An external power controller requires a 12v power supply. This can include a vehicle/machine, a larger battery, or a solar battery system like the AJ25A from https://www.ajproductions.co.nz/products/trail-security-cameras/AJ25A-Solar-Panel-Kit. It can perform a number of different functions depending on its settings. The current list of functions include:
Monitor - Relays messages between other controllers and the sensorView phone app.
Gate - Single arm barrier gate controller
Master - Dual arm barrier gate that requires a slave controller
Slave - Dual arm barrier gate that requires a master controller
Repeater - Repeats messages between barrier controllers and a monitor controller to extend the distance of operation
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