How to get use ble_app_mtu_througput in your code

[Waqas Qammar]

HI,

I am seeking help in getting the only peripheral code from the ble_app_mtu_throughput. Actually, I want to use the only peripheral code in my and want to use the maximum capability (1200+kbps) speed using this example. or if there any other example that I can set up for my own use case. I am using Nordic SDK 15. Can I use the ble image transfer demo somehow?

Thank you

[Sigurd]

Hi,

It would be better to use a BLE example/service that actually suits your use-case and application you plan to develop. E.g. ble_app_uart. You will be able to reach the same througput with that example.

[Waqas Qammar]

you mean changing these parameters (

• Connection interval
• Maximum number of packets per connection interval
• ATT Maximum Transmission Unit (ATT MTU)
• Data Length Extension (DLE))

to optimal give me the same result in any example? also can you please tell me do I need to set the pHY for nrf52832 or is it by default is set to support max speed?

[Sigurd]

Correct. The relevant changes in sdk_config.h is NRF_SDH_BLE_GAP_DATA_LENGTH, NRF_SDH_BLE_GAP_EVENT_LENGTH and NRF_SDH_BLE_GATT_MAX_MTU_SIZE.

To change to 2 Mbps PHY, just call this on the connected event(BLE_GAP_EVT_CONNECTED):

ble_gap_phys_t const phys =
           {
            .rx_phys = BLE_GAP_PHY_AUTO,
            .tx_phys = BLE_GAP_PHY_AUTO,
           };
           
    err_code = sd_ble_gap_phy_update(p_ble_evt->evt.gap_evt.conn_handle, &phys);
    APP_ERROR_CHECK(err_code);