The **HORNET-S1M** is a professional-grade telemetry and remote control receiver module developed by RF Solutions. It operates primarily on the **868MHz** band (in the UK/EU) and is known for its high-security FM LoRa spread spectrum technology. --- ### ## Technical Specifications The electronics of the Hornet-S1M are designed for industrial reliability and long-range communication. | Feature | Specification | | :--- | :--- | | **Operating Frequency** | 868.35 MHz | | **Modulation** | FM / LoRa Spread Spectrum | | **Operating Voltage** | 12V - 32V DC/AC | | **Output Channels** | 1 (Single Relay) | | **Range** | Up to 2,000 meters (Line of Sight) | | **IP Rating** | IP68 (Waterproof Enclosure) | --- ### ### Core Electronic Components 1. **RF Receiver Transceiver:** The heart of the unit is a high-sensitivity RF engine. It utilizes **LoRa (Long Range)** modulation, which allows the signal to be picked up even below the noise floor, providing significantly better range than traditional FSK modules. 2. **Relay Output:** The board features a physical mechanical relay. This acts as a dry-contact switch (COM / NO / NC), allowing the user to switch high-power loads or trigger other electronic circuits. * **Max Switching:** 12A @ 230VAC / 10A @ 30VDC. 3. **Power Management:** The internal circuitry includes a wide-input voltage regulator. This allows the device to be powered by common industrial power supplies ranging from 12V to 32V without requiring external step-down converters. 4. **Security Logic (Pairing):** The electronics include a non-volatile memory chip used for the "Learn" process. It can store the unique digital IDs of multiple transmitters (usually up to 30) so that only authorized remotes can trigger the relay. --- ### ### Operational Modes The electronic jumpers or setup buttons on the PCB allow for three main functional modes: * **Momentary:** The relay stays active as long as the transmitter button is held. * **Latching:** Press once to turn ON, press again to turn OFF. * **Timed:** The relay activates for a pre-set duration (e.g., 0.5 seconds to 30 minutes) upon receiving a signal. --- ### ### Wiring Diagram Logic ```c // Typical Connection Logic [Power Source 12-32V] ----> [V+ / V- Terminals] [Load / Device] ----> [Common (COM)] [Load / Device] ----> [Normally Open (NO)] ``` ---