Iphone can't connect ,if config #define NRF_SDH_BLE_GATT_MAX_MTU_SIZE 50.

[gk117542]

I must set the MTU size to 23,if not ,iphone will disconnect the board after connected in 30seconds.

can some one help me ,and tell me why .

[Simonr]

If it is not defined at all you need to add it, as it is necessary that the data length is also set correctly as well to edit your MTU.

Best regards,

Simon