Datasheet

CircuitPython CPU

Temp

There is a CPU temperature sensor built into every ATSAMD21, ATSAMD51 and nRF52840 chips. CircuitPython makes

it really simple to read the data from this sensor. This works on the Adafruit CircuitPython boards it's built into the

microcontroller used for these boards.

The data is read using two simple commands. We're going to enter them in the REPL. Plug in your board, connect to

the serial console (https://adafru.it/Bec), and enter the REPL (https://adafru.it/Awz). Then, enter the following commands

into the REPL:

import microcontroller

microcontroller.cpu.temperature

That's it! You've printed the temperature in Celsius to the REPL. Note that it's not exactly the ambient temperature and

it's not super precise. But it's close!

If you'd like to print it out in Fahrenheit, use this simple formula: Celsius * (9/5) + 32. It's super easy to do math using

CircuitPython. Check it out!

Note that the temperature sensor built into the nRF52840 has a resolution of 0.25 degrees Celsius, so any

temperature you print out will be in 0.25 degree increments.

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