Change advertising data

[oneguy]

Simple question:

• I successfully use ble_advertising_init () with adv_data, scan_data and adv_opts.
• I include manufacturer data via scan_data.p_manuf_specific_data = &manuf_data. This also works well

Now I want to change my advertising packet by dynamically altering one byte only in my manuf_data byte array.

Question: do I need to call ble_advertising_init () again, or is there a more efficient way?

Thank you M

[jing]

You can call sd_ble_gap_adv_data_set() to replace or clear your advertising packet and/or scan response packet even while advertising. But unlike ble_advertising_init(), this API expects raw data from you.

jing

[oneguy]

Thank you jing

[oneguy]

Ok we found the answer:

We have done what was suggested in devzone.nordicsemi.com/.../ (i.e. added code for the BLE_GATTS_EVT_SYS_ATTR_MISSING event)

2 questions remain:

• what exactly does sd_ble_gatts_sys_attr_set do, seeing that all parameters are 0?
• why does my code work with Android/iOS apps, but not under windows?

Thank you for your help so far.

[run_ar]

Not sure how this is related to your original question. But calling sd_ble_gatts_sys_attr_set with 'null' as parameter initializes the attribute. The command is also used to restore the system attributes (e.g. cccd states) when reconnecting to a known/bonded device.