Part Number:CC3220MOD
I was doing some field testing an ran into a very repeatable issue, at the time, that I thought was temperature related. CC3220 is configured in AP mode. I would connect to it the first time after power up and view the on board web page and things would work as expected. Then I disconnected and reconnected and DHCP appeared to do a release but would not hand out a new IP address. I also found it strange that even giving my phone a static IP, it would not let me view the on board web page. It always broadcasts is SSID and my code appears to be running because it is servicing interrupts as expected even in this strange state. I would power cycle the part and get the same behavior. I can connect the first time, but then on a second connection, it would fail.
Temperatures outside were 38-40C and probably a bit warmer in the enclosure due to solar load. I tested a device in an oven at 75-80C that was having issues outside and found it to have no issues in the oven, so I don't think it is temperature related as I thought. Any ideas on what might cause this? I was thinking it could be power related, but I think the power situation is pretty good. It is being powered by a large 12V lead acid battery and converted to 3.3V by a TPS54202 with 44uF of output capacitance.