The **WSBS-16AA-R** is a specific electronic component categorized as a **Wireless Magnetic Door/Window Sensor**. It is primarily used in security systems, building automation, and IoT applications to detect the opening and closing of doors or windows. --- ## Technical Overview This device typically operates as part of a supervised wireless security network. Below are the core electronic characteristics: ### 1. Key Specifications | Feature | Description | | :--- | :--- | | **Detection Method** | Magnetic Reed Switch | | **Wireless Protocol** | Typically 433MHz or 868MHz (Region dependent) | | **Power Source** | Lithium Battery (often CR2032 or CR123A) | | **Operating Voltage** | 3.0V DC | | **Transmission Range** | 100 - 300 meters (Open space) | ### 2. Internal Electronic Components * **Reed Switch:** A small electrical switch operated by an applied magnetic field. When the magnet (mounted on the door) moves away from the sensor (mounted on the frame), the circuit opens, triggering a signal. * **RF Transmitter:** A low-power radio frequency module that sends encrypted data packets to the main control panel. * **Microcontroller (MCU):** A low-power processor that manages the sleep cycles, monitors the reed switch state, and handles the encoding of wireless signals. * **Tamper Switch:** A small internal button that triggers an alarm if the casing of the device is opened or removed from the wall. --- ## Operating Logic The device follows a specific electronic logic flow to ensure long battery life: 1. **Sleep Mode:** The device remains in a "deep sleep" state to conserve energy. 2. **State Change:** When the magnet moves, the Reed Switch changes state (Open to Closed or vice-versa). 3. **Interrupt:** The state change "wakes up" the MCU. 4. **RF Burst:** The MCU powers the RF transmitter and sends a status signal (including a unique ID) to the receiver. 5. **Supervision:** Periodically (e.g., every 60 minutes), the device sends a "Heartbeat" signal to ensure the system knows it is still functional and has sufficient battery. --- ## Application and Installation * **Security:** Used to trigger alarms when a perimeter is breached. * **Automation:** Can be linked to smart lighting (e.g., turn on hallway lights when the front door opens). * **Installation:** The sensor part is active (contains electronics), while the smaller part is a passive magnet. They must be aligned within a specific gap (usually < 15mm) to function correctly.