It looks like it was because location was turned off in my phone. Worked fine once I turned it on. Would be helpful if the app told you that rather than just hanging

ive got several HS100 sockets which say "V2.1" on them and work fine (firmware version 1.5.10) I've been given a couple of sockets which say "v1.0" on them and I am unable to configure them. The app...