The **S1-C6-R** is a specific model of a **magnetic door/window contact sensor**, typically used in home automation and security systems. It is part of the "Smart" series, often associated with Zigbee or RF wireless protocols. Below is a breakdown of the electronic parts and specifications for this component. --- ### 1. Component Overview The S1-C6-R is a two-part device: the **Sensor (Main Body)** and the **Magnet**. It operates on the principle of a magnetic reed switch to detect the opening and closing of doors or windows. | Feature | Specification | | :--- | :--- | | **Communication Protocol** | Typically Zigbee 3.0 or 433MHz RF | | **Battery Type** | CR2032 Lithium Coin Cell | | **Operating Voltage** | 3V DC | | **Quiescent Current** | ≤ 5uA (Ultra-low power consumption) | | **Transmission Distance** | 30m - 50m (Internal/Open space) | | **Installation** | 3M Adhesive Tape or Screws | --- ### 2. Internal Electronic Parts The device consists of several key internal elements that allow it to function within a smart home ecosystem: #### A. The Reed Switch This is the heart of the device. It consists of two flexible metal reeds in a glass envelope. * **Function:** When the magnet (the smaller piece) is close, the magnetic field pulls the reeds together, closing the circuit. When the door opens, the field is lost, the circuit opens, and a signal is triggered. #### B. Microcontroller (MCU) A low-power MCU (often an 8-bit or 32-bit ARM Cortex-M0 based chip) manages the logic. * **Function:** It stays in "Sleep Mode" to save battery and wakes up instantly when the Reed Switch changes state to process the event. #### C. Wireless Transceiver Depending on the specific variant (Zigbee or RF): * **Zigbee:** Uses a 2.4GHz radio to communicate with a hub (e.g., Tuya, SmartThings). * **RF:** Uses a simple 433MHz transmitter to send a "fixed code" or "learning code" to a security panel. #### D. Antenna A small PCB trace antenna or a coiled wire antenna used to broadcast the signal to the gateway. --- ### 3. Circuit Operation Logic 1. **Standby:** The MCU is in deep sleep. The circuit consumes minimal micro-amps. 2. **Trigger:** The magnet moves away from the S1-C6-R body. The reed switch opens. 3. **Wake-up:** The hardware interrupt wakes the MCU. 4. **Transmission:** The MCU instructs the radio module to send a "Status: Open" packet to the controller. 5. **Confirmation:** If using Zigbee, it waits for an acknowledgment (ACK) from the hub before going back to sleep. --- ### 4. Comparison of Variants | Part Number Segment | Meaning | | :--- | :--- | | **S1** | Series identifier (often entry-level smart home) | | **C6** | Form factor / Case design code | | **R** | Indicates "Receiver" compatibility or "RF" (Radio Frequency) capability |