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SIM300 spurious output after AT+CMGR=

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MartinLintzgy

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at+cmgr

I have been using SIM300 for a while now, with no problems.
However from time to time i get a spurious output when reading sim card in pdu mode.
Here is snippet form RS232 sniffer.
Note that AT+CNMI=0,1,0,1,0
________________________________________

AT+CMGR=4
+CMT: ,13
0004008000F00000000000000000


+CMGR: 0,"54454B353639",159
0791538386000200240C9153831657364600F7909051115104408C00000B0F0000000100000000000002000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000007F2400000000000000000000000000000000000000
0000000000163E

OK
_________________________________
The text in RED should not be there. Anyone seen this before ?
The junk response between read request and the read data can vary.
I have also seen the <CRLF>OK appear BEFORE the +CMGR response instead of after.
Is there a work around ?

-mvl
 

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