You should ask this question in the help/support forum.
Here are some links I found:
https://www.chess.com/news/view/play-live-chess-from-your-dgt-board
https://www.chess.com/forum/view/chess-equipment/dgt-play-is-enabled-in-chess-com-beta?page=1
https://www.chess.com/clubs/forum/view/how-to-use-dgt-board-and-chrome-extension-correctly
thanks, but I've already done with this problem 
just install dgt livechess cloud beta, turn on dgt in chess.com live options, and optional -> install chess.com voice commands addon in chrome for announce moves (so you no need to watch on screen). And that's it
I might be able to help, check out an app I developed for playing with DGT board on Chess.com
https://www.chess.com/forum/view/chess-equipment/new-dgt-for-chess-com-macos-app-unofficial
Hello. I will buy DGT smart board in a few days. But I have some questions. I like to play on chess.com live games. I know that there is option for DGT, but what should I install first? Drivers from CD that they will send me or livechess cloud beta or normal dgt livechess software? I saw on youtube that some guy install livechess cloud beta to be able to play live on chess.com, but don't know if i need to install that or that and something else. I'll be installing voice addon for chrome, but this is easy part
Please help.