Through put increase

[skulkarni]

Hi,

I am trying to increase the through put of the BLE peripheral device.

SDK Version-15.3, NRF52832 chip set

I looked into the example code ble_app_att_mtu_throughput_pca10040_s132 and configured the below settings

#define NRF_SDH_BLE_GAP_EVENT_LENGTH 400 

#define NRF_SDH_BLE_GATT_MAX_MTU_SIZE 251

I also made below changes after this i could see the changes are reflecting 

#define NRF_SDH_BLE_GAP_DATA_LENGTH 251 // Which is not there in example code.

Please help me to understand how to configure NRF_SDH_BLE_GAP_EVENT_LENGTH  and also whether my approach is correct. 

[haakonsh]

I believe the NRF_SDH_BLE_GAP_EVENT_LENGTH is a measure of time in units of 1.25ms (BT SIG unit), and that it should be equal to the connection interval in order to maximize throughput. 

The SoftDevice will limit the event length according to the time that's available, so a setting of 400 should not break anything. 

I can recommend the following guide on BLE throughput: https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/the-ultimate-guide-to-maximizing-your-ble-and-blue 

[skulkarni]

Thank you Haakonsh, I will go through the link.