Dynamically add, insert and remove BLE services at run time using s140

RE: Dynamically add, insert and remove BLE services at run time using s140

ovrebekk — Mon, 31 Jul 2023 09:25:15 GMT

There is no simple example for this, no, but essentially you can just look at how the services are configured in the standard examples. Whether you add a service before you start a connection or after the basic principle is the same.

Best regards
Torbjørn

RE: Dynamically add, insert and remove BLE services at run time using s140

Ayu7 — Wed, 19 Jul 2023 11:08:45 GMT

Hi ovrebekk, do you have any example to add services or some reference?

RE: Dynamically add, insert and remove BLE services at run time using s140

ovrebekk — Mon, 01 Apr 2019 11:07:40 GMT

You welcome 🙂

RE: Dynamically add, insert and remove BLE services at run time using s140

guohui — Mon, 01 Apr 2019 09:06:03 GMT

Gotcha! Thank you so much!

RE: Dynamically add, insert and remove BLE services at run time using s140

ovrebekk — Fri, 15 Mar 2019 15:26:41 GMT

The thread developers confirmed my suspicion.

If you disable the SoftDevice without first disabling the thread stack then the stack will crash.

You should be able to disable the thread stack first, then disable the SoftDevice, change the services, and then re-enable everything, but this will be a quite slow process.

If you can accept to drop out of the thread-network for several minutes it might be an acceptable solution.

Best regards
Torbjørn

RE: Dynamically add, insert and remove BLE services at run time using s140

guohui — Thu, 14 Mar 2019 08:44:00 GMT

Thank you so much for your patient support!

Best regards,

guohui

RE: Dynamically add, insert and remove BLE services at run time using s140

ovrebekk — Wed, 13 Mar 2019 13:09:24 GMT

I am pretty sure you would have to disable openthread before disabling the SoftDevice, as the openthread stack depends on the timeslot API of the SoftDevice to schedule the thread activities alongside BLE.

I have asked the thread developers for a confirmation on this, and will get back to you when I hear from them.

Best regards
Torbjørn

RE: Dynamically add, insert and remove BLE services at run time using s140

guohui — Wed, 13 Mar 2019 02:24:33 GMT

Thank you for the clear answer!

If I was going to disable and re-enable the SoftDevice, is there any defective effect to the openthread functionality?

RE: Dynamically add, insert and remove BLE services at run time using s140

ovrebekk — Mon, 11 Mar 2019 14:05:18 GMT

If you use the 'service changed' characteristic in the GATT service you can add services dynamically, and alert the connected BLE device that the services have changed, but removing services dynamically is not supported.

The only way to remove a service dynamically is to disable the SoftDevice completely, re-enable it, and configure it without the service you want to remove.

This will obviously require any running Bluetooth connections to be taken down, and re-established once you have rebooted and reconfigured the SoftDevice.

Best regards
Torbjørn