The text has the following
Reading Simple Sensors The steps below illustrate how to read data from the GPS sensor in an Edge Action and send the data to the cloud. Note: Before you continue, you must first have an Observation that reads from the /location/coordinates/value Resource, and has been set set to Send to an Edge Action.
And then proceeds to talk about light sensor data
8. Click the Example tab. Octave provides a number of example scripts that you can use as a starting point. 9. Select Example > Show the light value on LCD
Or have I misunderstood something?