SDKv15.2: Custom profile send and receive more than 100 bytes

[Rajneesh]

Hello Nordic team

I am working on nRF52832 DK, SDKv15.2.

My question is how we can send and receive more than 100 bytes of data? I know nus services doing it. Also how we can change MTU size?

Is there any example code available where custom BLE services sending and receiving more than 100 bytes of data?

Any help will be appreciated. 

Regards

Raj

[run_ar]

Hi,

Have you looked at: nRF5_SDK_15.2.0_9412b96\examples\ble_central_and_peripheral\experimental\ble_app_att_mtu_throughput

Example documentation here.

[Rajneesh]

Hi Thanks for quick reply.

Yes, I see the ble_app_att_mtu_throughput example. But it seems like working on peripheral and central example. Is there any other example code available or any service support the data length extension or any documentation?

[run_ar]

Some information is collected here. You need to configure:

    NRF_SDH_BLE_GAP_DATA_LENGTH 251
    NRF_SDH_BLE_GAP_EVENT_LENGTH 400 //not necessary, depends on application requirements
    NRF_SDH_BLE_GATT_MAX_MTU_SIZE 247

This will change the ram start and size settings for the application. So those will also have to be updated