CC3200STK-WIFIMK: CC3200STK-WIFIMK: Stop working after a few hours

Part Number:CC3200STK-WIFIMK

I'm trying to use CC3200STK-WIFIMK as a way to collect environmental data. I know this is supposed for demo purpose only, but it's the best solution I found on the market.

I have a pythons script that pulls sensor data from 6 SensorTags from "http://[sensortag_ip]/param_sensortag_poll.html" once every one minute. However, it seems that one or two SensorTags will always stop working after a few hours. When the SensorTag stop working, I can still access the WiFi management interface by going to "http://[sensortag_ip]/", but if I access any sensor data from "http://[sensortag_ip]/param_sensortag_poll.html" or "http://[sensortag_ip]/sensortag.html", the connection will simply timeout without giving me any data back.

Any idea why this is not working?

Thanks in advance