Welcome to the JFYspot wiki!
As of 123solar v 1.8.1 you need to make a few tweaks to use jfyspot as it's not supported out of the box.
Here are the files you need (three protocol files and one modified file) 123solar1.8.1-addjfy.tar.gz
cd to the folder you've got 123solar in and then unpack the archive to do the business.
Well if you'd like to help developing jfyspot you'll notice there's a few things not really finished although it works sufficiently to get some data logged. Feel free to submit pull requests or contact me on jfyspot (then the usual) graham.auld.me.uk