How to set the 630 to make it adapt to different countries

We are using 630 as our wifi module.
How can we set countries by using serial command and how the cmd influence wiz630 configure?
The second questuon is how to set up the minium Tx power to make it adapt to all the countries in the world?

Hello Xiaoxiu

Unfortunately, there is no way to change country code using serial command.
And, to change Tx Power with serial command, please refer to the command and below.