Send mult notifications in one connection interval

RE: Send mult notifications in one connection interval

bjorn-spockeli — Tue, 26 Mar 2019 09:40:21 GMT

1730143: Yes, you can set the GAP event length can be set higher than the connection interval, this means that the connection event may last upto the start of the next connection event.

RE: Send mult notifications in one connection interval

1730143 — Thu, 14 Mar 2019 08:52:40 GMT

BLE_GAP_EVENT_LENGTH can be larger than connection interval ?

RE: Send mult notifications in one connection interval

bjorn-spockeli — Wed, 25 Jul 2018 16:16:01 GMT

Q1: Yes, BLE_GATTS_EVT_HVN_TX_COMPLETE is generated after each successful notification.

Q2: No, we do not have a ble_app_uart example that uses the 2M Phy, DLE and a 247 ATT MTU.

Q3: Yes, the same throughput should be achievable.

RE: Send mult notifications in one connection interval

ezra — Thu, 05 Jul 2018 14:46:53 GMT

Hi,

Thank you for the reply.

Yes I saw the ATT_MTU Throughput Example, this example is not best on NUS.

Also is succeed to changes the GATT module to faster commination, according to ‘ ATT_MTU Throughput’ Example and the post at: https://www.novelbits.io/bluetooth-5-speed-maximum-throughput/ [I changed the ‘BLE_GAP_EVENT_LENGTH’ to 400 units (500 msec)].

Do to event ‘BLE_GATTS_EVT_HVN_TX_COMPLETE’ arrived after each notification send (than the counter will be always 1) or after connection interval finish (than the counter will report the notifications number send during one connection interval)?
Does Nordic have example base on NUS that show throughput like in the above post (‘Bluetooth 5 speed: How to achieve maximum throughput for your BLE application’)?
Can I achieved the same throughput with NUS like in the post (case 4: PHY: 2 Mbps, ATT MTU = 247 bytes, DLE: enabled, Connection interval: 7.5 msec) around 900K bps? Until now I achieved only 370K bps.

Ezra

RE: Send mult notifications in one connection interval

Kenneth — Thu, 05 Jul 2018 11:28:51 GMT

Hi,

You should be able to send more than 1 notification, have you checked out:
http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.0.0/ble_sdk_app_att_mtu.html?cp=4_0_0_4_1_1_0
(and http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.0.0/lib_ble_gatt.html)

Best regards,
Kenneth