Multi-Tech Systems GPRS (MTMMC-G) User Manual

Chapter 13 – Specific AT Commands  

Multi-Tech Systems, Inc. Wireless GSM/GPRS AT Commands (Document Number S000293I) 

117 

 

Description:  

This command allows a tone to be played on the current speaker or on the buzzer. Frequency, gain and 
duration can be set. 

Stop playing. 

Play a tone 

<dest>   Sets the destination (mandatory if <mode>=1) 

Speaker 

Buzzer 

<freq>   Sets tone frequency (in Hz) (mandatory if <mode>=1).  
<freq2> Sets the 2

nd

 tone frequency (in Hz) (mandatory if <mode>=1). Available with speaker only. 

If <dest>=1 speaker: 
 

Range is 1 Hz to 3999 Hz  

If <dest>=2  buzzer: 

Range is between 1 Hz and 50000 Hz. 

<gain>  Sets the tone gain for the <freq>. The default is 9. 
<gain2> Sets the tone gain for the <freq2>. The default is 9. 
 

Range of values is 0 to 15 

0 0 

-0.25 

1 -0.5 -0.5 
2 -1  -1 
3 -1.5 -1.5 
4 -2  -2 
5 -3  -3 
6 -6  -6 
7 -9  -9 
8 -12 -12 
9 -15 -15 

10 -18  -18 
11 -24  -24 
12 -30  -30 
13 -36  -40 
14 -42 

-infinite 

15 -infinite 

-infinite 

<duration> Sets tone duration (unit of 100 ms).  
 

Range is 0 to 50. Default 0.  1 -> 0,1 s., 50 -> 5 s.) 

 

When this <duration>=0, the duration is infinite, and the tone can be stopped by 
AT+WTONE=0. 

Note:  The frequency <freq2> and gain <gain2> are allowed for the speaker only.   
Caution:  Hardware can only generate the following frequencies: 

Freq = (13 000 000 / (N * 64)) 

N: Interger value in the recommended range 1 to 2048. 

With N=1, the frequency 203 125 Hz is generated. 
With N=2048, the frequency 99.18 Hz is generated. 
Some noise problems have been detected if the frequency is below 100 Hz. 
The lowest frequency possible is 12 Hz. 

syntax: AT+WTONE=<mode>[,<dest>,<freq>,<gain>,<duration>[,<freq2>,[gain2>]]]]] 

OK or +CME ERROR: <err> 

AT+WTONE=1,1,300,9,50 
Note: Play a tone 

OK 
Note: Done 

AT+WTONE=0 
Note: Stop playing 

OK 
Note: Done 

AT+WTONE=? 
Note: Test command 

OK 
Note: Done 

AT+WTONE? 
Note: Current value 

ERROR 
 

AT+WTONE=1,1,300,9,50,600,9 
Note: Play a tone with 2 frequencies (allowed with speaker only) 

OK 
Note: Done 

AT+WTONE=1,2,300,9,50,600,9 
Note: Play a tone with 2 frequencies with the buzzer 

+CME ERROR: 3  (Note: Dual 
frequency for speaker only)