# Detect the presence of a person using BLE connection between Phone and BX3105 dev kit

**URL:** <https://forum.sierrawireless.com/t/detect-the-presence-of-a-person-using-ble-connection-between-phone-and-bx3105-dev-kit/23332>\
**Category:** Uncategorized\
**Created:** [April 7, 2021, 11:14am UTC](https://forum.sierrawireless.com/t/detect-the-presence-of-a-person-using-ble-connection-between-phone-and-bx3105-dev-kit/23332 "2021-04-07T11:14:18Z")\
**Posts on this page:** 1\
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**Author:** ![jerdung](https://avatars.discourse-cdn.com/v4/letter/j/82dd89/32.png) [@jerdung](https://forum.sierrawireless.com/u/jerdung)\
**Post date:** [April 9, 2021, 8:04am UTC](https://forum.sierrawireless.com/t/detect-the-presence-of-a-person-using-ble-connection-between-phone-and-bx3105-dev-kit/23332/4 "2021-04-09T08:04:59Z")

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Hi @achref.daabek

The device connect to phone by BLE has mentioned in topic [BX3105 help getting started - #15 by mlw](https://forum.sierrawireless.com/t/bx3105-help-getting-started/20468/15). You need to use the application on phone to connect to BX3105 device. With this application, it only connect to device from phone application.  
So, I think BX3105 device cannot initiate the connection from it to the phone by BLE.

Thanks.

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