RE: BLE connection parameter update fails on certains devices

aurelieb — Thu, 18 Jun 2020 10:08:26 GMT

Hello!

Thank you for the answer, it solved the problem!

Have a nice day

RE: BLE connection parameter update fails on certains devices

Hung Bui — Fri, 12 Jun 2020 12:01:03 GMT

Hi Aure,
I assume you received event 0x21 meaning BLE_GAP_EVT_PHY_UPDATE_REQUEST not the BLE_CONN_CFG_GATTC. BLE_CONN_CFG_GATTC is not an event. BLE_GAP_EVT_PHY_UPDATE_REQUEST is the event you receive when the phone wants to change the PHY to 2Mbps.

In your main.c you should have this event handled, usually as follow:

        case BLE_GAP_EVT_PHY_UPDATE_REQUEST:
        {
            NRF_LOG_DEBUG("PHY update request.");
            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);
        } break;

Have you tried to test using our examples in the SDK ? for example ble_app_hrs to check if you can establish connection with the iOS and Android phones?