Note: When you connect the receiver to Toothpick F4 2-4S AIO Brushless FC, please don't forget to plug the battery, otherwise the reciver will not work at all because if you don't plug the battery, the reciver doesn't have any power to work.


Receiver Connection


1) How to connect a receiver with SBUS signal output (Frsky XM+ / AC900 Dual Mode Receiver (FrSky & FUTABA) for example).


Here is the connection diagram with Frsky XM+ receiver.

Here is the connection diagram with Futabe-X-BOSS AC900 receiver. 


Step 1, on Betaflight GUI, configure the UART2 port to serial port in Ports tab. Then click the Save and Reboot button in the lower right corner. 

Step 2, in the Configuration tab, for Receiver Mode, choose Serial_based receiver (SPEKSAT, SBUS, SUMD); Serial Receiver Provider, choose SBUS. And click the Save and Reboot button in the lower right corner.


2) How to connect a receiver with DSMX signal output.


Here is the connection diagram with DSMX FullSpeed receiver

Step 1, on Betaflight GUI, configure the UART2 port to serial port in Ports tab. Then click the Save and Reboot button in the lower right corner.

Step 2, in the Configuration tab, for Receiver Mode, choose Serial_based receiver (SPEKSAT, SBUS, SUMD); Serial Receiver Provider, choose SPEKTRUM2048. And click the Save and Reboot button in the lower right corner.


3) How to connect a receiver with TBS Crossfire signal output (TBS Crossfire Nano Rx for example).


Here is the connection diagram with TBS Crossfire receiver. 

Step 1, on Betaflight GUI, configure the UART2 port to serial port in Ports tab. Then click the Save and Reboot button in the lower right corner. Step 2, in the Configuration tab, for Receiver Mode, choose Serial_based receiver (SPEKSAT, SBUS, SUMD); Serial Receiver Provider, choose CRSF . Don’t forget to enable “Telemetry” feature too before pressing “Save”. For more details about how to use TBS crossfire receiver, check TBS CROSSFIRE SETUP WITH BETAFLIGHT on OscarLiang. 


4) How to connect a receiver with Flysky IBUS signal output (Flysky FS-RX2A for example).


Here is the connection diagram with FS-RX2A receiver. 

Step 1, on Betaflight GUI, configure the UART2 port to serial port in Ports tab. Then click the Save and Reboot button in the lower right corner.


Step 2, in the Configuration tab, for Receiver Mode, choose Serial_based receiver (SPEKSAT, SBUS, SUMD); Serial Receiver Provider, choose IBUS. And click the Save and Reboot button in the lower right corner.



5) How to connect a receiver with Frsky-R-XSR signal output.


1 Please use the F-port function. Before using it, upgrade the receiver firmware to support Fport.

Click here to download the firmware.



2 Here are the connection diagrams of Frsky R-XSR receiver with F4 2S AIO Brushless FC.

3 How to set BETAFLIGHT


Step 1. On the Betaflight GUI, configure the UART2 port as a serial port in the Ports tab. Then click the "Save and Restart" button in the lower right corner. 


Step 2. On the "Configuration" tab, " for Receiver Mode, choose Serial_based receiver (SPEKSAT, SBUS, SUMD); For Serial Receiver Provider, choose Frsky FPort. Then turn on TELEMETRY. And click the Save and Reboot button in the lower right corner. 




Step 3. On the "Receiver" tab, choose "Disabled" for RSSI Channel. And click the Save and Reboot button in the lower right corner. 



Step4:In the CLI tab, input command: 

set serialrx_halfduplex = ON 

set serialrx_inverted = OFF

save



Note: The RSSI signal cannot be seen on the BETAFLIGHT, it can be seen on the OSD info. If you cannot see it on OSD info, please set an channel on your transmitter, such as : AUX12.