The microcontroller used on the Preon32 radio module has a large number of interfaces. These can be used to control both sensors and actuators with different protocols. VIRTENIO offers a VariSen sensor module for the Preon32 Shuttle, which has been developed to fit the radio module and contains a large number of sensors for different measured variables.

In this example for the PreonVM, a digital sensor for magnetic fields (HMC5883L) is operated on one of the I2C interfaces. The driver allows a configuration, so that in this example a continuous detection of magnetic fields is carried out. In the course of the program, the magnetic field is recorded in 3-axes (X, Y, Z) at a time interval of 1000ms and output as a sensor value.

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