ok, now flashed with: Firmware External Version: V2.21
Firmware Internal Version: V2.21b01
and the plug seems to be connecting to the mydlink service, since reporting online and firmware upgrade needed to Firmware External Version: V2.22
Firmware Internal Version: V2.22b05.
Once the upgrade happens no status is being reported tot he mydlink service

The device is on and connected (green led), but mydlink home app says offline.
So Firmware External Version: V2.21
Firmware Internal Version: V2.21b01
this version seems to be working but can not be used, because of the obligatory upgrade needed
Please, someone?