> For the complete documentation index, see [llms.txt](https://drotek.gitbook.io/additional-devices/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://drotek.gitbook.io/additional-devices/telemetry/radio-telemetry-kit-433-915-mhz/plug-to-your-devices.md).

# Plug to your devices

Please connect one of the 2 telemetries to the "**Telem 1**" serial port of the Pixhawk.

![](https://2868710084-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LXNkiDAfBq1Vqjka00H%2F-LXNy7JaX1740vNaAM_L%2F-LXNyAc4yk0-351zLDHD%2FDSC02048.jpg?alt=media\&token=006ac696-2298-44ad-9a06-6bbccc947abf)

Then you can connect the other telemetry to your PC via a **micro USB** cable or to a tablet via an **OTG USB** cable.

![](https://2868710084-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LXNkiDAfBq1Vqjka00H%2F-LXNy7JaX1740vNaAM_L%2F-LXNyIr44iDqR0n3Cizf%2FPlanner-APM-Android-700x382.jpg?alt=media\&token=2a794ec3-7c95-4f70-8012-46d9fa4c858a)

![](https://2868710084-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LXNkiDAfBq1Vqjka00H%2F-LXNy7JaX1740vNaAM_L%2F-LXNyKQsb0h8E3uHq80t%2Fgroundstation-with-MP-700x383.png?alt=media\&token=d2a5b437-304b-45fb-9029-eef6f23d1a16)

{% hint style="warning" %}
**IMPORTANT**: Do not forget to screw the antennas on each telemetry module before feeding them, otherwise the HM-TRP chips can be broken.
{% endhint %}

There are **3 LEDs** on the telemetry module. The blue led indicates if the module is powered. The green led indicates if the telemetry module is correctly linked with another telemetry module. The red led indicates if the module is transmitting data.

In nominal operation, the blue led is on, the green led is on, and the red led is blinking.

![](https://2868710084-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LXNkiDAfBq1Vqjka00H%2F-LeC_PRchomnSxX0bQJ0%2F-LeC_emjZxCP8gTtF1Ka%2FLED-telemetry-drotek.png?alt=media\&token=e418d5e4-824d-4847-a008-37449f294bab)