SoloGood ELRS 2.4G Receiver Instruction Manual

1. Introduction

The SoloGood ELRS 2.4G Receiver is an open-source ExpressLRS (ELRS) radio control link designed for RC applications, particularly FPV racing and long-distance cruising. ExpressLRS prioritizes optimal link performance, offering low latency, high refresh rates, and extended range capabilities. This receiver is ultra-light and ultra-small, making it suitable for compact drone builds.

Package Contents

• 1 x ELRS 2.4G Receiver
• 1 x T-type Antenna
• 1 x Pin Header 1x4
• 1 x User Manual (this document)

Figure 1: Contents of the SoloGood ELRS 2.4G Receiver package.

Figure 2: Detailed view of the ELRS 2.4G Receiver board.

Figure 3: Receiver size comparison in hand.

2. Setup and Installation

2.1 Physical Connection

Connect the included T-type antenna to the IPEX MHF connector on the receiver board. Ensure a secure connection to maintain optimal signal integrity.

Figure 4: Receiver with antenna attached.

2.2 Wiring to Flight Controller (FC)

Carefully solder the receiver to your flight controller. Pay close attention to the correct pin assignments, as incorrect wiring can damage components. The receiver requires a 5V input voltage.

• VCC: Connect to 5V on the Flight Controller.
• GND: Connect to Ground on the Flight Controller.
• TX: Connect to an available RX pad (e.g., FC RX1) on the Flight Controller.
• RX: Connect to an available TX pad (e.g., FC TX1) on the Flight Controller.

Figure 5: ELRS Receiver Pinout.

Figure 6: Flight Controller to ELRS Receiver Wiring Diagram.

2.3 Firmware Flashing and Binding

The receiver requires firmware flashing and binding to your ExpressLRS transmitter module. The recommended target for this receiver is BetaFPV Nano 2.4G. Firmware updates can be performed via WiFi, an FTDI adapter, or through the flight controller's passthrough function.

After wiring, configure your flight controller software (e.g., Betaflight) as follows:

1. In the Ports tab, enable Serial Rx for the UART connected to your receiver (e.g., UART3).


Figure 7: Betaflight Ports Tab Configuration.

2. In the Receiver tab, set Receiver Mode to 'Serial-based receiver' and Serial Receiver Provider to 'CRSF'.

Figure 8: Betaflight Receiver Tab Configuration.

For detailed binding instructions, refer to the official ExpressLRS documentation or community resources, as the process can vary slightly with firmware versions.

3. Operating Instructions

Once the receiver is correctly installed, flashed with compatible firmware, and bound to your transmitter, it will begin receiving control signals. The receiver's LED indicator (if present) will typically show its status:

• Solid LED: Indicates a successful connection and active link with the transmitter.
• Flashing LED: May indicate binding mode or a lost connection. Refer to your specific ExpressLRS firmware documentation for exact LED patterns.

Ensure your flight controller is configured to interpret the CRSF protocol from the receiver for proper drone control.

4. Maintenance

To ensure the longevity and reliable performance of your ELRS receiver, consider the following maintenance tips:

• Antenna Protection: The T-type antenna is crucial for signal reception. Protect it from propeller strikes and physical damage. Consider mounting it in a location that minimizes exposure.
• Firmware Updates: Regularly check for new ExpressLRS firmware releases. Updates often include performance improvements, bug fixes, and compatibility enhancements.
• Cleanliness: Keep the receiver board free from dust, dirt, and moisture. Use compressed air or a soft brush for cleaning if necessary.

5. Troubleshooting

If you encounter issues with your SoloGood ELRS 2.4G Receiver, refer to the following common problems and solutions:

• Receiver gets hot and loses connection:
  This can indicate excessive current draw or a short circuit. Double-check all wiring for correct polarity and ensure no solder bridges are present. Verify the input voltage is stable 5V.
• Difficulty with WiFi flashing:
  WiFi flashing can sometimes be unreliable due to interference or signal strength. Try performing firmware updates using an FTDI adapter or through Betaflight/INAV passthrough, which often provides a more stable connection.
• No signal or binding issues:
  
  • Verify that the RX and TX wires are correctly connected (RX on receiver to TX on FC, and TX on receiver to RX on FC).
  • Ensure the correct ExpressLRS firmware target (BetaFPV Nano 2.4G) is used for flashing.
  • Confirm that the UART for the receiver is enabled for Serial Rx in your flight controller software (e.g., Betaflight Ports tab).
  • Check that the Receiver Mode is set to 'Serial-based receiver' and Serial Receiver Provider to 'CRSF' in your flight controller software.
  • Ensure your transmitter module is also running a compatible ExpressLRS firmware version and is in binding mode when attempting to bind.
• Poor range or intermittent signal:
  Check the antenna connection for looseness or damage. Ensure the antenna is mounted clear of carbon fiber frames or other conductive materials that can block the signal.

6. Specifications

Figure 9: Receiver weight measurement.

7. Warranty and Support

SoloGood offers lifetime friendly customer service. If you are not satisfied with the product or encounter any issues not covered in this manual, please contact our support team for assistance. Provide your purchase details and a clear description of the problem to facilitate a quick resolution.