# Need helps on RC setup for Sentinel/VOXL2

Source: https://forum.modalai.com/topic/2182/need-helps-on-rc-setup-for-sentinel-voxl2
Category: Development Drones (https://forum.modalai.com/category/44/development-drones)
Tags: sentinel
Posted: 2023-05-23 02:27:55 UTC by Neil Huang
Replies: 4 · Views: 746

## Neil Huang · 2023-05-23 02:27:55 UTC

Hello there,

I would like to know whether I am able to setup the `CRSF_RAW` mode connection for Sentinel with TBS transmitter and TBS Crossfire Nano Rx? 

Every time I used the command `px4-listener input_rc` to check, it is always returning `never published`.

By following the connection of the technical doc in https://docs.modalai.com/voxl2-rc-configs/#crsf, I could bind to the receiver and successfully arm the drone by using the TBS Crossfire receiver in `CRSF_MAV` mode.

## Reply by Eric Katzfey (ModalAI staff) · 2023-05-23 19:36:55 UTC

@Neil-Huang In theory, yes. But why don't you want to use mavlink? For CRSF to work you would need to reconfigure the TBS portion correctly for CRSF and set baud rate on the VOXL2 UART to match what the TBS HW is using.

## Reply by Neil Huang · 2023-05-24 01:12:28 UTC

@Eric-Katzfey Thanks for the advise, how could I check the current baud rate setting on voxl2 uart?

Since I just got the sentinel recently, simply want to explore what options could I have for the drone, and if I possible I would not like to change my settings on TBS transmitter every time when bind to sentinel.

## Reply by Neil Huang · 2023-05-24 05:49:43 UTC

Did you mean changing the baudrate in the start script for the following line `qshell tbs_crossfire start -c -p 7 -b 250000` to match the setting on the tbs side?

## Reply by Eric Katzfey (ModalAI staff) · 2023-05-24 16:12:22 UTC (in reply to Neil Huang)

@Neil-Huang Yes, if TBS side doesn't use 250000 then that line would need to be changed.