/challenges-projects/design-challenges/pi-iot/b/blog/posts/pi-control-hub-spoke3-key-less-door-entry-testing-the-servoAs part of this blog post we are going to setup a Key-less Door entry system using a Servo motor and a Raspberry Pi A+, basically we are going to use the servo motor to open and close the door lock bolt, when you are at the front door of your house aen-USTelligent Community 12