> For the complete documentation index, see [llms.txt](https://docs.dnt.de/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.dnt.de/dnt-lw-wth/kommunikationsprotokoll/9.-datenrate-und-rejoin.md).
# 9. Datenrate und Rejoin
## 9.1 Datenrate
{% hint style="info" %}
Bei Firmwareversionen < 1.2.0 muss das IR-Bit bei den folgenden Befehlen gesetzt werden:
* SET DATA RATE: 0xF9
* GET DATA RATE: 0xF8
{% endhint %}
{% tabs %}
{% tab title="SET DATA RATE" %}
Konfiguration der Datenrate.
**Beispiel**
```
0x79 04 = Datenrate 3 aktiv
```
**Downlink**
| Byte | Bit(s) | Value |
| :----------: | :----: | :-----------------: |
| 0 | 7 | Res. |
| 0 | 6:0 | `0x79` (Command ID) |
| 1 | 7:5 | Res. |
| 1 | 4:0 | `ID_DATA_RATE` |
| {% endtab %} | | |
{% tab title="GET DATA RATE" %}
Abfrage der eingestellten Datenrate.
**Downlink**
| Byte | Bit(s) | Value |
| :--: | :----: | :-----------------: |
| 0 | 7 | `IR` |
| 0 | 6:0 | `0x78` (Command ID) |
**Uplink**
| Byte | Bit(s) | Value |
| :-----------: | :----: | :-----------------: |
| 0 | 7 | Res. |
| 0 | 6:0 | `0x78` (Command ID) |
| 1 | 7:5 | Res. |
| 1 | 4:0 | `ID_DATA_RATE` |
| {% endtab %} | | |
| {% endtabs %} | | |
ID_DATA_RATE
| Eigenschaft | Wert |
| :------------: | :-------------------------------------------------------------------------------------: |
| Beschreibung | Einstellung der LoRaWAN® Datenrate |
| Größe | 4 Bit |
| Wertebereich | 0–6 |
| Standardwert | 0 |
| Interpretation | 0 → Adaptive Datenrate aktiviert
1–6 → y = x - 1
|
| Persistent | Ja |
| Zugriff | r/w |
## 10.2 Rejoin
{% hint style="info" %}
Bei Firmwareversionen < 1.2.0 muss das IR-Bit bei den folgenden Befehlen gesetzt werden:
* GET TIME UNTIL NEXT REJOIN: 0xF7
* GET REJOIN BEHAVIOUR: 0xFA
* SET REJOIN BEHAVIOUR: 0xFB
{% endhint %}
{% tabs %}
{% tab title="GET TIME UNTIL NEXT REJOIN" %}
Abfrage, wann der nächste Rejoin stattfindet.
Ist der Wert `0`, steht kein Rejoin aus.
**Downlink**
| Byte | Bit(s) | Value |
| :--: | :----: | :-----------------: |
| 0 | 7 | `IR` |
| 0 | 6:0 | `0x77` (Command ID) |
**Uplink**
| Byte | Bit(s) | Value |
|---|
| 0 | 7 | Res. |
| 0 | 6:0 | 0x77 (Command ID) |
| 1 | 7:5 | Res. |
| 1 | 4:0 | ID_REMAINING_TIME_UNTIL_REJOIN [20:16] |
| 2 | 7:0 | ID_REMAINING_TIME_UNTIL_REJOIN [15:8] |
| 3 | 7:0 | ID_REMAINING_TIME_UNTIL_REJOIN [7:0] |
{% endtab %}
{% tab title="GET REJOIN BEHAVIOR" %}
Abfrage der Rejoin-Konfiguration.
**Downlink**
| Byte | Bit(s) | Value |
| :--: | :----: | :-----------------: |
| 0 | 7 | `IR` |
| 0 | 6:0 | `0x7A` (Command ID) |
**Uplink**
| Byte | Bit(s) | Value |
| :----------: | :----: | :-------------------------: |
| 0 | 7 | Res. |
| 0 | 6:0 | `0x7A` (Command ID) |
| 1 | 7 | `ID_SINGLE_REJOIN_EN` |
| 1 | 6:0 | `ID_REJOIN_INTERVAL [15:8]` |
| 2 | 7:0 | `ID_REJOIN_INTERVAL [7:0]` |
| {% endtab %} | | |
{% tab title="SET REJOIN BEHAVIOR" %}
Konfiguration des Rejoin-Verhaltens.
**Beispiel**
```
0x7B 80 0C = einzelner Rejoin in 12 h
```
**Downlink**
| Byte | Bit(s) | Value |
| :-----------: | :----: | :-------------------------: |
| 0 | 7 | Res. |
| 0 | 6:0 | `0x7B` (Command ID) |
| 1 | 7 | `ID_SINGLE_REJOIN_EN` |
| 1 | 6:0 | `ID_REJOIN_INTERVAL [15:8]` |
| 2 | 7:0 | `ID_REJOIN_INTERVAL [7:0]` |
| {% endtab %} | | |
| {% endtabs %} | | |
ID_REMAINING_TIME_UNTIL_REJOIN
| Eigenschaft | Wert |
| :------------: | :-----------------------------: |
| Beschreibung | Minuten bis zum nächsten Rejoin |
| Größe | 21 Bit |
| Wertebereich | 0–1966080 |
| Interpretation | `y = x`, `[y] = min` |
| Persistent | Nein |
| Zugriff | r |
ID_SINGLE_REJOIN_EN
| Eigenschaft | Wert |
| :------------: | :-------------------------------------------------------------------------------: |
| Beschreibung | Auswahl zwischen zyklischem und einzelnem Rejoin |
| Größe | 1 Bit |
| Wertebereich | 0–1 |
| Standardwert | 0 |
| Interpretation | 0 → zyklischer Rejoin
1 → einzelner Rejoin
|
| Persistent | Nein |
| Zugriff | r/w |
ID_REJOIN_INTERVAL
| Eigenschaft | Wert |
| :------------: | :-----------------------------: |
| Beschreibung | Intervall des Rejoin-Verhaltens |
| Größe | 15 Bit |
| Wertebereich | 0–32768 |
| Standardwert | 0 |
| Interpretation | `y = x`, `[y] = h` |
| Persistent | Ja, bei zyklischem Rejoin |
| Zugriff | r/w |
---
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