Data Collection And Preprocessing

First, I used an arduino script to read the values from the twelve channels of the MPR121.

After the Arduino script, I used (what was initially going to be) a simple bash command to read from the serial port and log the results.

npx @serialport/terminal -p /dev/tty.usbmodem1101 -b 19200 | perl -MTime::HiRes -ne '$|=1; printf "%.3f %s", Time::HiRes::time, $_' | tee -a output3.txt

As you can see, by the end it got a bit more complex...
Here's a breakdown:

First, the serialport node package¹ reads from the microcontroller.