Android Question Bluetooth discovers BLE

[diego]

I've been looking for an answer to this strange behavior but couldn't find it:

I have a hm-10 BLE module and with an example it works fine when scans and finds it in my cellphone. But with a tablet Lenovo tab8 scanning doesn't find it. Instead if I try with old bluetooth discovering it finds it! Of course it doesn't connect as the module is BLE.

How can I know if the device is BLE or bluetooth?

 

[Erel]

HM-10 is BLE.

Run the example as-is: https://www.b4x.com/android/forum/threads/b4x-ble-2-bluetooth-low-energy.59937/#content
Are you able to discover the peripheral module?

 

[diego]

thanks Erel, with the example as-is, same behaviour. Tablet doesn't find anything, it gets scanning. Cellphone also finds (before finding HM-10) a headphones from my neighbourgh... the tablet nothing.

but I installed "Serial Bluetooth Terminal" and there it find it perfectly under "Bluetooth LE" devices.
from Android Settings-Bluetooth, it shows the HM-10 and also ask me for the PIN (I changed the original 000000 to another one)

 

[JohnC]

I don't know BLE very well, so this suggestion might not be applicable...

Does the HM-10 have a "name"?

I remember seeing a setting somewhere that you can configure BT scans to only show devices with names (not just MAC). And maybe the tablet is configured this way and if the HM-10 doesn't have a BLE "name", then it wont show in scan?

Just an idea.

 

[diego]

I don't know BLE very well, so this suggestion might not be applicable...

Does the HM-10 have a "name"?

I remember seeing a setting somewhere that you can configure BT scans to only show devices with names (not just MAC). And maybe the tablet is configured this way and if the HM-10 doesn't have a BLE "name", then it wont show in scan?

Just an idea.

Yes, it has a name. In fact I use it to connect if it's the name I wanted. But even with "null" Scan doesn't find it.

 

[Erel]

Do you see anything in the logs?

Have you tried to discover a different BLE peripheral? If your other phone supports it then you can run this example: https://www.b4x.com/android/forum/threads/ble-peripheral.84051/#content

 

[diego]

mystery solved. I didn't enable LOCATION on the tablet Android settings.

BTW, is there any way to force Location? asking for permission doesn't activate it.

thanks!

 

[JohnC]

You can't force location on, but you can check if it is off, and then have the device open it's "location" settings page to allow the user to turn it on.

 

[diego]

You can't force location on, but you can check if it is off, and then have the device open it's "location" settings page to allow the user to turn it on.

how to do it? I've seen this post

Display Location Permissions Settings Page

Hello I need to show the Request location permissions | Android Developers settings page for this. Does anyone know the instent string for this. I amcurrently using this method: Sub check_permissions_location Dim rp As RuntimePermissions Dim p As Phone, locationResult As...

www.b4x.com

but without solution.

 

[JohnC]

I think the code is this example will show how to do that:

GPS tutorial

This example shows how to work with the GPS library. The GPS object is declared in the Starter service. It is easier to put the GPS in a service and not in an Activity as the services life cycle is simpler. When the program starts we check whether the location features are enabled: Sub...

www.b4x.com

(it is discussed here: https://www.b4x.com/android/forum/t...-in-phone-system-settings.113216/#post-706529)

 

[Erel]

You can make it simple for the user to enable location services: https://www.b4x.com/android/forum/threads/fusedlocationprovider-resolution-dialog.111652/#content