Hi!
Unfortunately no change in GSM shield behavior even after resetting.
The outbound SMS still do have cryptic characters on them.
Here is the output of the serial monitor when trying to reset:
Start Reset
End Reset
Ready for commands...
%-8%AT%13%%13%%10%
OK%13%%10%
AT&F%13%%13%%10%
OK%13%%10%
Any more ideas?
I also did activate debugging during sending the sms maybe that helps...
GSM gsmAccess(true);
Here is the output in serial monitor during sending
SMS Messages Sender
AT%13%
0 9>AT%13%%13%%10%OK%13%%10%
AT+CPIN=1234%13%
9 44>AT+CPIN=1234%13%%13%%10%+CPIN: READY%13%%10%%13%%10%OK%13%%10%
AT+CGREG?%13%
44 75>AT+CGREG?%13%%13%%10%+CGREG: 0,2%13%%10%%13%%10%OK%13%%10%
AT+CGREG?%13%
75 106>AT+CGREG?%13%%13%%10%+CGREG: 0,2%13%%10%%13%%10%OK%13%%10%
AT+CGREG?%13%
106 9>AT+CGREG?%13%%13%%10%+CGREG: 0,1%13%%10%%13%%10%OK%13%%10%
AT+IFC=1,1%13%
9 40>AT+IFC=1,1%13%%13%%10%OK%13%%10%%13%%10%Call Ready%13%%10%
AT+CMGF=1%13%
40 56>AT+CMGF=1%13%%13%%10%OK%13%%10%
AT+CLIP=1%13%
56 72>AT+CLIP=1%13%%13%%10%OK%13%%10%
ATE0%13%
72 83>ATE0%13%%13%%10%OK%13%%10%
AT+COLP=1%13%
83 89>%13%%10%OK%13%%10%
GSM initialized
Enter a mobile number: +4915112345678
Now, enter SMS content: SENDING
Message:
test
AT+CMGS="+4915112345678"%13%
89 93>%13%%10%>
test%26%%13%
89 113>%13%%10%> %13%%10%+CMGS: 113%13%%10%%13%%10%OK%13%%10%
COMPLETE!
Enter a mobile number:
As a result I still receive message string "??" on my mobile. (sms content is "test")