Project Name: Papillon

Project Members: Omid Ettehadi


Process Journal:

The XBee Chat Exercise was a fascinating opportunity to explore the XBee devices and to test out the capabilities of the XBee and the CoolTerm Software. Wireless communication in its simplest form can lead to a much simpler connection between different devices in a project.

While doing the exercise, I could not stop thinking about how this system can replace the complicated, internet-based systems that I had used for my previous projects, and how much things would become more reliable with a much shorter lag time.

To make a metronome receiver device, I decided to start with a simple example first, to test the limits of the XBee and find out the range and the kind of packaging I could use in my project. I ran the “Physical Pixel” example and placed the device in different locations to see how different materials affect the range.

For my next step, I changed the Serial in the example to Serial1 and used another XBee with the CoolTerm software to send data to the device.

mvimg_20190113_132413For this project, I wanted to play with something that I hadn’t had the chance to play with before. I decided to create a simple piano by playing different frequencies for each note and allowing the metronome device to set the tempo for the music.

To create different frequencies, I used the “Melody” example, I turned on the speaker, waited for the period of the note and then turned the speaker off and waited for the period of the speaker again. I repeated the same procedure for 20 times so that the note is created. For the music, I chose the soundtrack of the movie Papillion and wrote down the notes for the song in an array.  Every time the device receives an H or an L, it will play a note from the array.

To add more to the project, I added a servo motor installed on a drum piece, so that after every 4 notes, the drum will make a sound as well, keeping the beat of the music.



Component List:


Final Schematic:





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