ftp download problem using EHS6 on concept board | Telit Cinterion IoT Developer Community
May 19, 2014 - 2:25pm, 9862 views
Hi,
Just received the concept board last week and have been trying to get ftp file download to work. I can ping the server from a java midlet (proving that I can get an internet connection) but the ftp function seems to get stuck after I receive:
===
ATEvent
^SIS: 0,0,2100,"Ftp open(ftp.***.com:21)"
===
These are my lines of code to start the ftp download:
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m_Cmd.send("AT^SISO=0\r", new EHS6_test.RspListener());
Thread.sleep(30000); // 30 second timeout
===
According to the example on page 254 in "Cinterion EHS6 AT Command Set" I should get something like this:
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AT^SISO=1 Open the service.
OK Bearer is established, service is getting started.
^SIS: 1,0,2100,"Ftp open(ftp.heise.de:21)" "^SIS" URC with 2100 (FTP) indicates download status.
^SIS: 1,0,2100,"220 Hallo auf ftp.heise.de."
^SIS: 1,0,2100,"FTP Login OK"
===
Here is the content of my debug session (Netbeans 8.0):
===
startApp
Start of AT command sequence...
Received async response:
AT+CREG?
+CREG: 0,5
OK
Received async response:
AT+CGATT?
+CGATT: 1
OK
Received async response:
AT^sics=0,conType,"GPRS0"
OK
Received async response:
AT^SICS=0,inactTO,"20"
OK
Received async response:
AT^SICS=0,user,"default"
OK
Received async response:
AT^SICS=0,passwd,""
OK
Received async response:
AT^SICS=0,apn,"stream.co.uk"
OK
Received async response:
AT^SICS=0,dns1,"8.8.8.8"
OK
Received async response:
AT^SISS=0,srvType,"Ftp"
OK
Received async response:
AT^SISS=0,conId,"0"
OK
Received async response:
AT^SISS=0,address,"ftp://***.com"
OK
Received async response:
AT^SISS=0,cmd,"fget"
OK
Received async response:
AT^SISS=0,user,"***"
OK
Received async response:
AT^SISS=0,passwd,"***"
OK
Received async response:
AT^SISS=0,path,"file:///a:/data/"
OK
Received async response:
AT^SISS=0,files,"*.txt"
OK
RINGChanged true
Received async response:
AT^SISO=0
OK
ATEvent
^SIS: 0,0,2100,"Ftp open(ftp.***.com:21)"
RINGChanged false
destroyApp(true)
Streams and connection closed
End of debug session. Emulator is closed!
===
Any idea why I see this problem?
Many thanks for any feedback.
May 19 2014 - 3:29pm
Hello,
does this occur also when using internet service directly over AT command interface, not from Java midlet? To exclude MIDlet's fault it would be very handy if you could provide reproduction log with timestamps from AT command interface. Please also provide the answer to the commands AT^SCFG?, AT^SISO?, AT^SISI?
Regards
Jedrzej
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May 19 2014 - 3:50pm
Hi Jedrzej,
Thanks for your feedback.
