how to enable 2mbps

[cann0021]

Hello everybody.

I have two boards. I have been trying to build a communication between my boards for a time. I could not manage to have 2mbps data transfer rate. 

Boards                    : nRF52832 DK(PCA10040) and nRF52840 Dongle(PCA10059)
SDK version           : 15.3.0
SoftDevice Version : 6.1.1
SoftDevices            : s132 for PCA10040 and s140 for PCA10059
Examples               : ble_app_uart and ble_app_uart_c

1-) How can I enable 2mbps data transfer rate ? I have tried various methods like sending PHY updating requests etc. But I guess I am doing something wrong. What is the correct way to do it?
2-) Let's say I managed to have 2mbps data transfer rate. How can I test it ? How to verify that I am having 2mbps data transfer rate ?

Sincerely.

[cann0021]

Hi, thanks for the response.

I have already added that code snippet into my code. As I said before, it causes FATAL_ERROR.

static void advertising_start(void) {
  uint32_t err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
  NRF_LOG_INFO("err_code: %d",err_code);
  APP_ERROR_CHECK(err_code);
}

It returns:

<info> app: err_code: 7

When I check the meaning of 7:

#define NRF_ERROR_INVALID_PARAM               (NRF_ERROR_BASE_NUM + 7)  ///< Invalid Parameter

It should not be hard that much to have 2 mbps transfer rate. I'm stuck here and I have to find a solution in 6 days.

[Simonr]

Hi

Can you upload the full advertising_init() and advertising_start() functions in your application so I can have a look?

error code 7 does indeed mean that you have an invalid parameter somewhere, so one or more of your m_adv_params. are not set correctly. For example, what is your interval set to? This must be between 0x0020 and 0x4000 to be valid.

Best regards,

Simon

[cann0021]

Hi Mr.Simonr.

I am using default SDK 15.3.0 examples. I have not changed anything from default _init() and _start() functions.

[cann0021]

Sorry, I clicked "Verify Answer" button mistakenly. I do not want that the ticket be closed.

[cann0021]

I decided to use the most current SDK (16.0.0). I wrote a function that works to test throughput. It works in peripheral side. Please tell me if I am doing something uncorrect.

uint16_t data_point_to_transmit = 244;
uint8_t data_to_transmit[244]   = {0};

void throughput_test() {
  static int payload_per_second = 0;
  ret_code_t my_err_code = 0;
  ret_code_t err_code;
    
  if (isConnected) 
  {
    do 
    {
      err_code = ble_nus_data_send(&m_nus, data_to_transmit, &data_point_to_transmit, m_conn_handle);
      if(err_code != NRF_SUCCESS){
        printf("err_code: %d\r\n",err_code);
      }
    } while ((err_code != NRF_ERROR_INVALID_STATE) && (err_code != NRF_ERROR_BUSY) && (err_code == NRF_SUCCESS));
    if (timer_flag == false) 
    {
      payload_per_second = payload_per_second + data_point_to_transmit;
    } 
    else 
    {
      timer_flag         = false;
      printf("Throughput: %d KB - %d Bytes - %d bits per second\r\n",
          payload_per_second / 1024,
          payload_per_second,
          payload_per_second * 8);
      
      payload_per_second = 0;
    }
  } 
  else 
  {
    payload_per_second = 0;
  }
}

for (;;)
    {
        throughput_test();
        idle_state_handle();
    }

I am getting an error (19). What is wrong with this ?

Best regards.