COM AT+CLVL: Loudspeaker volume level
AT+CLVL=?
WAIT FOR OK
COM try to set levels 0..4
AT+CLVL=0
WAIT FOR OK
AT+CLVL?
WAIT FOR +CLVL: 0
AT+CLVL=1
WAIT FOR OK
AT+CLVL?
WAIT FOR +CLVL: 1
AT+CLVL=2
WAIT FOR OK
AT+CLVL?
WAIT FOR +CLVL: 2
AT+CLVL=3
WAIT FOR OK
AT+CLVL?
WAIT FOR +CLVL: 3
AT+CLVL=4
WAIT FOR OK
AT+CLVL?
WAIT FOR +CLVL: 4
AT+CLVL=5
WAIT FOR OK
AT+CLVL?
WAIT FOR +CLVL: 5


