As an off-Topic to my main question, regarding Robodyn's Uno+Wifi - it seems that Wifi does not work ( fail to connect and fail find any network ).

Juraj advised to use External Antenna ( did not work ) and try to make an RF calibration as shown on espressif's site. Which I fail to understand how it is done.

a) Can anyone help with RF Calibration ?

b) Might it be another reason for that ?

Guy