How to parse message from module GSM ?

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+CMGL: 0,"REC READ","+84963225103",,"16/01/25,15:05:19+28"
003A00290020006D1EDB0069002000681ED300690020007300E1006E0067002001110061006E00670020007400ED006E00680020006800F90020007400721EC50020006D1EA500790020006E006700E000790020003A002900290020006D00E0002000731EE300200061006E00680020006C006F0020003A00330020006E00EA006E00200074

How to parse

003A00290020006D1EDB0069002000681ED300690020007300E1006E0067002001110061006E00670020007400ED006E00680020006800F90020007400721EC50020006D1EA500790020006E006700E000790020003A002900290020006D00E0002000731EE300200061006E00680020006C006F0020003A00330020006E00EA006E00200074

to text ?

What I have tried:

How to parse Message from module GSM ?

Posted 7-Aug-17 18:44pm

Member 12050240

Updated 7-Aug-17 22:45pm

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Mehdi Gholam 8-Aug-17 1:04am

Looks like 4 character/2 byte unicode values.

Member 12050240 8-Aug-17 1:34am

Cound you exam for me

Patrice T 8-Aug-17 2:43am

Hexadecimal encoded utf16 ?

Richard MacCutchan 8-Aug-17 3:47am

Check the documentation for the module that is generating the information.

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Jochen Arndt · Answer 1 · 2017-08-07T22:45:00

Search the net for "AT+CMGL". You will find descriptions for the list SMS messages command.

Those should also mention that there are two modes for the message output format: Text mode and PDU mode which can be selected with AT+CMGF.

So you might switch to text mode to get readable output.

Otheriwse you have to convert the hex data string. How to do this depends on the PDU format used by your modem (check the documentation) and which programming language you want to use.

Your data are obviously 16-bit hex values. So get sub strings of 4 characters, convert them to binary (e.g. using strtol() with C/C++) and write those values to a buffer. If the decoding is UCS2, conversion is simple because that is UTF-16 BE but converting the string will swap the bytes so that the result is UTF-16 LE as used by Windows internally and also supported by Linux. If it is something else it might be necessary to get a decoder (e.g. using a GSM library that supports the used encoding).

Related links:
Short Message Peer-to-Peer - Wikipedia[^]
SMS Alphabets · bitcoder/ruby_ucp Wiki · GitHub[^]