I tested ble_app_att_mtu_throughput_test code with 52840 EVB for BLE5 Long Range as below site.
I have a same result_8dbm.hex binary version and compiled source SDK15.0.0 with Soft Device 6.0.0, when I check a distance.
But I got a different result when I compiled the ble_app_att_mtu_throughput_test on SDK 15.3.0 with Soft Device 6.1.1.
The distance is reduced a lot.
All .c files are the same but the sdk_config.h file is different, but I think that there is no relation about BLE5.
Could you give me the ble_app_att_mtu_throughput_test.zip based on SDK15.3.0 using SD 6.1.1?