Your comments

Roger, do you have an example GUI of this interface?

Brilliant, thank you - this is now working. The error was as described - although I would add that do not create a profile name when creating the Anonymous user - this is where I went wrong.

Using a Trial license on iridium (Driver type is custom HTTP - TCP) and using RAZBERRY Firmware v2.1.1 - If I use RAZBERRY Firmware 1.7.2 I can read the device on Iridium but not write to RAZBERRY