How to change value of descriptor?

RE: How to change value of descriptor?

jokii — Tue, 19 Jan 2016 12:34:17 GMT

Regarding name "New descriptor", it was generated by BDS. Originally defined name was just "descriptor". Maybe this also have to be fixed in BDS plugin.

RE: How to change value of descriptor?

Anders Strand — Mon, 18 Jan 2016 15:30:41 GMT

Inside ble_service_control_register_data_new_descriptor_set we find

return sd_ble_gatts_value_set(p_service->conn_handle, p_service->control_register_data_new_descriptor_handles.value_handle, &gatts_value);

The attribute handle we use here (second parameter) is never set. It is given to us here In ble_service_init :

err_code = descriptor_add(BLE_GATT_HANDLE_INVALID, &control_register_data_new_descriptor, &descr_handle);

But descr handle is not saved to p_service->control_register_data_new_descriptor_handles.value_handle, &gatts_value.

I am not sure if this is a bug in BDS or the Nordic Plugin. Try replacing this in ble_service_init

err_code = descriptor_add(BLE_GATT_HANDLE_INVALID, &control_register_data_new_descriptor, &descr_handle);

with this:

err_code = descriptor_add(BLE_GATT_HANDLE_INVALID, &control_register_data_new_descriptor, &(p_service->control_register_data_new_descriptor_handles.value_handle));

Now we pass the attribute handle of the service struct, and the function descriptor_add will save the handle for us.

PS: Try to avoid naming your descriptors "New descriptor". It is very confusing to read the generated code :)

RE: How to change value of descriptor?

jokii — Mon, 18 Jan 2016 14:09:00 GMT

Sorry for misleading - ble_mug_control_register_data_set and ble_control_register_data_descriptor_set was edited by hand before I've attached example project (original source). In attached example project where I extracted problem ble_control_register_data_descriptor_set corresponds to ble_service_control_register_data_new_descriptor_setas you can see in code snippet (ble_service.c:114-118). ble_mug_control_register_data_set in example isn't present (it's work, so not included).

RE: How to change value of descriptor?

Anders Strand — Mon, 18 Jan 2016 14:00:09 GMT

I cannnot find ble_mug_control_register_data_set nor ble_control_register_data_descriptor_set in the files you provided. In which file and what line under can i find them?

RE: How to change value of descriptor?

jokii — Wed, 13 Jan 2016 16:03:14 GMT

Finally found attach file button :) File: "experimental_bluetoothds_template_COPY.zip"

RE: How to change value of descriptor?

Anders Strand — Wed, 13 Jan 2016 13:48:51 GMT

I cannot access the attached file on filedropper for some reason. Can you attach a zip of the project to your question post?