I found the datasheet for the sensor which describes the data structure, but I also don't know what the "high" and "low" parts mean (see page 13). My Node.js code for reading the bytes from the sensor ...

I'm reading Learning Node.js by Marc Wandschneider. I've been able to do everything in the chapters up until Chapter 6, where we get to serving static pages, using Mustache.JS Granted, the book is 8 ...