Disable PA/LNA after Connection

[Dave_couling]

I use a PA/LNA dur9ing advertising but would like to disable it during connection.  I use the sd_ble_opt_set API which works fine to enable GPIO toggling.  However to disable after a connection I used the code recommended in this post https://devzone.nordicsemi.com/f/nordic-q-a/51330/disable-softdevice-control-of-the-pa-lna-control-lines-and-returning-to-gpios   however the sd_ble_opt_set  always returns NRF_ERROR_INVALID_STATE.  I tried moving the call to main context, after an app_timer timeout.  But it always seems to return invalid.  Is there a better way to enable/disable the PA/LNA?

[Kenneth]

It is not possible to disable the lna/pa pins while in a connection, from the api documentation it says: "Setting this option while the radio is in use (i.e. any of the roles are active) may have undefined consequences and must be avoided by the application."

Kenneth

[Dave_couling]

Could I subscribe to radio notifications to assure this occurs between radio events?

[Kenneth]

I believe there is a ble_radio_notification.c/h file in the nRF5 SDK that can be used, make sure to call it before you start to advertise.