In this tutorial, I will show you how to make a simple proximity detection device using the Particle Argon and the Grove Starter Kit for Particle Mesh. The goal of this project is to use the ultrasonic range finder to measure the distance to an object from my Argon.
I'll also show you how to set a distance threshold, so when any thing comes close to your Argon, an RGB LED will illuminate. There's no complicated wiring necessary and you don't need a soldering iron. This project takes advantage of the plug-and-play modularity the Grove system. You'll have your detector built in minutes regardless of your familiarity with circuits and I have all the code ready for you to try with a click of your mouse.
Attach your Particle Argon to the Grove FeatherWing adapter. Then wire the Grove modules to the FeatherWing as listed in the table.
Click this link to open the Particle Web IDE and the code for this project. To import the code to your Particle account, click the COPY THIS APP button on the left of the screen. Next, connect your Argon to your laptop with your kit's included micro USB cable. With the connection made, click the lightning bolt icon in the top left of the Web IDE. As soon as you click, your project source code will be compiled in the cloud into a binary file — often called firmware. compile the project source code and send the binary files to your Argon. That's it. Assuming you've wired your project according to the table above, your 4-digit display should be showing the current ambient temperature.
Congratulations! You built a simple proximity detector. But this is just the start of what you can build. Learn how you can use an Argon and the Grove Starter Kit to build a Wi-Fi thermometer that displays the current temperature on a display and in the cloud.