MTU size

[Baruch]

https://devzone.nordicsemi.com/f/nordic-q-a/29255/mtu-size-of-nrf52832-as-central has the answer of how to change MTU size. Could you please provide more details with the actual numbers for some given example how to increase MTU with ALL necessary actions for Keil and defines to be updated.

Thanks.

[haakonsh]

See GATTC ATT_MTU Exchange and GATTS ATT_MTU Exchange, sd_ble_cfg_set, sd_ble_gattc_exchange_mtu_request, and sd_ble_gatts_exchange_mtu_reply.

[Baruch]

Thank you for the fast response. I didn't find any example using this feature. For the ble_app_uart peripheral should I add for the ble_evt_handle the case BLE_GATTS_EVT_EXCHANGE_MTU_REQUEST? Of course, I will need to modify the central part whenever I'll be working on that part. 

Could you please provide the example for  sd_ble_cfg_set() for both peripheral and central ble_app_uart?

Are those all the changes I need to do to change the MTU size?

Thanks.

[haakonsh]

Forgot to give you the link to the Experimental: GATT Module documentation and GATT module API. It handles MTU and DLE. 

The Experimental: ATT_MTU Throughput Example uses the GATT module. 

[Baruch]

Thank you. Will research it later. There is always another fire to fight. ;-) 

[haakonsh]

Too true :P 

[Baruch]

[Baruch]

I'm going to close this ticket because I don't see having enough time to go through, but I will return ASAP and don't worry more questions will come. But could you please tell me do I really need CLI and if yes then what for? 

Thanks.