PLS62-W sjam=0 failure | Telit Cinterion IoT Developer Community
February 27, 2020 - 2:43pm, 1748 views
Bit of puzzle.
I am having a fairly large quantity of PLS62W based boards fail the following command:
at^sjam=0,"a:/ipChange.jad",""
I get no OK or ERROR response. The code command simply does not execute.
MIDLET can be loaded and removed from the file system without issue, via USB and there appears to be no **********. On some of these boards other MIDLET can be loaded and executed correct. Sometime not.
Any ideas? I fear we have a maufacturing issue with these partcular boards.
Rob
Hello,
There should be some repy. But I suppose that you wait long enough.
How big is the MIDlet? Please check how much free spare there's on the file system.
Are there any other running applications? Is it possible to list runnign and installed apps? Can you execute other AT commands?
Regards,
Bartłomiej
The Midlet is small. Less than 50kB. Tons of space on the flash.
Nothing else is running. Module is powered up and configured. Once a network is seen this midlet is loaded and then executed.
Normally there should be JRC MIDlet always running. Some of the module's AT commands is implemented in JRC (but not SJAM command). Without JRC some commands may always reply just ERROR.
It's suspitions that you don't get answer for SJAM. Is it possible to execute other commands after no reply from SJAM? Is the MIDlet dgitally signed?
Anyway this all could mean that there may be some problem with these modules. I think that you may contact your distributor with this.
Regards,
Bartłomiej