This is an Excel spreadsheet with some VBA code, that that gives you simple access to all your Cayenne data inside a spreadsheet with just your username/password, and a few clicks. You can load hour/day/week data series of your sensors, send data to Cayenne which can control your devices, and build fancy displays with text and graphics containing current values and history of your sensors.
It essentially gives access to your data without going through the website.
It is just a spreadsheet, not a service, so your information is just on your computer, interacting with mydevices.com databases.
The program displays all the REST GETs and POSTs, and then the raw REST responses, and then pulls apart the responses into the spreadsheets. And it creates nice Excel format timestamps for your timezone.
You have to download the spreadsheet from github, and then say Yes to running macros.
Of course, you can say no to macros, and read the code to see what it does first.
The green areas are for data entry, the orange is responses from Cayenne.
If you build some nice displays, you could post a screenshot of your artwork