# Filter and connect to a specific Bluetooth device from the List Viewer
**URL:** https://community.thunkable.com/t/filter-and-connect-to-a-specific-bluetooth-device-from-the-list-viewer/2476943
**Category:** BLE / BlueTooth
**Tags:** design, listview, bluetooth, help, listviewer
**Created:** [June 21, 2023, 3:55pm UTC](https://community.thunkable.com/t/filter-and-connect-to-a-specific-bluetooth-device-from-the-list-viewer/2476943 "2023-06-21T15:55:34Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@thunkable28](https://community.thunkable.com/u/thunkable28)
#### Post date: [June 21, 2023, 3:55pm UTC](https://community.thunkable.com/t/filter-and-connect-to-a-specific-bluetooth-device-from-the-list-viewer/2476943/1 "2023-06-21T15:55:34Z")
Hello Thunkable community,
I am working on a BLE app where the App first scans for all the discoverable devices and then user connects to a specific device from the ListViewer. The block implementation to discover the BLE devices is shown below:
On the App side, this is how the BLE devices are displayed for user selection:
So far so good. However to make user experience better, I would like to filter the devices and only display device with specific names only, preferably filtering a prefix, rather than user scrolling and looking for a specific device in the long list.
For instance, using the list above, scan all the devices, however, only display devices starting with prefix “ **MFLD\_** ” and “ **DEVID\_** ”.
Is it possible to do such filtering using blocks in Thunkable and I would appreciate if someone could provide the block snippet as to how to achieve this.
Thanks in advance. Cheers!
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### Author:  [@thunkable28](https://community.thunkable.com/u/thunkable28)
#### Post date: [June 21, 2023, 9:57pm UTC](https://community.thunkable.com/t/filter-and-connect-to-a-specific-bluetooth-device-from-the-list-viewer/2476943/2 "2023-06-21T21:57:26Z")
@ioannis, maybe you can shed some light on this one? I really need some assistance here!
Thanks
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### Author:  [@ioannis](https://community.thunkable.com/u/ioannis)
#### Post date: [June 22, 2023, 3:54pm UTC](https://community.thunkable.com/t/filter-and-connect-to-a-specific-bluetooth-device-from-the-list-viewer/2476943/3 "2023-06-22T15:54:44Z")
Hello @thunkable28
Yes, it is possible to filter the data you show on the list view
You will need to add a condition before you insert a device into the list
To create the condition you could use the [“does string contains” block](https://docs.thunkable.com/text#does-string-contain)
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### Author:  [@thunkable28](https://community.thunkable.com/u/thunkable28)
#### Post date: [June 22, 2023, 4:31pm UTC](https://community.thunkable.com/t/filter-and-connect-to-a-specific-bluetooth-device-from-the-list-viewer/2476943/4 "2023-06-22T16:31:10Z")
Thanks alot, @ioannis,
Just wanted to share with the community how I made filtering work with the List Viewer block and the [“does string contains” block](https://docs.thunkable.com/text#does-string-contain).
Now I only see the devices I want to in the List Viewer which is awesome.
Hopefully, others will find this resourceful.
Cheers
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### Author:  [@thermoman1510p3](https://community.thunkable.com/u/thermoman1510p3)
#### Post date: [September 6, 2024, 9:31pm UTC](https://community.thunkable.com/t/filter-and-connect-to-a-specific-bluetooth-device-from-the-list-viewer/2476943/6 "2024-09-06T21:31:21Z")
Hi! Great work! I’m curious what your variable is, as I’m trying to do the same thing and I want to get it right!!
Thanks!
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### Author:  [@ioannis](https://community.thunkable.com/u/ioannis)
#### Post date: [November 8, 2024, 1:33pm UTC](https://community.thunkable.com/t/filter-and-connect-to-a-specific-bluetooth-device-from-the-list-viewer/2476943/7 "2024-11-08T13:33:45Z")