About changing connection parameters

[Sawada]

Central info
   SDK: 15.3
   nRF52840

Peripheral info
   SDK: 13.1
   nRF52832

I want to increase the communication speed after connection.
I want to know how to set the communication speed setting value in Central.

Currently, the setting value of the communication speed is changed by calling the sd_ble_gap_conn_param_update () function from the peripheral.
What functions must be called and the Define value to be changed in order to change the communication speed setting value with Central?

[Simonr]

Hi

I'm sorry, but I'm having some trouble understanding what you mean. Do you want to increase the throughput (Mbps/kbps) between the two devices? In that case, please take a look at this guide that shows you how to achieve the maximum throughput between two devices using Bluetooth 5. If this was not what you were after, please try to explain in detail what it is you mean by communication speed.

Best regards,

Simon

[Sawada]

Connection params are requested from Peripheral as follows.
{
.....
     gap_conn_params.min_conn_interval = MIN_CONN_INTERVAL;
     gap_conn_params.max_conn_interval = MAX_CONN_INTERVAL;
     gap_conn_params.slave_latency = SLAVE_LATENCY;
     gap_conn_params.conn_sup_timeout = CONN_SUP_TIMEOUT;

     err_code = sd_ble_gap_conn_param_update (p_ble_evt-> evt.gap_evt.conn_handle, & gap_conn_params);
.....
}

However, I want to change this Connection params on the Central side.
I want to know if it can be done.
For example, can the Connection Interval be changed simply by changing the value of the following Central sdk_config.h?

#define NRF_BLE_SCAN_MIN_CONNECTION_INTERVAL 7.5
#define NRF_BLE_SCAN_MAX_CONNECTION_INTERVAL 30

[Simonr]

If you want the connection interval to be as low as possible, you should set both the MIN_CONNECTION_INTERVAL and MAX_CONNECTION_INTERVAL to 7.5ms. For the central application, this is likely set in the sdk_config.h file.

Best regards,

Simon