Hello, I have developed project with Q2686 and Open AT 6.63, this is old project, but this work fine.
My problem is DOTA, when I send sms to init DOTA process, the total process of DOTA is OK , but the new firmware version run very good for first five minutes and then the firmware crash, and reset the module. If I download application with AT+WDWL the firmware work fine.
Anyone has any suggestions on my problem?
Thanks.
Bye bye
Are you absolutely certain that you are using the same file with both DOTA and AT+WDWL 
Once the application is loaded, the method by which it got there should be entirely irrelevant.
Does the application reset just once, or every 5 minutes?
Hi aweneil, the software is absolutament the same, and the reset is every 5 minutes.
I have tested the problem with all Q2686 module with same 6.63, but I can not understand what could be the reason.
thanks, now the system go fine.
My problem is on “AT+WRST” that is not disabled when I finished the DOTA on system, my error.
Your link reference is very good for me.
Thanks awneil. 
Thanks awneil.
Thanks awneil.
It is a shame that there is no way for either the internal (Open-AT) application, nor any external application, to know that a reset was due to AT+WRST - see: https://forum.sierrawireless.com/t/how-to-detect-reset-due-to-at-wrst/4687/1
