There are several ways to control a parking barrier gate using a cellphone:   1. Using a mobile app: Many barrier gate manufacturers offer mobile apps that allow you to control the gate from your smartphone. These apps typically use Bluetooth or Wi-Fi to connect to the gate and allow you to open, close, and monitor the gate remotely.   2. Using a smart home system: If your ...

  Photocell are sensors that detect light. When they are used with barrier gates, they work by triggering the gate to open or close when a certain level of light is detected.    Here's how it works:   1. When the photocell is exposed to light, it generates an electrical signal. 2. This signal is sent to the control unit of the barrier gate. 3. The control unit then activates th...