Any use BLE_GAP_ADV_DATA_STATUS INCOMPLETE_xxx ?

[loquat]

On SoftDevice S140(V7.2.0)

ble_gap_adv_report_type_t status has four types.

BLE_GAP_ADV_DATA_STATUS_COMPLETE
BLE_GAP_ADV_DATA_STATUS_INCOMPLETE_MORE_DATA
BLE_GAP_ADV_DATA_STATUS_INCOMPLETE_TRUNCATED
BLE_GAP_ADV_DATA_STATUS_INCOMPLETE_MISSED

BLE_GAP_ADV_DATA_STATUS_INCOMPLETE_xxx

What does those status mean?

[Kenneth]

I can find from the documentation:
https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.s132.api.v7.2.0%2Fgroup___b_l_e___g_a_p___a_d_v___d_a_t_a___s_t_a_t_u_s.html 

Kenneth

[loquat]

OK, but,

written on ble_gap_scan_params_t.report_incomplete_evts
@note This feature is not supported by this SoftDevice.

and I try to set report_incomplete_evts =1, sd_ble_gap_scan_start return NRF_ERROR_NOT_SUPPORTED.

So that, never be return BLE_GAP_ADV_DATA_STATUS_INCOMPLETE_MORE_DATA?

Also, What situation when be return
BLE_GAP_ADV_DATA_STATUS_INCOMPLETE_TRUNCATED
BLE_GAP_ADV_DATA_STATUS_INCOMPLETE_MISSED ?

[Kenneth]

I asked the softdevice team to fill in a bit more information, here is their feedback:

BLE_GAP_ADV_DATA_STATUS_INCOMPLETE_MORE_DATA will never be returned by the SoftDevice.

BLE_GAP_ADV_DATA_STATUS_INCOMPLETE_MISSED: "Failed to receive the remaining data" (from API docs). The SoftDevice tried to receive more data in a chain of advertising data, but was not able receive all packets.

BLE_GAP_ADV_DATA_STATUS_INCOMPLETE_TRUNCATED: "Incomplete data. Buffer size insufficient to receive more " (from API docs). The advertiser indicated that there was more data to come, but the provided buffer in sd_ble_gap_scan_start() was not large enough.

Hope that helps,
Kenneth

[loquat]

For example,
When Advertiser Send advertising ADV_EXT_IND + AUX_ADV_IND(AdData Length=200) + AUX_CHAIN_IND(AdData Length=200).
(And (sd_ble_gap_scan_start()'s adv_report_buffer length is 256Bytes)

If AUX_CHAIN_IND is recieved, status is BLE_GAP_ADV_DATA_STATUS_INCOMPLETE_TRUNCATED?(and recieved length = 256bytes?)

If AUX_CHAIN_IND is not recieved, status is BLE_GAP_ADV_DATA_STATUS_INCOMPLETE_MISSED?(and recieved length = 200bytes?)

And additional question.

What size can I specify for adv_report_buffer ?
(I try , 256bytes/1650bytes/3650bytes(!). It's all OK)
When 3650bytes is set, can recieve 3650bytes at once?

[Kenneth]

I believe most of what you are asking here is available in the API documentation, see the documentation of the parameter p_adv_report_buffer in

https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s140.api.v7.3.0/group___b_l_e___g_a_p___f_u_n_c_t_i_o_n_s.html#gabbd87dea8f218d2a7e12c40cfbc6a7d2 

and

https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s140.api.v7.3.0/group___b_l_e___g_a_p___s_c_a_n___b_u_f_f_e_r___s_i_z_e.html

Regarding your question on AUX_CHAN_IND 

-> First case status TRUNCATED, then length is 255bytes

-> Seconds case MISSED, then length is 200bytes

Best regards,
Kenneth

[loquat]

OK.

Well then

When Advertiser Send advertising ADV_EXT_IND + AUX_ADV_IND(AdData Length=200) + AUX_CHAIN_IND(AdData Length=200).
(And (sd_ble_gap_scan_start()'s adv_report_buffer length is 500Bytes)

Does it return COMPLETE? (and length = 400bytes?)

[Kenneth]

loquat said:

Does it return COMPLETE? (and length = 400bytes?)

Yes.

Kenneth

[loquat]

Oh, really?

Well then,

What does the following definition mean?

#define BLE_GAP_SCAN_BUFFER_EXTENDED_MAX_SUPPORTED (255)

And Which packet values are these?
ble_gap_evt_adv_report_t
 ->secondary_phy
 ->rssi
 ->aux_pointer

[Kenneth]

Sorry, you are right, it will be TRUNCATED.

• rssi: https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s140.api.v7.3.0/structble__gap__evt__adv__report__t.html?cp=4_7_4_1_3_0_34_7#a9592fc581c5ed9fd84514c32603bb478: "Received Signal Strength Indication in dBm of the last packet received."
• secondary_phy: https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s140.api.v7.3.0/structble__gap__evt__adv__report__t.html?cp=4_7_4_1_3_0_34_8#ac1ce5f18f0a230a38213c7ffbc6de62c: "Indicates the PHY on which the secondary advertising packet was received." (AUX_ADV_IND)
• https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s140.api.v7.3.0/structble__gap__evt__adv__report__t.html?cp=4_7_4_1_3_0_34_0#a29c7a3c09b9c3e5288e017484f421062: "The offset and PHY of the next advertising packet in this extended advertising event. Note This field is only set if ble_gap_adv_report_type_t::status is set to BLE_GAP_ADV_DATA_STATUS_INCOMPLETE_MORE_DATA."