I have a Photon I have not used in a couple of months. It is plugged into the USB port of my Windows PC. It was flashing green and would not connect to the network. I used dfu-util to flash version 0.4.9 software (flashed with no problem). I held down the setup/mode button until the LED was fast blinking blue to remove any network credentials previously stored. Went to the Particle app on my iPad, put the photon in slow blinking blue/listen mode, set my iPad to the Photon device and can see the Photon connected and an IP set up to the device. But the Particle app continues to show the device Offline. I can’t program proper WiFi credentials into the device.
My other Photon that has been continually running an online application for a year, is properly showing Online, non-Tinker mode and has been running perfectly.
Any ideas? Is there a problem with the Wi-Fi chip on this Photon? What else can I try?