BAYCKRC ELRS 2.4GHz Nano Receiver

Introduction

The BAYCKRC ELRS 2.4GHz Nano Receiver is an advanced, open-source receiver designed for FPV (First Person View) racing drones and long-range FPV cruising. Based on the ExpressLRS protocol, this ultra-light and ultra-small receiver offers low latency and a high refresh rate, making it ideal for demanding flight applications. Its compact design simplifies installation in micro drones and other FPV kits.

Key features include:

• Open-source ExpressLRS protocol compatibility.
• ESP8285MCU for reliable performance.
• Firmware upgradeable via Wi-Fi for convenience.
• Low latency and high refresh rate (up to 500Hz).
• Ultra-lightweight (0.6g) and compact design.
• Built-in TCXO for stable frequency performance.

Figure 1: The BAYCKRC ELRS 2.4GHz Nano Receiver with its T-shaped antenna, showcasing its compact form factor.

Safety Information

To ensure safe operation and prevent damage to the receiver or other components, please observe the following safety guidelines:

• Keep the receiver away from heat sources. Excessive heat can damage internal components.
• Ensure correct voltage supply (3.6-5.5V). Supplying incorrect voltage can lead to permanent damage.
• Handle with care to avoid electrostatic discharge, which can harm sensitive electronic components.
• Always disconnect power before making or changing connections.

What's in the Box

Upon opening the package, you should find the following components:

• 1x BAYCK 2.4GHz Nano RX Receiver
• 1x T-type Receiver Antenna
• 2x Heat Shrink Tubes
• 1x SH1.0 Locking Plug with 4x 30AWG Silicone Wires (1 black, 1 red, 1 white, 1 yellow)

Figure 2: All components included in the package, ready for assembly.

Specifications

Detailed technical specifications for the BAYCKRC ELRS 2.4GHz Nano Receiver:

Figure 3: Visual representation of the receiver's specifications and a basic wiring diagram.

Setup

Setting up your BAYCKRC ELRS Nano Receiver involves physical connection to your flight controller and firmware configuration. Ensure your flight controller supports the CRSF protocol.

1. Physical Connection

Connect the receiver to your flight controller using the provided wires. The standard connections are:

• GND (Black wire): Connect to a Ground pad on your flight controller.
• 5V (Red wire): Connect to a 5V power pad on your flight controller.
• TX (White wire): Connect to an RX (Receiver) pad on a UART of your flight controller.
• RX (Yellow wire): Connect to a TX (Transmitter) pad on the same UART of your flight controller.

Figure 4: Detailed wiring diagram for connecting the receiver to a flight controller, illustrating the GND, 5V, TX, and RX connections.

2. Firmware and Binding

The receiver's firmware can be updated via Wi-Fi, simplifying the process. For binding, ensure your ELRS 2.4GHz TX module (transmitter) and the receiver have the same binding phrase and configuration options (Regulatory Domain, Performance options, and Extra Data). Once powered, if the remote control is not turned on or after approximately 60 seconds, the receiver will automatically enter Wi-Fi mode, indicated by a flashing LED, allowing for easy firmware updates.

Figure 5: Front and back views of the receiver board, showing the ESP8285 MCU and other components.

Operating

Once properly set up and bound, the BAYCKRC ELRS Nano Receiver provides a robust and responsive link for your FPV drone. Its low latency and high refresh rate are crucial for precise control during FPV racing and stable long-range flights.

The receiver operates on the CRSF protocol, which is widely supported by modern flight controllers like Betaflight. Ensure your flight controller's UART is configured for Serial RX and set to CRSF protocol.

Maintenance

The BAYCKRC ELRS Nano Receiver is designed for durability, but proper maintenance can extend its lifespan and ensure consistent performance:

• Keep Clean: Regularly inspect the receiver for dust, dirt, or debris. Use a soft brush or compressed air to gently clean the board.
• Protect from Elements: While heat shrink tubing provides some protection, avoid exposing the receiver to moisture, extreme temperatures, or direct sunlight for prolonged periods.
• Secure Connections: Periodically check all wire connections to ensure they are secure and free from fraying or damage. Loose connections can lead to signal loss.
• Antenna Care: Ensure the antenna is not bent sharply or damaged. A damaged antenna can significantly reduce range and signal quality.

Troubleshooting

If you encounter issues with your BAYCKRC ELRS Nano Receiver, consider the following troubleshooting steps:

• No Link/Binding Issues:
  • Verify that both the receiver and your ELRS TX module are on the same firmware version and have identical binding phrases.
  • Ensure the receiver is powered correctly (3.6-5.5V).
  • Check if the receiver's LED is flashing, indicating it's in Wi-Fi mode for binding/firmware update.
• Intermittent Signal/Short Range:
  • Inspect the antenna for any damage or kinks. Ensure it is properly connected to the IPEX1 connector.
  • Check for sources of interference near the receiver or antenna.
  • Ensure the antenna is positioned optimally, away from carbon fiber frames or other conductive materials that can block signals.
• Receiver Not Detected by Flight Controller:
  • Double-check the wiring connections (GND, 5V, TX, RX) to ensure they are correct and secure.
  • Verify that the correct UART on your flight controller is enabled for Serial RX and set to CRSF protocol in your flight controller software (e.g., Betaflight Configurator).
  • Ensure the flight controller firmware is up-to-date and compatible with ELRS.
• Overheating:
  • Ensure adequate airflow around the receiver.
  • Verify the input voltage is within the specified range (3.6-5.5V).

Warranty and Support

For any further information, technical assistance, or warranty inquiries regarding your BAYCKRC ELRS 2.4GHz Nano Receiver, please contact us. We are committed to providing prompt support and will endeavor to reply to your queries within 24 hours.