how to receive more then 20 on nrf52832 over ble？

[Diiiiiii]

software : nRF5_SDK_14.0.0_3bcc1f7

hardware :nrf52832qfaa

example : ble_app_hrs_rscs_relay

i want use "example : ble_app_hrs_rscs_relay" to receive more then 20 byte, only change NRF_SDH_BLE_GATT_MAX_MTU_SIZE to 247?

do you have some examples?

thank you.

[haakonsh]

Try examples/ble_peripheral/ble_app_uart. 

See also how 

NRF_SDH_BLE_GATT_MAX_MTU_SIZE is used in nrf_ble_gatt.c of nRF5_SDK17.0