Expected throughput on nrf52840

[Gary]

Hi,

I have two nrf52840 boards and I am using the ble_app_att_mtu_throughput test app. The tests seem to be working OK, but I am not getting the throughput I was expecting. The boards are next to each other.

With BLE_GAP_PHY_2MBPS I get 1046.48 Kbps, which I guess it in the right ball park, but for BLE_GAP_PHY_1MBPS I am only getting 262.27 Kbps.

Also for BLE_GAP_PHY_CODED with the boards next to each other I am only getting 26.20 Kbps.

I was expecting more for 1MBPS and CODED. I have tried with S140_nrf52840_5.0.0-2.alpha and S140_nrf52840_5.0.0-3.alpha and the numbers seem to be around the same.

Any thoughts, comment suggestions?

Thanks, Gary.

[Gary]

Hi Bjorn, yes I have both Data Length Extensions or Connection Event extension enabled. What throughput should I be expecting? 125Kbps?