Sorry Peter, I’m the only one that can answer your questions and don’t have the time to look into it yet. I can say that if you build the FloJackExample app from our github repo (https://github.com/flomio/flojack_ios) and put it on a iOS6 device you will be able to write an NDEF URL to a tag. That’s should show you what you need. It works on v10 firmware.
The TagWrite command as written from the FloJackExample app should reveal the opcode arguments as they currently work. Not sure why this is not working for you. Short of giving you access to the Flojack firmware repo, there’s not much more I can do at the moment. This code was written by someone that’s no longer with us, so I have to pour through it to be of much help. Unfortunately, I won’t be able to get to that until I finish the FloBLE firmware which is currently my top priority.
