# RSSI - RC Radio Advanced configuration

## Attribution

This content generously contributed by @NotBlackMagic

## **RCReceiver RSSI**

The stock firmware of the included RC receiver, the FS-iA6B, does not provide any RSSI signal feedback even though the hardware is capable of it. It is possible to enable this feature by flashing a new firmware, developed by the community: <https://github.com/povlhp/FlySkyRxFirmware>

This GitHub has all the instructions necessary on how to access the programing interface of the RC receiver and how to flash the new firmware. <br>

{% hint style="warning" %}
Important to note here is that the stock firmware is read protected and can't be backed up before flashing this new firmware.\
You may wish to locate the original or at least the FlySky published firmware first before making this change!\
See - <https://www.flysky-cn.com/fsi6s>
{% endhint %}

With the new firmware flashed, we now have the receiver RSSI signal output on SBUS Channel 14, which then can be read by the FMUK66 by setting the RC\_RSSI\_PWM\_CHANNEL parameter in the PX4 firmware (can be done through QGroundControl) as shown in the figure bellow:

Enabled RC RSSI reading on SBUS Channel 14

<figure><img src="https://hackster.imgix.net/uploads/attachments/1574633/px4_rssi_fs-ia6b_Jd8RpAwNnw.png?auto=compress%2Cformat&#x26;w=740&#x26;h=555&#x26;fit=max" alt=""><figcaption></figcaption></figure>

The RSSI value is then also displayed in QGroundControl like can be seen in the figure bellow:

<figure><img src="https://hackster.imgix.net/uploads/attachments/1574632/px4_rssi_fs-ia6b_qcontrol_QEsAa9rFtz.png?auto=compress%2Cformat&#x26;w=740&#x26;h=555&#x26;fit=max" alt=""><figcaption><p>RC RSSI signal displayed in QGroundControl</p></figcaption></figure>


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://nxp.gitbook.io/hovergames/userguide/radio-controller-setup/rssi-rc-radio-advanced-configuration.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.