What is it? The FarCrypt LR-25 Mesh is a high-security, long-range wireless activation system built around the ESP-12E Wi-Fi module powered by the Espressif Systems ESP8266EX chip, and the Ebyte E32-433T30D LoRa module. It enables secure remote triggering of low-voltage circuits over distances exceeding 25 km, with the ability to connect one transmitter to virtually unlimited receivers. Receivers remain in listening mode, and only those with the matching code execute the command.

The system is ideal for hobbyist electronics, model rocketry, remote lighting, outdoor automation, and other low-voltage applications that require reliability, encryption, and extreme range.

Why did you make it?

Most remote control systems either have long range but no security, or high security but limited range. The LR-25 Mesh combines both, adding the flexibility of mesh networking to bypass obstacles and maintain connectivity even without a line of sight.

What makes it special?

• Espressif Systems ESP8266EX (ESP-12E) – Reliable Wi-Fi microcontroller from Espressif Systems, providing smart control and wireless configuration.
• Ebyte E32-433T30D LoRa module – Achieves 25 km+ range at 433 MHz, ensuring long-distance communication.
• AES-256 encryption – All transmissions are secured with AES-256, making it impossible to intercept or spoof commands.
• Mesh networking – Receivers form a self-healing mesh, extending range and bypassing obstacles.
• Virtually Unlimited Receivers – The system supports unlimited receivers; the companion Android app currently pairs up to 10 receivers.
• Hydraulic Arming Device for Extra Safety – A purely mechanical-hydraulic safety unit: Spring slowed by viscous fluid through a micro-channel for up to 3 minutes delay. No electronics — tamper-proof and ultra-reliable. Inspired by the legendary Soviet MUV-4 safety device. Manufactured with high-resolution SLA resin 3D printing.

⚠️ Sold separately as an optional safety accessory. The PCB includes two dedicated solder pads for connecting the optional Hydraulic Arming Device for extra safety. If the Hydraulic Arming Device is not used, the receiver will be shipped with the arming pads factory-shortened (jumpered) to ensure normal operation.

• Ultra-low detectability – LoRa messages are ultra-short and transmitted at the noise level, making detection extremely difficult.
• Safe electrical isolation – The trigger circuit is isolated from receiver logic via an optocoupler, providing a max 3.7V / 4A output.
• Expandable control – Can drive a small relay to control higher voltages if required.
• Android app – Full control, pairing, and monitoring in one interface.
• Feedback system via app: Receiver connection status Transmitter battery voltage Error report if the trigger signal fails to reach the load circuit
• USB charging – The transmitter uses an 18650 Li-ion battery, rechargeable via standard phone chargers.

Power setup Transmitter — single 18650 Li-ion battery (USB chargeable) Receiver — two 18650 Li-ion batteries (one for receiver logic, one for trigger circuit)

Applications - Model rockets and hobbyist launch systems (low-voltage only) - Remote lighting and LED effects - Outdoor automation and remote sensors - Mesh-based long-distance control for robotics projects

Safety Notice This device is intended for low-voltage hobbyists and educational use only. Do not use with prohibited, hazardous, or explosive devices. Always follow local laws and regulations.

Package Contents

• Base Package — Includes 1× Transmitter (TX) + 1× Receiver (RX), both with antennas, USB charging cable, and basic documentation.
• Extra Receiver Unit — Optional add-on. Requires a transmitter to operate. Perfect for expanding your network to control multiple receivers.

Each receiver operates independently but can be linked to the same transmitter. Add as many receivers as needed for your project.

Packaging & Enclosure

We ship the system as a fully assembled PCB with all electronic components professionally soldered in place. This ensures reliability and ease of use right out of the box.

The PCB is delivered without an enclosure by default, keeping the price lower and giving advanced users flexibility for integration.

For those who prefer a ready-to-use solution, we also offer optional enclosures for both the transmitter and receiver. These cases are 3D-printed with high precision, providing durability and a clean, professional look.

📱 App Download & Installation

Our Android control app allows you to pair, configure, and monitor your FarCrypt LR-25 system directly from your smartphone.

Download link(copy & paste into your browser):

https://drive.google.com/file/d/17mwMCjBAUDfKOz2W21hUzos4bCa9yPTc/view?usp=sharing

Installation steps: - Download the APK file to your Android device. - If prompted, enable “Install from unknown sources” in your phone’s security settings. - Open the APK file and follow the installation prompts. - Launch the app and connect to your transmitter via Wi-Fi.