The SDI12 library code is released under the GNU Lesser Public License (LGPL 2.1) -- See LICENSE-examples.md file for details. Example Arduino sketches are released under the BSD 3-Clause License -- ...

It has a built-in alarm to alert you if someone ... attempting to fiddle with your keypad, the Smart Lock U100 will flash an angry red if the wrong code is put in. Do it a set number of times ...

This is the library for the Adafruit Motor Shield V2 for Arduino. It supports DC motors & Stepper motors ... 2927 Adafruit invests time and resources providing this open source code, please support ...