Starting with Machine Learning on devices like MCU - Part 21 (No Temp Sensor on Rev2 Arduino Nano BLE 33 board)

On the Rev 2 version of the Arduino Nano BLE 33 board, the Temperature and humidity sensor is not mounted as highlighted below.

So, in case we want to use the temperature sensor, we have to interface external sensor. We can use DHT11 sensor.

In case, you don't have DHT11 sensor handy, we can use the internal nRF52840 temperature sensor. The problem here is the nRF chip itself includes an on-die temperature sensor (it is less accurate and reflects chip temperature, not ambient air).