on ble_app_uart how can change MTU size and LL payload size?

[johnny]

Hi

on nrf52832 ble_app_uart how can change MTU size and LL payload size? have any source ? or example ?

or any change MTU and payload example ?

( for BT4.2 ~ BT4.0 )

thanks.

[Petter Myhre]

Which SDK and SoftDevice version are you using? I recommend looking at the ble_app_att_mtu_throughput example for increasing the ATT MTU and LL payload size.

[johnny]

I want use sdk 12.3 or SDK14.1 , i now i can change ATT_MTU but just change this ? and I do not understand how to achieve change LL payload size. thanks,

[Petter Myhre]

This is usually handled by the GATT module.

You set the ATT MTU with nrf_ble_gatt_att_mtu_periph_set()?

Have you tried setting the data length with nrf_ble_gatt_data_length_set()?

[johnny]

on sdk14.0 ble_app_uart , the can write ATT MTU to max = 247byte