Rx and Tx are bound but no inputs detected

Hi everyone, been struggling with this for a while and can't figure it out.

Setup:

• FC: SpeedyBee F405 V3
• Receiver: SpeedyBee Nano 2.4GHz ELRS
• Radio: (ELRS)
• Betaflight 4.x

Problem: Receiver binds successfully (solid LED), radio connects, but in the Receiver tab in Betaflight absolutely nothing moves. No channel input whatsoever.

CLI status output:

RX rate: 0
Arming disable flags: RXLOSS CLI MSP

What I've tried:

1. Serial RX on wrong UART - Originally had the receiver wired to R6/T6 (UART6) but Serial RX was configured on UART3. UART3 is occupied by VTX so I can't move wires there.
2. Moved Serial RX to UART6 via CLI:

​

serial 2 0 115200 57600 0 115200
serial 5 8192 115200 57600 0 115200
save

1. Receiver provider set to CRSF, Receiver Mode set to Serial (via UART)
2. Wiring - TX of receiver to R6, RX of receiver to T6 on the FC
3. Binding - Done via bind_rx in CLI, solid LED confirms successful bind

Still getting RX rate: 0 and no movement in Receiver tab.

Anyone have any ideas what I'm missing? Is there something specific about UART6 on the F405 V3 that would prevent it from working as Serial RX? Could it be a wiring issue even though LED is solid?

Any help appreciated!

[HELP] SpeedyBee Nano 2.4GHz ELRS RX - solid LED but zero channel movement in Betaflight after ELRS 4.0.0 update

Hi everyone, been struggling with this for a while and can't figure it out.

Setup:

• FC: SpeedyBee F405 V3
• Receiver: SpeedyBee Nano 2.4GHz ELRS
• Radio: (ELRS)
• Betaflight 4.x

Problem: Everything was working fine until I updated to ELRS 4.0.0. After the update, the receiver binds successfully (solid LED) and the radio connects, but in the Receiver tab in Betaflight absolutely nothing moves. No channel input whatsoever.

CLI status output:

RX rate: 0
Arming disable flags: RXLOSS CLI MSP

What I've tried:

1. Serial RX on wrong UART - Originally had the receiver wired to R6/T6 (UART6) but Serial RX was configured on UART3. UART3 is occupied by VTX so I can't move wires there.
2. Moved Serial RX to UART6 via CLI:

​

serial 2 0 115200 57600 0 115200
serial 5 8192 115200 57600 0 115200
save

1. Receiver provider set to CRSF, Receiver Mode set to Serial (via UART)
2. Wiring - TX of receiver to R6, RX of receiver to T6 on the FC
3. Binding - Done via bind_rx in CLI, solid LED confirms successful bind

Still getting RX rate: 0 and no movement in Receiver tab.

Important note: This all worked perfectly before the ELRS 4.0.0 update. I'm wondering if the update changed something — maybe the binding phrase format, UART baud rate, or protocol changed in 4.0.0?

Anyone who has gone through the 4.0.0 update and had similar issues, any help appreciated!