> 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-co2-sensor-and-notifier-lorawan/co2-sensor-lorawan-device-communication-protocol/co2-boundary-levels.md).

# CO2 boundary levels

### S**et CO2** boundary levels

The command is described in Table 15.

| **Byte inde** | **Hex Velue** | **Meaning**                                                           |
| ------------- | ------------- | --------------------------------------------------------------------- |
| 0             | 1E            | The command code.                                                     |
| 1             | 03            |                                                                       |
| 2             | 84            | 0x0384 = 900. This is the good-medium CO2 zone boundary value in ppm. |
| 3             | 05            |                                                                       |
| 4             | DC            | 0x05DC = 1500. This is the medium-bad CO2 zone boundary value in ppm. |

*Table 15*

{% hint style="info" %}
Payload values in the example are default for the device.
{% endhint %}

**Example command:** 0x1E038405DC – The server sets CO2 boundary levels to 900 ppm for good-medium zone and 1500 ppm for medium-bad zone.

### **Get CO2** boundary levels

| **Byte index** | **Bit index** | **Sent request**   | **Received response**                                       |
| -------------- | ------------- | ------------------ | ----------------------------------------------------------- |
| 0              | -             | 1F – Command code. | 1F – The command code.                                      |
| 1              | 15:8          |                    | 0x03                                                        |
| 2              | 7:0           |                    | 0x84 – bits \[15:0] = 0x0384 = 900 ppm for good-medium zone |
| 3              | 15:8          |                    | 0x05                                                        |
| 4              | 7:0           |                    | 0xDC – bits \[15:0] = 0x05DC = 1500 ppm for medium-bad zone |

*Table 16*

**Example command sent from server:** 0x1F;

**Example command response:** 0x1F038405DC =>  CO2 boundary levels to 900 ppm for good-medium zone and 1500 ppm for medium-bad zone.


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## 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, and the optional `goal` query parameter:

```
GET https://docs.mclimate.eu/mclimate-lorawan-devices/devices/mclimate-co2-sensor-and-notifier-lorawan/co2-sensor-lorawan-device-communication-protocol/co2-boundary-levels.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

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.