The door sensor supported by Viva is supplied by Popp (Leedarson). It detects the opening and closing of doors and windows using a magnet. The protocol used is Zigbee and the device works on battery.
Installation of a door sensor is done by selecting Devices from the menu in the Viva app, clicking Install new... and selecting the Door sensor from Popp.
Once a device is installed, it can be deleted by selecting the correct door sensor from the list under Devices, selecting Delete and following the instructions.
If a devices is unresponsive, or the gateway is no longer available, the device can be factory reset using the following process: Push the pin-hole button for 5 seconds.