I'll come back with a more detailed log, in the mean time here are the outputs of the three AT- commands:
AT^SCFG? output:
===
^SCFG: "Call/ECC","0"
^SCFG: "GPRS/AutoAttach","enabled"
^SCFG: "Gpio/mode/ASC1","std"
^SCFG: "Gpio/mode/DAI","gpio"
^SCFG: "Gpio/mode/DCD0","std"
^SCFG: "Gpio/mode/DSR0","std"
^SCFG: "Gpio/mode/DTR0","std"
^SCFG: "Gpio/mode/FSR","gpio"
^SCFG: "Gpio/mode/HSIC","rsv"
^SCFG: "Gpio/mode/PULSE","gpio"
^SCFG: "Gpio/mode/PWM","gpio"
^SCFG: "Gpio/mode/RING0","std"
^SCFG: "Gpio/mode/SPI","rsv"
^SCFG: "Gpio/mode/SYNC","gpio"
^SCFG: "Ident/Manufacturer","Cinterion"
^SCFG: "Ident/Product","EHS6"
^SCFG: "MEShutdown/Fso","0"
^SCFG: "MEopMode/SoR","off"
^SCFG: "Radio/Band","511"
^SCFG: "Radio/OutputPowerReduction","4"
^SCFG: "Serial/Interface/Allocation","1","1"
^SCFG: "Serial/USB/DDD","0","0","0409","1E2D","0058","Cinterion Wireless Modules","EHx",""
^SCFG: "Tcp/IRT","3"
^SCFG: "Tcp/MR","10"
^SCFG: "Tcp/OT","6000"
^SCFG: "Tcp/WithURCs","on"
^SCFG: "Trace/Syslog/Otap","0"
^SCFG: "URC/Ringline","local"
^SCFG: "URC/Ringline/ActiveTime","2"
^SCFG: "Userware/Autostart","1"
^SCFG: "Userware/Autostart/Delay","0"
^SCFG: "Userware/DebugInterface","192.168.244.1","192.168.244.2","0"
^SCFG: "Userware/DebugMode","on"
^SCFG: "Userware/Passwd",
^SCFG: "Userware/Stdout","null",,,,"off"
^SCFG: "Userware/Watchdog","0"
===
AT^SISO? output:
===
^SISO: 0,"Ftp"
^SISO: 1,""
^SISO: 2,""
^SISO: 3,""
^SISO: 4,""
^SISO: 5,""
^SISO: 6,""
^SISO: 7,""
^SISO: 8,""
^SISO: 9,""
===
AT^SISI? output:
===
^SISI: 0,"Ftp"
===
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May 19 2014 - 5:29pm
I have now tried access via ASC0 using AT_Commands and this has given me some more clues:
log:
===
19/05/2014 13:12:12.101 [RX] -
^SYSLOADING
^SYSSTART
+PBREADY
19/05/2014 13:12:42.883 [TX] - AT+CREG?
19/05/2014 13:12:42.901 [RX] - AT+CREG?
+CREG: 0,5
OK
19/05/2014 13:12:45.690 [TX] - AT+CGATT?
19/05/2014 13:12:45.705 [RX] - AT+CGATT?
+CGATT: 1
OK
19/05/2014 13:13:16.502 [TX] - AT^sics=0,conType,"GPRS0"
19/05/2014 13:13:16.519 [RX] - AT^sics=0,conType,"GPRS0"
OK
19/05/2014 13:13:19.793 [TX] - AT^SICS=0,inactTO,"20"
19/05/2014 13:13:19.808 [RX] - AT^SICS=0,inactTO,"20"
OK
19/05/2014 13:13:21.276 [TX] - AT^SICS=0,user,"default"
19/05/2014 13:13:21.294 [RX] - AT^SICS=0,user,"default"
OK
19/05/2014 13:13:23.179 [TX] - AT^SICS=0,passwd,""
19/05/2014 13:13:23.193 [RX] - AT^SICS=0,passwd,""
OK
19/05/2014 13:13:49.266 [TX] - AT^SICS=0,apn,"stream.co.uk"
19/05/2014 13:13:49.278 [RX] - AT^SICS=0,apn,"stream.co.uk"
OK
19/05/2014 13:13:53.656 [TX] - AT^SICS=0,dns1,"8.8.8.8"
19/05/2014 13:13:53.673 [RX] - AT^SICS=0,dns1,"8.8.8.8"
OK
19/05/2014 13:13:56.448 [TX] - AT^SISS=0,srvType,"Ftp"
19/05/2014 13:13:56.467 [RX] - AT^SISS=0,srvType,"Ftp"
OK
19/05/2014 13:14:00.130 [TX] - AT^SISS=0,conId,"0"
19/05/2014 13:14:00.145 [RX] - AT^SISS=0,conId,"0"
OK
19/05/2014 13:14:03.172 [TX] - AT^SISS=0,address,"ftp://***.com"
19/05/2014 13:14:03.187 [RX] - AT^SISS=0,address,"ftp://***.com"
OK
19/05/2014 13:14:06.277 [TX] - AT^SISS=0,cmd,"fget"
19/05/2014 13:14:06.295 [RX] - AT^SISS=0,cmd,"fget"
OK
19/05/2014 13:14:09.288 [TX] - AT^SISS=0,user,"***"
19/05/2014 13:14:09.302 [RX] - AT^SISS=0,user,"***"
OK
19/05/2014 13:14:11.394 [TX] - AT^SISS=0,passwd,"***"
19/05/2014 13:14:11.412 [RX] - AT^SISS=0,passwd,"***"
OK
19/05/2014 13:14:13.594 [TX] - AT^SISS=0,path,"file:///a:/data/"
19/05/2014 13:14:13.613 [RX] - AT^SISS=0,path,"file:///a:/data/"
OK
19/05/2014 13:14:16.371 [TX] - AT^SISS=0,files,"ms_test.txt"
19/05/2014 13:14:16.389 [RX] - AT^SISS=0,files,"ms_test.txt"
OK
19/05/2014 13:14:18.789 [TX] - AT^SISO=0
19/05/2014 13:14:18.808 [RX] - AT^SISO=0
OK
^SIS: 0,0,2100,"Ftp open(***.com:21)"
^SIS: 0,0,2100,"220 Microsoft FTP Service"
^SIS: 0,0,2100,"FTP Login OK"
^SIS: 0,0,2100,"fget ms_test.txt"
^SIS: 0,0,100,"FTP-ERR: 550 The system cannot find the file specified. "
Strangely the file "ms_test.txt" exists on the file server root directory and I can see it using filezilla (desktop ftp client). Any idea why it cannot find it, btw is the name case sensitive? I have used the correct case in the name...
