?<cr>
The ? command outputs a listing of device information.
Example:
>?
Device Name : HMM100
SW Name : HM100
SW model : VAISALA
SW version : 1.1.10.3031
Serial number :
Calibrated :
Address : 0
Operating mode : 3W
Status : ON
>
If the module is in poll mode, but a connection has not been opened using the OPEN command, issue the ?? command.
??<cr>
For a description of the serial interface modes, see Set Serial Interface Mode.