USB840X Fanstel dongle (enable PA/LNA) with ble_connectivity does not guarantee throughput.

[lammobile]

Hi Nordic team,

I'm using the USB840X dongle with ble_connectivity firmware (nRF5_SDK_15.3.0_59ac345\examples\connectivity\ble_connectivity\pca10059\ser_s140_usb_hci with hex/nRF5_SDK_15.3.0_connectivity.patch). On my PC, I communicate with the dongle using pc-ble-driver through the softdevice API.

• PC + USB840X: Acts as center
• Device (nRF52840): Acts as peripheral.

The USB840X has a BT840X module (nRF52840+Sky66112) with a SKY66112 power amplifier.

When the SKY66112 operates in bypass mode, the Device streams data to the PC, ensuring good throughput. However, enabling SKY66112 Control Codes for LNA seems to affect throughput negatively.

Is there a relationship between throughput and enabling LNA?

• BT840X SKY66112 Control Codes.

[lammobile]

Finally, it's working. I followed the suggestion from this ticket to allow the application to request connectivity to enable PA and LNA pins.

devzone.nordicsemi.com/.../74400

[Jared]

Aaah Good catch, must admit that I didn't notice that right away,

Thanks for returning with the solution, it will help others that face the same issue later,

regards

Jared 

[lammobile]

Hi Jared,

Thank you for your enthusiasm