I have 4 Cores (and 2 Photons). I unclaimed one of my Cores, and did a factory reset, and sent it to a friend to let him play around with it. Unfortunately he never found the time to use it, and returned it to me. He never claimed it.
When I plug in the Core, it blinks Blue (“listening” mode). However when I attempt to use the Spark Core app on my iPhone to claim and set it up, the app is unable to find the Core. I’ve tried all sorts of resets and modes. I’ve also verified that I’m on my 2.4 GHz.
All other cores are connecting to my network just fine.
Any help would be greatly appreciated.