DarwinFPV Cement Ultra Durable ELRS 2.4G Receiver, IP67 Waterproof/Dustproof, 100mW PA, CRSF

Overview

DarwinFPV “Cement” Ultra Durable ELRS 2.4G Receiver is a potted receiver designed for FPV drone use in harsh environments such as dust, rain, snow, water, and mud. It integrates anti-reverse power connection protection, an IP67 waterproof and dustproof rating, and a built-in 100mW power amplifier (PA) for a stable control link.

For pre-sales and technical support, contact https://rcdrone.top/ or email support@rcdrone.top.

Key Features

• IP67 waterproof and dustproof: Ultra-high dustproof and waterproof performance; helps resist metal particles, fine sand and gravel, weeds or dew; suitable for weather conditions such as rain and snow.
• Anti-reverse connection of power supply: Built-in protection module; the receiver will not be burned even if the power wire is reversed.
• Built-in 100mW power amplifier (PA): Telemetry output (RSSI signal is stable), longer distance, better sensitivity, and stronger anti-interference ability.
• Betaflight remote control FC support: Using the ELRS open source project, FC parameters can be adjusted through Betaflight.

Specifications

What’s Included

• DarwinFPV “Cement” Ultra Durable 2.4G Receiver x1
• Silicone cable (length 70mm) x1
• Transparent heat shrink tube (length 50mm, diameter 14mm) x1

Wiring & Setup

FC Wiring (CRSF)

• GND to FC GND
• 5V to FC 5V
• TX to FC RX
• RX to FC TX

Betaflight Configuration

• In Betaflight Configurator, open the Ports tab and enable the corresponding UART as Serial Rx. Save and reboot.
• In the Receiver tab, set Receiver Mode to Serial (via UART), then set Serial Receiver Provider to CRSF.

Binding Method

1. Power the receiver on and off for 3 consecutive times (within 1 second interval).
2. The LED flashes twice, indicating the receiver has entered binding mode.
3. Put the TX module or the remote controller into binding state. When the LED becomes steady on, binding is successful.

Indicator Light States

• Green light always on: Bind successfully
• Green light double flash: Entered bind mode
• Green light flashing slowly: No TX module signal connection
• Green light flashing quickly: Entered WiFi mode

Details

Built for harsh flying conditions, the potted Cement receiver is rated IP67 to help resist dust, rain, snow, and splashes.

Anti-reverse power protection helps prevent damage if the power leads are accidentally connected backwards.

A built-in 100mW PA is designed to support a more stable control link with improved sensitivity and interference resistance.

Wire the receiver to your FC using CRSF: GND to GND, 5V to 5V, and cross TX/RX between the receiver and UART.

Use the green LED patterns to confirm bind status, troubleshoot signal loss, or enter WiFi mode for configuration.