LM-SM: Magnetic sensor with magnet

Using the Bluetooth technology, the transmitter and receiver do not need visual contact with a range of several meters. 

Subsequently, even after decoupling, the outputs are still controlled and switched on. 

Using a magnetic sensor this drawback can be solved. In this case the Bluetooth connection is only built up, when a magnet is near the sensor. 

The magnetic sensor must be activated in the LM-Teacher. 

At a semitrailer the magnet is fixed below the fifth wheel.