I have an HL6/HL8 development kit, and I’m finding that the HL8548 inserts an extra space at the beginning of the SMS text in the response to AT+CMGR when extra parameters are enabled by AT+CSDH=1.
First, for comparison, here is a log from the HL6528, showing the outputs of AT+CMGL=“ALL” and AT+CMGR=32, after both AT+CSDH=0 and AT+CSDH=1. Note that the text “This is a test” always start in column 0, and contains 14 characters, in agreement with the final extra parameter on the +CMGR and +CMGL response lines after AT+CSDH=1.
ATI
HL6528
OK
AT+CMGF=1
OK
AT+CSDH=0
OK
AT+CMGL="ALL"
+CMGL: 32,"REC READ","+xxxxxxxxxxxx","P Mobile","15/03/03,16:10:03+00"
This is a test
OK
AT+CMGR=32
+CMGR: "REC READ","+xxxxxxxxxxxx","P Mobile","15/03/03,16:10:03+00"
This is a test
OK
AT+CSDH=1
OK
AT+CMGL="ALL"
+CMGL: 32,"REC READ","+xxxxxxxxxxxx","P Mobile","15/03/03,16:10:03+00",145,14
This is a test
OK
AT+CMGR=32
+CMGR: "REC READ","+xxxxxxxxxxxx","P Mobile","15/03/03,16:10:03+00",145,32,0,0,"+447782000800",145,14
This is a test
OKNow, here is the output of the same commands on the HL8548. Note that this time, after AT+CSDH=1, the SMS text following the response to AT+CMGR=32 has a space inserted before it: " This is a test", and thus contains 15 characters, even though the final parameter of the +CMGR response is still 14. Is this a bug?
ATI
HL8548
OK
ATI3
RHL85xx.5.5.13.0.201501302001.x6250_1
OK
AT+CMGF=1
OK
AT+CSDH=0
OK
AT+CMGL="ALL"
+CMGL: 32,"REC READ","+xxxxxxxxxxxx","","15/03/03,16:10:03+00"
This is a test
OK
AT+CMGR=32
+CMGR: "REC READ","+xxxxxxxxxxxx",,"15/03/03,16:10:03+00"
This is a test
OK
AT+CSDH=1
OK
AT+CMGL="ALL"
+CMGL: 32,"REC READ","+xxxxxxxxxxxx","","15/03/03,16:10:03+00",145,14
This is a test
OK
AT+CMGR=32
+CMGR: "REC READ","+xxxxxxxxxxxx",,"15/03/03,16:10:03+00",145,12,0,0,"+447782000800",145,14
This is a test
OK