Indoor Cam connectivity issues and now will not reset

I bought 2 indoor cams about a month ago. the first cam works well with no connectivity issues. The second camera worked for about a day, then would show offline. I would reconnect to the wifi and it would work for about another day then it would show offline once again. This time I moved the cam closer to the wifi AP to see if it was a signal issue, setup the camera, and a day later, it would show offline. This time when I went to reboot the camera, it would not go into setup mode. I also noticed that the blue light would come on for 3 seconds and then turn back on every 30 seconds. I have tried to hold down the button for 20-30 second, even unplugged the device, and it still would do this 3 second blue light every 30 seconds. Please advise.