Hi
This is a follow-up on a post a colleague made in 2013, see [url]https://forum.sierrawireless.com/t/diverting-sms-messages/550/1]
We are still seeing devices stuck in a state were most AT commands return CME Errors 536 and 515. We are still not sure what the events are that leads up to the lock-up, as we’ve never been able to reproduce it in the lab. With around 1500 devices out in the field, we get one every few weeks that is in this state. We have tried to handle this state in our OpenAT app, but so far we’ve been unsucessful, as it persists accross resets (using AT+CFUN=1,1). The only way up to now to get the device going again is by issuing a AT+WOPEN=0, AT+CFUN=1,1 and AT+WOPEN=1 sequence.
The question is: Is there any way we can recover from this state when we detect it in our app?
Below is the output from a few commands. AT+WSTR seems to indicate that the firmware initialization was never completed.
"DWL","V10c05","","Sierra Wireless",62640,"051513 10:45","a0836b50","00010000"
"FW","FW_752_34_3.SL6087G","R7.52.0.201306260837.SL6087","Sierra Wireless",673436,"062613 08:37","89796368","001d0000"
"MODEM","1.3.36","201306260837.SL6087","Sierra Wireless",1713240,"062613 08:37","85a2fb97","00020000"
"OAT","2.13.408.1","Sefeko Mercury","Gendac (Pty) Ltd",1840120,"040815 18:09","765c6451","002a0000"
-"Developer Studio","2.3.2.201310241753"
-"Open AT Application Framework package","2.52.0.201307100830"
-"Open AT OS Package","6.52.0.201306271400"
-"Firmware Package","7.52.0.201306260837"
-"Internet Library Package","5.56.0.201305170830"
-"Security Library Package","2.2.0.201306261000"
"ROM","800000"
"RAM","200000"
"DWLNAME","SL6087"
at+wlerr=1
+WLERR: 0,1,"Except RTX: task IDLE, out of kernel envelopes , caller = 0x1577 "
+WLERR: 0,2,"Except RTX: task IDLE, out of kernel envelopes , caller = 0x1577 "
+WLERR: 0,3,"Except RTX: task IDLE, out of kernel envelopes , caller = 0x1577 "
+WLERR: 0,4,"Except RTX: task IDLE, out of kernel envelopes , caller = 0x1577 "
+WLERR: 1,0
+WLERR: 2,292,32760,52
at+cpin?
+CME ERROR: 536
at+csq
+CME ERROR: 30
at+wstr=1
+WSTR: 1,1
at+wstr=2
+WSTR: 2,0
at+cced=0,5
+CME ERROR: 515
at+creg?
at
+CME ERROR: 515
AT$ARMEE?
+CME ERROR: 515
AT+CCLK?
+CME ERROR: 515
AT+WBHV?
+CME ERROR: 515
at&v
+CME ERROR: 515
at+cops?
+CME ERROR: 515
at+wopen=6
+WOPEN: 6,2880,1984
OK
at+wopen=9
+WOPEN: 9,0,1984