How To: writing sms with minicom or hyperterminal

[Halftux]

C8 32 9B FD 06 35 DF F4 B7 FC CD 0E 9B C3 EE 39,

I managed to write sms with minicom and hyperterminal. I used the A780 USB modem. So my welcome message is 7bit gsm code .

It seems a textmode is not supported by the A780.

So here the complicated way with PDU.

Start minicom or hyperterminal.


AT+CSCS? gives you the actual coding alphabet

AT+CSCS=? gives you all settings

"ASCII"
"GSM" 7 bit
"UCS2" 16 bit
"HEX" 8 bit

AT+CSCS="GSM" set new value

AT+CMGS=30

After this send command it comes another prompt >
now you need to type your message in PDU format and send it with crtl+z.
The red 30 in the send command needs to be changed.
It is the count of the octets in your string.


So here is the Example

0011000C916451131525060000AA12C8329BFD0635DFF4B7FCCD0E9BC3EE39

the red numbers are the octets for the send command 30.

0011000C916451131525060000AA12C8329BFD0635DFF4B7FCCD0E9BC3EE39

0C length (12) from the telephone number

91 indicates international format of the phone number

645113152506 telephone number real number: 461531515260

When the number is odd for example 11 counts you need to fill up with F so you get a octet.

6451131525F6 real number: 46153151526
So put in your number and send it to yourself. Then you will know my welcome message.

AT+CSCS="GSM"
AT+CMGS=30 
> 0011000C916451131525060000AA12C8329BFD0635DFF4B7FCCD0E9BC3EE39<ctrl+z>

So here the full explanation:
SMS and the PDU format