> For the complete documentation index, see [llms.txt](https://www.multi-module.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://www.multi-module.org/using-the-module/protocol-details/corona.md).

# Corona

## Details

**Protocol Number:**  37\
**Autobind:**  No\
**Channel Re-mapping:**  No\
**Extended Limits:**  Yes\
**Failsafe Support:**  No\
**Receiver Match:**  No\
**Telemetry:**  No\
**Option Value:**  Frequency fine tuning

{% hint style="danger" %}
Frequency tuning is required for this protocol.  See the [Frequency Tuning](/using-the-module/frequency-tuning.md) page for more details.
{% endhint %}

## Notes

**Models:** Corona 2.4GHz FSS and DSSS receivers.

## Channel Assignment

| CH1 | CH2 | CH3 | CH4 | CH5 | CH6 | CH7 | CH8 |
| --- | --- | --- | --- | --- | --- | --- | --- |
| CH1 | CH2 | CH3 | CH4 | CH5 | CH6 | CH7 | CH8 |

## Sub Protocols

### 0 - COR\_V1

**Models:** Corona FSS V1 receivers

### 1 - COR\_V2

**Models:** Corona DSSS V2 receivers - CR8D, CR6D and CR4D

To bind V2 receivers, you must follow this procedure:

* Press the bind button and power on the receiver
* Launch a bind from the radio - the receiver's LED will blink 2 times
* Turn off the receiver **and** the radio
* Turn on the receiver **first**
* Turn on the radio **second**
* Wait for the bind to complete - the receiver's LED will flash, stop and finally fix
* Wait some time (at least 30 sec) before turning off the receiver
* Turn off/on the receiver and test that it can reconnect instantly.  If not, repeat the bind procedure.

### 3 - FD\_V3

**Models:** FlyDream receivers - IS-4R and IS-4R0, etc, Avionic receivers - RX8, etc.