ESB on nRF21540DK

[JPhilippe]

We have already developed a wireless sensor application based on the ESB protocol.

Now we want to increase the range by adding an nRF21540.

We started by testing the sample https://developer.nordicsemi.com/nRF_Connect_SDK/doc/1.9.0/nrf/samples/esb/README.html. on a nRF21540DK board.

We read : "

You can add support for the nRF21540 front-end module to this sample by using one of the following options, depending on your hardware:

• Build the sample for one board that contains the nRF21540 FEM, such as nrf21540dk_nrf52840.

Unless we are mistaken, the FEM component is not activated : no activity on tx-en-gpios nor rx-en-gpios pins, checked with an oscilloscope.

Can you tell me how to make the FEM work with the ESB protocols?

Thnak You in advance for your help.

[ovrebekk]

Hi Jean Philippe

Possibly this is incorrect in the documentation. I can't find any reference to the nRF21540FEM in the ESB library implementation, so I am not sure if this is really supported. 

I will have to do some checking internally and get back to you.

Best regards
Torbjørn

[JPhilippe]

If FEM on ESB is not supported is GAZELL?

[ovrebekk]

Hi Jean Philippe

Apparently the FEM reference in the ESB library documentation was put there by mistake, the ESB library does not support FEM unfortunately. 

The Gazell library does not support this either. 

The Gazell library has a FEM interface that is compatible with an older Skyworks FEM device, but it is not updated to support the nRF21540. 

Best regards
Torbjørn

[JPhilippe]

Is there any chance that ESB and/or Gazell will be modified to support nRF21540 FEM in the short term?

[ovrebekk]

Hi 

For future updates and roadmaps you should contact one of our regional sales managers. If you don't already have a sales contact in Nordic just let me know, and I will forward you the details. 

Best regards
Torbjørn