> For the complete documentation index, see [llms.txt](https://spaceandtech-engineerings.gitbook.io/space-and-tech-engineerings-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://spaceandtech-engineerings.gitbook.io/space-and-tech-engineerings-docs/radio/sate-elrs/wiring-and-configuration.md).

# Wiring and Configuration

To interface the SATE ELRS V3 receiver with a flight controller via UART1 using the Crossfire (CRSF) protocol, follow these steps:

Connect the SATE ELRS V3's TX pin to the UART1 RX pin on the flight controller, and the SATE ELRS V3's RX pin to the UART1 TX pin on the flight controller.

Ensure proper power delivery by connecting the SATE ELRS V3's 5V and GND pads to the corresponding 5V and GND pads on the flight controller.

This configuration enables stable communication between the receiver and the flight controller using the CRSF protocol.

## BetaFlight

<figure><img src="/files/bFxEX7NNYqeSO9Pv2UGo" alt=""><figcaption></figcaption></figure>

In the Betaflight Configurator, (for example/reference we are using UART1) configure UART1 by enabling the "Serial RX" option in the Ports tab for the receiver, as illustrated below.

<figure><img src="/files/ymbMVRyGiBM7WJXSfu8a" alt=""><figcaption></figcaption></figure>

In the Receiver tab, set the Receiver Mode to "Serial (via UART)" and select "CRSF" from the Serial Receiver Provider dropdown menu, as demonstrated below.

<figure><img src="/files/Mh35va5W8Dqcy2TH3Cyy" alt=""><figcaption></figcaption></figure>

## INAV

<figure><img src="/files/bFxEX7NNYqeSO9Pv2UGo" alt=""><figcaption></figcaption></figure>

In the INAV Configurator, (For example/reference we are using UART1) configure UART1 by enabling the "Serial RX" option for the receiver in the Ports tab, as illustrated below.

<figure><img src="/files/M05Of4DgzoKOa3XBKUgH" alt=""><figcaption></figcaption></figure>

In the Configuration tab, enable the "Telemetry Output" option by sliding the corresponding slider to allow telemetry data to be transmitted to your radio.

<figure><img src="/files/ONEIDBAeMbrWctapgLdU" alt=""><figcaption></figcaption></figure>

In the Receiver tab, set the Receiver Type to "SERIAL" and select "CRSF" from the Serial Receiver Provider dropdown menu, as shown below.

<figure><img src="/files/wYRHxRDsm9gnLD0aq7al" alt=""><figcaption></figcaption></figure>


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