable 5.12V for about 10 min. I'm using a fast charger and the supply is rated at 5V 2.0A. So I'm assuming there's no leaking current causing thermal damage to the chip.
My room temperature is around 40°C. I'm sure even at this temperature, the Pi shouldn't have such severe temperature spikes.
This is my RPI3 setup:
- It's running the latest version of Raspbian.
- It's connected to LAN and WiFi.
- I haven't disabled the WiFi yet.
- One of the GPIOs is used to continuously send HIGH/LOW signal to a relay. 98% of the time the GPIO is sending LOW so there's not much current draw either.
- None of the USB ports are used
- the HDMI port is unused.
So what seems to be the problem?