SpeedyBee Flight Controller — Onboard ELRS Feature Guide

This document explains how to use the onboard ELRS receiver feature in the SpeedyBee App, including turning power on/off, entering bind mode with one tap, following transmitter pairing instructions, and updating ELRS firmware.

1. Feature Overview

• Control the onboard ELRS receiver power directly from the app—no plugging/unplugging or disassembly needed.
• One-tap Bind mode for quick pairing with your transmitter.
• Built-in pairing guidance for different ELRS transmitters.
• Update the onboard ELRS receiver firmware to keep stability and performance at their best.

Requirements:

• Your flight controller supports an onboard ELRS receiver and is connected to the SpeedyBee App.
• Phone connection to the FC is stable; the FC is powered (battery or USB recommended).
• Your transmitter uses the ELRS protocol and is broadly version-compatible with the receiver.

2. UI Overview

Open App -> Device -> Onboard ELRS Feature:

• Central Power Button: Shows the current “Onboard ELRS Power” status; tap to toggle on/off.

• Three actions at the bottom:

  • Enter Bind: Puts the receiver into bind mode.
  • Transmitter Pairing Guide: Step-by-step pairing instructions for your radio.
  • Update ELRS Firmware: Flash/upgrade firmware on the onboard receiver.

3. Quick Start

1. Power the flight controller and connect it in the app.
2. Enter the “Onboard ELRS Feature” page.
3. Tap the central power button to turn “Onboard ELRS Power” on.
4. For first-time setup or rebind, tap “Enter Bind,” then open “Transmitter Pairing Guide” and follow the steps for your radio.
5. After a successful bind, quickly verify stick inputs before flying.

4. Detailed Steps

1) Turn On/Off Onboard ELRS Power

• On: Tap the power button; status changes to “On.” The receiver powers up and LEDs follow normal ELRS behavior.
• Off: Tap again; status changes to “Off.” Useful for troubleshooting, storage, or reducing heat/power draw.

Notes:

• If toggling fails repeatedly, check FC power, app connection, and permissions; restart the FC or app if needed.

2) One-Tap Bind

• With power “On,” tap “Enter Bind.”
• The receiver enters bind mode (LED typically fast-blinks; refer to ELRS behavior).
• Within 30–60 seconds, follow the “Transmitter Pairing Guide” to start binding on the transmitter.
• When binding succeeds, the receiver LED indicates link status (solid or slow blink), and you should see channel data in the app/OSD/GCS.

Common issues:

• Cannot enter bind: Power-cycle the receiver (off for 5 seconds, then on) and retry; update firmware if needed.
• Band/region mismatch: Ensure the transmitter and receiver match in region and frequency (e.g., 2.4G ELRS).

3) Transmitter Pairing Guide

• Tap “Transmitter Pairing Guide” to view steps for your brand/firmware.

• Typical flow (for reference; follow the guide page for exact steps):

  • On the radio’s ELRS Lua script or system menu, go to Receiver -> Bind.
  • Use a modest RF power level for indoor binding, wait for link confirmation.
  • Save/exit and verify channels.

4) Update ELRS Firmware

• Ensure the FC is connected, your phone has internet, and power is sufficient.
• Tap “Update ELRS Firmware,” select a target version, and start the update.
• Do not power off or leave the app during the process.
• After completion, it’s recommended to bind again to ensure version compatibility with the transmitter.

Risks & Tips:

• Updates briefly break the link; always test on the bench before flying.
• If an update fails, power-cycle the FC and retry; if it keeps failing, try a lower-speed mode or another cable/power source.

5. Post-Bind Checklist

• Channel inputs: In Betaflight/INAV Receiver tab, confirm Roll/Pitch/Yaw/Throttle respond correctly.
• Failsafe: Configure suitable packet rate, RF power, and failsafe behavior in ELRS; verify on the bench.
• Antenna: Ensure onboard/external antenna is firmly connected and clear of carbon/metal obstructions.
• Output protocol: Confirm FC UART and protocol settings match (CRSF/UART speed). If you used a preset/wizard, this may already be correct.

6. Troubleshooting Quick Reference

• App shows “Power Off” and won’t toggle:

  • Check FC power and app connection; try rebooting the FC.

• Cannot bind:

  • Make sure TX and RX ELRS versions are broadly aligned; update both to the same major line if needed.
  • Clear old bindings (bind phrase/model profile) on the transmitter and retry.

• Bound but no channels:

  • Check FC port mapping, receiver protocol (CRSF), and UART enablement.
  • Ensure the correct model is selected and the radio isn’t in simulator or output-inhibit mode.

• Unstable link/short range:

  • Check TX power, packet rate, antenna placement/orientation; avoid carbon or metal shadowing.
  • Verify regional settings to avoid underpowered or noncompliant operation.

7. Safety Notes

• Operate ELRS within legal frequency and power limits in your region.
• Perform firmware updates and binding on the bench; remove props or use prop locks.
• Before first flight, run a range test and failsafe test to ensure control and safety.

For more help, submit logs and a description via the app’s Help/Feedback, or contact official technical support.