Hello,
I really need your help with my problem.
I have a sparkfun nrf52840 mini which is the peripheral, using the code ble_app_uart, and a smartphone with a custom Android app, which is the central.
I tried to send a string from peripheral to nrf Connect app with ble_nus_data_string(), but I have received no string in the application.
I have also enabled TX Characteristic from application, but the only message is: "Notifications enabled sent".
The code that transmits is:
static uint16_t m_conn_handle=BLE_CONN_HANDLE_ALL;
in ble_evt_handler() function:
case BLE_GAP_EVT_CONNECTED:
NRF_LOG_INFO("Connected");
err_code=bsp_indication_set(BSP_INDICATE_CONNECTED);
APP_ERROR_CHECK(err_code);
m_conn_handle=p_ble_evt->evt.gap_evt.conn_handle;
err_code=nrf_ble_qwr_conn_handle_assign(&m_qwr,m_conn_handle);
APP_ERROR_CHECK(err_code);
if(m_conn_handle!=BLE_CONN_HANDLE_INVALID)
{
uint8_t data_array[2]={'A','\n'};
uint16_t length=4;
err_code = ble_nus_data_send(&m_nus, data_array, &length, m_conn_handle);
for(int i=0;i<3;i++)
{
bsp_board_led_on(ADVERTISING_LED);
nrf_delay_ms(2000);
bsp_board_led_off(ADVERTISING_LED);
nrf_delay_ms(2000);
}
}I receive NRF_ERROR_INVALID_STATE in the err_code
Is anything not correct?
How can I see the string in the app?
Thank you!
