Example that use fft for show in a lcd display, divided by symmetric bands
Copyright (c) Ivan Moreno 2018
This example use the arduinoFFT, you can fond the library in https://github.com/kosme/arduinoFFT also use a LiquidCrystal, you can fond the library in https://github.com/arduino-libraries/LiquidCrystal
This program is free software: you can redistribute it and/or modify it under the terms of the GNU Gene ral Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.