The humidity sensor module HSM 100 extends the functionality of STM 33x temperature sensor modules. HSM 100 contains an internal calibrated humidity sensor. It can be plugged onto STM 33x modules via a 20 pin connector. The sensor signal is read via the ADIO3 input of STM 33x. In order to be able to read the sensor signal STM 33x has to be configured to an EEP supporting humidity. This can be done via Dolphin Studio.