RSSI of PCA10112 was weaker than RSSI of PC10056

[Jeffery]

Hi Nordic team

I tried SDK Connect v1.8.0 ble_peripheral_lbs_coex sample.

It found advertising signal was very weak. The distance between PCA10112 and my phone was 1 meter. RSSI was only -86dBm.

For PCA10056, at same situation, RSSI was -45dBm.

My PCA10112 was v0.9.1 version.

What is the reason? Shall I add configurations at prj.conf file to enable FEM?

Jeffery

[Jeffery]

Hi 

  I found you will posted below context at nrf connect bluetooth examples which supported nrf21540dk_nrf52840.

But, I did't understand how to follow it.

Could you mind making a tutorial to teach us how to set up 21540 FEM at ncs project?

Thanks

[Stian Røed Hafskjold]

Hi, I took over this case since Jared is on vacation.

Did you figure out how to add the nRF21540 to the NCS project? This page contains information about what you are trying to do: Working with RF front-end modules

And here is a tutorial on how to add the description to the devicetree: http://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/ug_radio_fem.html?highlight=nrf21540#adding-support-for-nrf21540

The description can be added to a .overlay file in the project folder. The filename should be *target*.overlay, where *target* is the target you are compiling for.

Best regards,
Stian