Thank you @eric, I appreciate it.
I spent the entire day today (4-5 hours) trying to get the shield to work with my DK. It starts working, I change something and then it stops working.
I have no idea what is going on and why it is so finicky. I am using the basic code in the tutorial and have the DK on a simple breadboard and also tried the coin shield. The shield connects to the photon all the time, but I can not get the DK to connect to the shield. I have basically no idea why it works sometimes but most of the time it does not. The DK just keeps flashing green ,,,,,
Has the DK, shield and photon been tested with the latest firmware?
What else should I try?