> For the complete documentation index, see [llms.txt](https://enless.gitbook.io/centre-aide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://enless.gitbook.io/centre-aide/guides-installation/documentation-en/products/editor-3/use/push-button-use.md).

# Push-button use

The TX CO2 T\&H AMB, like all the sensors in the Room Control range, has a push-button with several combinations.

{% embed url="<https://youtu.be/aCkxq8RBFXo>" %}

## Combinations

<table data-card-size="large" data-view="cards"><thead><tr><th></th><th></th><th data-hidden data-card-cover data-type="image">Cover image</th></tr></thead><tbody><tr><td><strong>Short press (less than 1 s)</strong></td><td>Sending a test frame.<br>The orange LED will blink once the frame has been sent.</td><td><a href="/files/a04e11d0ff2f11fff0a94ff351003a3628160247">/files/a04e11d0ff2f11fff0a94ff351003a3628160247</a></td></tr><tr><td><strong>Press until the blue LED appears</strong></td><td>Enable Bluetooth mode for sensor configuration from the mobile app. When Bluetooth mode is enabled, the blue LED blinks. To exit Bluetooth mode, you can press the push-button again for 5 s until the blue LED stops blinking.</td><td><a href="/files/8bbf7ac7bd27db7573cec22e3f75c92e7a42201b">/files/8bbf7ac7bd27db7573cec22e3f75c92e7a42201b</a></td></tr><tr><td><strong>Press until the green LED appears</strong></td><td>Resend a JOIN Request.<br>If you release the button when the green LED appears, the sensor resends a JOIN Request (works only if the sensor is not already connected to a LoRaWAN network)</td><td><a href="/files/505d0eae834a398e9ecc08123b1cc92ee3b3e3a5">/files/505d0eae834a398e9ecc08123b1cc92ee3b3e3a5</a></td></tr><tr><td><strong>Press until the orange LED appears</strong></td><td>Start the CO2 sensor calibration.<br>The CO2 sensor calibration procedure is described <a href="/pages/5310983b2b5f8767b1658406b9211f44abb41dd3">in this section</a>.</td><td><a href="/files/66ce774802ce6f5e5a5f37ee93b446bbdb127577">/files/66ce774802ce6f5e5a5f37ee93b446bbdb127577</a></td></tr><tr><td><strong>Press until the red LED appears</strong></td><td>Empty the sensor's supercap.<br>When you release the button when the red LED appears, the transmitter will empty its supercap so that no energy remains in the sensor electronics. You can then completely restart the product.<br><br>Warning: this procedure must be carried out when the sensor battery has been removed from its slot.</td><td><a href="/files/3c9abcb1a15689d2a35be35509d77ef11297163d">/files/3c9abcb1a15689d2a35be35509d77ef11297163d</a></td></tr></tbody></table>


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