This video demonstrates how to create a wiring diagram for a data logger system using a spreadsheet. The spreadsheet contains tabs featuring images of the wiring panels for the CR1000X, CR6, CR300, CR310, and CR350 dataloggers. Employing a spreadsheet to document wiring allows for the easy addition of notes and graphics, improving clarity. It is also easy to send the diagram and notes to a printer or to a PDF file. The example Excel template used in this video is available at: https://www.campbellsci.com/downloads/datalogger-wiring-template.