The AP password can be difficult to put in when blanked out with stars..and frustrating when you have to keep inputting due to failed connections during initial setup.

So you can try the following:-

1) Use the GUI Keyboard to input a unique name for the DMR.
2) In Network Setup select Network Name change..and input the AP password.  This will be in the open, so that mistakes can be seen and edited.  When OK'd..the password will be displayed as the Network Name..and will remain in the GUI Keybaord store.   So now select Network Name change again..and use the DMR name stored from earlier.
3) Now go into Wireless Setup and select the AP. The GUI keybaord will appear..and the AP Password is both visible and selectable from the input store.