Bluetooth magnetic contact function

The basic function of magnetic contacts is to tell us the status of the door or window in which we have placed them, i.e. whether it is open or closed. The technology they use to send this information is Bluetooth. In order for this information to be sent to the application, it needs to be received by a second device that communicates with the Internet. Usually what we recommend as a solution is the GPISense device. Basically, the GPISense device works like a central hub that receives the signal from the magnetic contacts we have in our room and sends it as information to the application. The range at which the magnetic contacts can transmit the signal is up to 100 metres in free field, meaning there is a line of sight to the node. 

The magnetic contacts consist of two parts, a large one which is usually placed on the fixed side of the door, i.e. the frame, and a smaller one which is placed on the moving side of the door, i.e. the leaf. In order for the contact to work effectively, we must ensure that these two parts are at least 1 cm and no more than 4 cm apart when the door is closing. They must also be at the same height and in the same straight line. Position them using double-sided tape. At the back of the large contact piece is a switch that must be pressed when the device is stuck. This switch tells us that the device is in place and has not moved. The device is battery powered and the battery life is approximately two years.