Hi,
I am using the two units talking with each other for the BLE uart.
One is running with the example ble_app_uart_c_central. The other is running with the ble_app_uart_peripheral. Both example based on the SDK version nRF5_SDK_17.0.2_d674dde.
It was working fine, when I am using them in the orginal mode for the sensor data streaming.
But, when I did some changes to it, to make both of them into the long range mode with 8dbm and coded mode. The connection is fine, but when I sending more data will make the peripheral fails. When I debugging on it, I find was the data I send is too long or too much.
Here is some code and error added
In the peripheral side, when it call the intrruption function "void in_pin_handler(void)" been called for each 20 seconds, in each call it sending the bluetooth package to the centeral unit by the function "void niklas_ble_send_array_handler(void)". when the package is big, for example size is 70 as below the parameter set, then comes out memory issues.
ble_tx_buffer_acc_len=70;
ble_tx_buffer_ang_len=70;
code as below
void niklas_ble_send_array_handler(void)
{
uint32_t err_code;
#ifdef DEBUG_BLE_SEND_DEBUG
printf("G1 \r\n");nrf_delay_ms(1);
#endif
if(ble_tx_buffer_acc_len<BLE_NUS_MAX_DATA_LEN)
{
do
{
err_code = ble_nus_data_send(&m_nus, ble_tx_buffer_acc, &ble_tx_buffer_acc_len, m_conn_handle);
if ((err_code != NRF_ERROR_INVALID_STATE) &&
(err_code != NRF_ERROR_RESOURCES) &&
(err_code != NRF_ERROR_NOT_FOUND))
{
APP_ERROR_CHECK(err_code);
}
} while (err_code == NRF_ERROR_RESOURCES);
}
#ifdef DEBUG_BLE_SEND_DEBUG
printf("G2 \r\n");nrf_delay_ms(1);
#endif
if(ble_tx_buffer_acc_len<BLE_NUS_MAX_DATA_LEN)
{
do
{
err_code = ble_nus_data_send(&m_nus, ble_tx_buffer_ang, &ble_tx_buffer_ang_len, m_conn_handle);
if ((err_code != NRF_ERROR_INVALID_STATE) &&
(err_code != NRF_ERROR_RESOURCES) &&
(err_code != NRF_ERROR_NOT_FOUND))
{
APP_ERROR_CHECK(err_code);
}
} while (err_code == NRF_ERROR_RESOURCES);
}
#ifdef DEBUG_BLE_SEND_DEBUG
printf("G3 \r\n");nrf_delay_ms(1);
#endif
}
void in_pin_handler(void)
{
//nrf_drv_gpiote_out_toggle(PIN_OUT);
printf("INTC\n");nrf_delay_ms(1);
uint8_t k=0;
uint32_t err_code;
uint8_t channel;
k=read_out_FIFO_float();
bsp_board_led_invert(BSP_BOARD_LED_2);
#ifdef DEBUG_FIFO_SIZE_INSIDE
printf("P3:%d\n", k);nrf_delay_ms(1);
printf("s_connected=%d\n",status_connected);nrf_delay_ms(1);
#endif
#ifdef DEBUG_BLE_SEND_DEBUG
printf("ble_tx_buffer_acc_len=%d\n",ble_tx_buffer_acc_len);nrf_delay_ms(1);
printf("ble_tx_buffer_ang_len=%d\n",ble_tx_buffer_ang_len);nrf_delay_ms(1);
printf("BLE_NUS_MAX_DATA_LEN=%d\n",BLE_NUS_MAX_DATA_LEN);nrf_delay_ms(1);
#endif
//if((status_connected==1)&&(status==9)){niklas_ble_send_handler();}
if((status_connected==1)&&(status==9))
{
#ifdef LONG_RANGE_HIGH_SPEED_BLE_STREAMING_SLOW
ble_tx_buffer_acc_len=70;
ble_tx_buffer_ang_len=70;
#endif
niklas_ble_send_array_handler();
//reference https://www.jianshu.com/p/c81c576bbdf5
/*
err_code =sd_ble_gap_rssi_get(m_conn_handle,&rssi_value,&channel);
printf("RSSI=%d\n",rssi_value);nrf_delay_ms(1);
APP_ERROR_CHECK(err_code);
*/
}
}
