I want to share a solution for connecting to Wi - Fi Photon with WEP , because I had the same problem and after 2 days of late nights and having read many issues in the community finally managed to connect .
Share the link which takes almost the entire solution , mdma (How to setup WEP secured network on the Photon) belongs to an authority on the subject : D , I suggest you do what he says , excepting one thing. When they have their full key example
00 0D 130AFE69B94B6
change the last part 130AFE69B94B6 by the equivalent of 26 HEX digits , ie would have:
000D31333041464536394239344236