# Downlinks

## Restart Device <a href="#id-1eda7896-759c-476b-9e8e-698ec6b7d7b9" id="id-1eda7896-759c-476b-9e8e-698ec6b7d7b9"></a>

The device supports downlink commands to restart the device, the application port is 50 by default.

| Channel | Type         | Description                                                     |
| ------- | ------------ | --------------------------------------------------------------- |
| ff      | 6f (Reboot)  | <p>1 Byte, Uint8<br>01 => Reboot the device<br></p>             |
| ff      | 95 (Restart) | <p>1 Byte, Uint8</p><p>01 => Restart the LoRaWAN Interface.</p> |

Example

To restart the LoRaWAN interface you send the following HEX payload over fPort 50.

```
ff0b01
// ff -> channel -> ff
// 95 -> type -> Restart LoRaWAN Interface
// 01 -> action -> Restart
```

## Device Parameter Reading

The device supports downlink commands to read its readable parameters, the application port is **100** by default.

<table><thead><tr><th width="120.33333333333331">Channel</th><th>Type</th><th>Description</th></tr></thead><tbody><tr><td>FF</td><td>CC (Read Parameter)</td><td>Maximum of 10 parameter types<br>(only readable parameters)</td></tr></tbody></table>

Example

To read the model, serial number and battery percentage you send the following HEX payload over fPort 100.

```
xxxxxxxx
// xx
// xx
// xx
```

## Periodic Transmissions

{% hint style="info" %}
Configuration of the periodic transmissions is added in the respective user manual of the underlying device.
{% endhint %}