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May 19 2014 - 6:50pm
Got it! This error is caused by your file name. As you're using GSM character set underscore sign should be escaped by \11, so you should invoke AT^SISS=0,"files","ms\11test.txt" instead of AT^SISS=0,files,"ms_test.txt".
Regards
Jedrzej
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May 19 2014 - 7:42pm
Great, thanks Jedrzej, it now works! :-) I'll be aware of this one now...
I have a couple more questions though, hopefully they can be answered, too:
1. Using AT-Commands from within a terminal showed me the error:
^SIS: 0,0,100,"FTP-ERR: 550 The system cannot find the file specified. "
Is there a way to enable these error messages to appear in the debug window in Netbeans? It would make debugging quite difficult if not.
2. The first time I define ftp profile parameters with AT^SISS=0,parameter,... I get "ok", any subsequent attempt to issue this command results in an error, as does re-issuing AT^SISO=0.
AT^SISO? shows ^SISO: 0,"Ftp",6,1,16,0,"x.x.x.x:4097","x.x.x.x:21"
AT^SICI? shows ^SICI: 0,0,1,"0.0.0.0"
Could it be that the service is still active and therefore does not permit the changing of its parameters?
If true, what command do I need to issue to stop the service, if any?
Many thanks for your help,
Micha
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May 20 2014 - 12:56pm
You're welcome, nice to see it did help.
First of all I have a general advice for you. As I can see you're using Internet Service. Alternative solution is creating MIDlet that uses internet access API - available protocols are HTTP, TCP Socket and UDP. Unfortunately there is no FTP interface, but as it is more convenient and efficient to use these interfaces rather then Internet Services over ATCommand class, maybe it's worth considering to reorganize your project to use them instead?
Ad.1. If you're using ATCommandListener implementation it generally should be caught and processed in ATEvent method. It's hard to say what's gone wrong. Could you share your code?
Ad.2. Please refer to parameter of AT^SISO? response. According to AT spec it takes one of following values:
- 2 Allocated
- 3 Connecting
- 4 Up/Listening
- 5 Closing
- 6 Down
- 7 Alerting
- 8 Connected
- 9 Released
After the services finishes it always goes to the state Down (6) which indicates no more data will be exchanged. You have to invoke AT^SISC= so the service goes back to state Allocated (2) and may be opened again.
Regards
Jedrzej
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May 20 2014 - 6:29pm
Hi Jedrzej,
Thanks for all the infos.
I have been considering your suggestion to use the internet access API and have tried to collect all relevant information about which APIs are supported by the EHS6.
http://docs.oracle.com/javame/dev-tools/jme-sdk-3.2/dev-guide/platforms.htm
states that "The IMP-NG stack supports the following JCP APIs: JSRs 75, 120, 172, 177, 179, 257, and 280"
Does this apply to the EHS6, too, as only JSR75, 177 and 280 are explicitly mentioned in the Gemalto docs?
Which API includes the internet access you mentioned in your last post?
Many thanks,
Micha
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May 20 2014 - 7:09pm
Only libraries described in Gemalto documentation is applicable.
By Internet access API I was meaning HttpConnection, HttpsConnection, ContentConnection, SocketConnection, UDPDatagramConnection and NetExtension.
Regards
Jedrzej
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