> For the complete documentation index, see [llms.txt](https://docs.mclimate.eu/mclimate-lorawan-devices/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.mclimate.eu/mclimate-lorawan-devices/devices/mclimate-ht-+-pir-lite/ht-+-pir-lite-device-communication-protocol/pir-motion-sensor.md).

# PIR (Motion sensor)

## PIR State

This commands allow you to set/get the PIR state - whether it's enabled or disabled at all. By default, the PIR is enabled.

{% tabs %}
{% tab title="SET" %}

<table data-header-hidden><thead><tr><th width="131"></th><th></th></tr></thead><tbody><tr><td><strong>Byte index</strong></td><td><strong>Hex value – Meaning</strong></td></tr><tr><td>0</td><td>36 – The command code.</td></tr><tr><td>1</td><td><p>00 – Disable the PIR sensor; </p><p>01 – Enable the PIR sensor. <strong>Default state.</strong></p></td></tr></tbody></table>

**Example downlink:** 0x3600 – Disable the PIR sensor.
{% endtab %}

{% tab title="GET" %}

<table data-header-hidden><thead><tr><th width="143.99999999999997"></th><th width="193"></th><th></th></tr></thead><tbody><tr><td><strong>Byte index</strong></td><td><strong>Sent request</strong></td><td><strong>Received response</strong></td></tr><tr><td>0</td><td>37 – Command code</td><td>37 – Command code</td></tr><tr><td>1</td><td> </td><td>00 - The PIR sensor is disabled.<br>01 - The PIR sensor is enabled.</td></tr></tbody></table>

**Example command:** 0x37

**Example response:** 0x3700 – The PIR sensor is disabled.
{% endtab %}
{% endtabs %}

## Occupancy timeout

{% tabs %}
{% tab title="SET" %}

<table data-header-hidden><thead><tr><th width="140"></th><th></th></tr></thead><tbody><tr><td><strong>Byte index</strong></td><td><strong>Hex value – Meaning</strong></td></tr><tr><td>0</td><td>38 – The command code.</td></tr><tr><td>1</td><td>XX –  Occupancy timeout data, bits 15:8;</td></tr><tr><td>2</td><td>XX – Occupancy timeout data, bits 7:0. <strong>Default value is 5min.</strong></td></tr></tbody></table>

**Example command:** 0x38003C – Set the occupancy timeout to 1min.
{% endtab %}

{% tab title="GET" %}

<table data-header-hidden><thead><tr><th width="143.99999999999997"></th><th width="193"></th><th></th></tr></thead><tbody><tr><td><strong>Byte index</strong></td><td><strong>Sent request</strong></td><td><strong>Received response</strong></td></tr><tr><td>0</td><td>39 – Command code</td><td>39 – Command code</td></tr><tr><td>1</td><td> </td><td>XX - Occupancy timeout - bits 15:8</td></tr><tr><td>2</td><td></td><td>XX - Occupancy timeout - bits 7:0</td></tr></tbody></table>

**Example command:** 0x39

**Example response:** 0x39003C –  The occupancy timeout is 1min.
{% endtab %}
{% endtabs %}

{% hint style="info" %}
**Note:** Acceptable values: 15...65535sec. (1sec. resolution).
{% endhint %}

## PIR Sensitivity

The PIR sensitivity can be set from 12 to 255. The minimum value we advise setting is 12 or 0x0C - the sensor will be super sensitive to movements.

{% hint style="warning" %}
The higher the value, the less sensitive the PIR sensor is to movement.&#x20;

Minimum = 12 - very sensitive

Maximum = 255 - less sensitive
{% endhint %}

{% tabs %}
{% tab title="SET" %}

<table data-header-hidden><thead><tr><th width="131"></th><th></th></tr></thead><tbody><tr><td><strong>Byte index</strong></td><td><strong>Hex value – Meaning</strong></td></tr><tr><td>0</td><td>3Е – The command code.</td></tr><tr><td>1</td><td>XX - PIR sensor sensitivity. <strong>Default value is 20.</strong></td></tr></tbody></table>

**Example command:** 0x3E1E – Set PIR sensor sensitivity to 30.
{% endtab %}

{% tab title="GET" %}

<table data-header-hidden><thead><tr><th width="143.99999999999997"></th><th width="193"></th><th></th></tr></thead><tbody><tr><td><strong>Byte index</strong></td><td><strong>Sent request</strong></td><td><strong>Received response</strong></td></tr><tr><td>0</td><td>3F – Command code</td><td>3F – Command code</td></tr><tr><td>1</td><td> </td><td>XX - The sensitivity of the PIR sensor</td></tr></tbody></table>

**Example command:** 0x3F

**Example response:** 0x3F1E – The sensitivity of the PIR sensor is 0x1E => converted to decimal => 30.
{% endtab %}
{% endtabs %}

{% hint style="info" %}
**Note:** Acceptable values: 12...255.
{% endhint %}


---

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