Sorry you’re having trouble setting up your Core. Just for reference in the future, the first thing I want to do is point you towards our troubleshooting section, so you can get immediate support in the future.
A couple of questions for you. It seems like, early on, you were able to successfully communicate Wi-Fi credentials to your Core, but unable to join the network. What kind of network do you have? WEP, WPA, WPA2? We’ve discovered and are working on a fix for an issue with connecting to WEP encrypted networks. Do you have a u.FL Core, or a Core with a chip antenna?
When you complete a factory reset, the saved network information should be erased, and the Core should revert to the version of firmware that I had when it left the factory. You should not have to reinstall any of the software manually. You will know the Core is in DFU mode if you see RGB LED flashing yellow. For a better understanding of the LED colors and what they mean, visit the link below:
If you complete a factory reset (instructions below), the Core should return to it’s factory original behavior and start flashing blue. Does this occur?
Hold down the MODE button, tap on the RESET button and wait for ten seconds to do a Factory Reset, where the Core is reprogrammed with the software that was installed on the Core in the factory (the Tinker application). The LED should turn white for three seconds and begin flashing quickly; when the LED switches to another color the Core has been reset. This is useful if you encounter bugs with your firmware, or if you just want to get back to Tinker.