In the previous tutorial, you created a program that gave you a simple REPL control interface to a servo motor. In this tutorial, you’ll add a slider to control the servo:
New Parts list:
First, set up the hardware using this schematic as your guide:
Connect the following…
Assuming you’re using the actual repo, open up
eg/slider-servo-control.js, or follow along here…
And that’s it!
node eg/slider-servo-control.js1 and try moving the slider up and down — the servo should rotate back and forth between 0-180 degrees (or whatever
scalingRange was provided).
Remember to watch this space for more tutorials!
Note: There is a known issue in where the Firmata protocol layer has issues freeing itself on the serial line which results in the program hanging in the ready state. For now,
^C to kill the hanging program and simply run it again.