# Bluetooth Settings {% hint style="danger" %} It is not possible to connect to the Hydrom via Bluetooth. \ To receive the Bluetooth signals (iBeacon), please use the competitor's Tilt2app:\ If you have an iPhone, there is a BETA test currently running: {% endhint %} {% hint style="success" %} **Precondition:** To make this setting you must have access to the user interface. If this is not the case, see here how to do it:[access-to-the-user-interface](https://instruction.hydrom.io/readme/access-to-the-user-interface "mention") {% endhint %} ## Step 1: Open the Menue To access the menu bar you have to click on the three lines in the upper left corner. (See arrow)\ Then the menu bar will open.
## Select "Service" The "Services" page is a resource that allows users to select and configure various interfaces and cloud services for use with their system. On this page, users can choose from three different interfaces - HTTP, MQTT, and TCP - and several cloud services, and then activate and parameterize these options to suit their needs. This page is a useful tool for those who want to connect their system to the cloud or other external services and customize the way in which data is transmitted and received. With the options available on the "Services" page, users can tailor their system to meet their specific requirements and ensure that it is able to communicate effectively with other devices and systems. ## Step 3: Enable Bluetooth The Hydrom will now send the following measured values via bluetooth after a restart by DeepSleep. For this, DeepSleep must also be activated as shown in the picture below. {% hint style="warning" %} The "test message" option is not available for Bluetooth. So you have to wait until the Hydrom wakes up from a deep sleep. Hier findest du die Anleitu {% endhint %} ![Enabled Bluetooth](https://3744546148-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MgXIkSDi1JF7mP1grhN%2Fuploads%2F5P5bGpFzXrgtl9RLl6Vp%2FFolie26.png?alt=media\&token=32422e69-b2a0-4f36-bfeb-d5c752c6f68b) {% hint style="warning" %} The "test message" option is not available for Bluetooth. So you have to wait until the Hydrom wakes up from a deep sleep. {% endhint %} ## Choose UUID Up to 8 Hydrom can be connected in parallel via Bluetooth. The different devices are then assigned different colors. ## Choose the transmission power In the Hydrom, the power with which Bluetooth is transmitted can be set here. The range increases with higher transmission power. But beware, the battery life will also decrease with higher transmission power. The powers with ascending transmission power: * ESP\_PWR\_LVL\_N14 Corresponding to -14dbm * ESP\_PWR\_LVL\_N11 Corresponding to -11dbm * ESP\_PWR\_LVL\_N8 Corresponding to -8dbm * ESP\_PWR\_LVL\_N5 Corresponding to -5dbm * ESP\_PWR\_LVL\_N2 Corresponding to -2dbm * ESP\_PWR\_LVL\_P1 Corresponding to 1dbm * ESP\_PWR\_LVL\_P4 Corresponding to 4dbm * ESP\_PWR\_LVL\_P7 Corresponding to 7dbm ### Save Settings Saving the data is important because it is the only way to connect to the service after waking up from DeepSleep. ![Pressing the "save" button saves the settings.](https://3744546148-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MgXIkSDi1JF7mP1grhN%2Fuploads%2Fgit-blob-704c41cf23d34a68d50c0268d12bb70d003972c9%2FFolie5.png?alt=media) You can check whether the saving was successful by looking at the settings file at . to check if the save was successful. This file is the permanent memory of the Hydrom. A second way to check the saving is to reload the page (all browsers offer this). If the properties are then reloaded, the hydrom has accepted them, otherwise the old settings are reloaded. ### activate DeepSleep Activating DeepSleep is mandatory for the hydrom to be able to send data. If DeepSleep is activated, the hydrom wakes up after the set time and sends the data to the set service. Afterwards, the hydrom goes back to sleep and waits for the new service. {% content-ref url="other-settings/enable-deepsleep" %} [enable-deepsleep](https://instruction.hydrom.io/other-settings/enable-deepsleep) {% endcontent-ref %}