# QGroundControl Not Connecting via Telemetry Radio (UART2)

**URL:** <https://discuss.px4.io/t/qgroundcontrol-not-connecting-via-telemetry-radio-uart2/43926>\
**Category:** QGroundControl\
**Created:** [February 24, 2025, 10:38am UTC](https://discuss.px4.io/t/qgroundcontrol-not-connecting-via-telemetry-radio-uart2/43926 "2025-02-24T10:38:01Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Arthur\_Hanusse\_Becke](https://discuss.px4.io/user_avatar/discuss.px4.io/arthur_hanusse_becke/32/18585_2.png) [@Arthur\_Hanusse\_Becke](https://discuss.px4.io/u/Arthur_Hanusse_Becke)\
**Post date:** [February 24, 2025, 10:38am UTC](https://discuss.px4.io/t/qgroundcontrol-not-connecting-via-telemetry-radio-uart2/43926/1 "2025-02-24T10:38:01Z")

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Hello,

I am trying to connect and configure my drone to QGroundControl using a Holybro SiK Telemetry Radio V3 (433MHz). ( [SiK Telemetry Radio V3 – Holybro Store](https://holybro.com/products/sik-telemetry-radio-v3?srsltid=AfmBOoojiOjE4aKADyrOXp9U0y-UqHkSLVuiUVEyQtQUzo0GVLcYm6XA) ) One module is connected to my flight controller (UART2: TX2/RX2), and the other is connected to my PC via USB.

 ![image](https://discuss.px4.io/uploads/default/original/3X/9/1/91a7c098f2ded94d691e18bbac3dfeaaab821255.png)

When I connect the drone directly to the PC via USB, QGroundControl detects it without any issues. However, when I try to connect via the telemetry radios, QGroundControl does not detect the drone.

Here’s what I have checked so far:

The two radio modules are paired (solid green LED on both).  
The module connected to the PC appears as a serial port (Device 015)

 ![image](https://discuss.px4.io/uploads/default/original/3X/1/3/138a8459118e4d589eaa1030016b69f031eca623.png)

I have tried several different MAVLink configurations, but the connection still does not work. I also noticed that TELEM2 is typically used for UART2, so I configured it accordingly. However, QGroundControl still does not detect the drone.

 ![image](https://discuss.px4.io/uploads/default/original/3X/4/0/40a9295669f967ebdfaad7baf5634449cf8c8064.png)

Could this issue be related to MAVLink settings, or am I missing something else?

Setup Details:

Flight Controller: Holybro Kakute H7 mini  
Firmware: PX4  
QGroundControl Version: 4.4.3  
Operating System: Linux  
Any help would be greatly appreciated! Thanks.