Scott Mendenhall
Published © MIT

Sentinel Security

Sentinel Security is a smart home monitoring system that uses an Amazon Alexa skill and Arduinos with PIR motion sensors to protect a home.

IntermediateFull instructions provided5 hours4,332
Sentinel Security

Things used in this project

Hardware components

Echo Dot
Amazon Alexa Echo Dot
×1
Arduino Nano R3
Arduino Nano R3
×1
PIR Motion Sensor (generic)
PIR Motion Sensor (generic)
×1
SparkFun Transceiver Breakout - nRF24L01+
SparkFun Transceiver Breakout - nRF24L01+
×2
Raspberry Pi 3 Model B
Raspberry Pi 3 Model B
×1
Jumper wires (generic)
Jumper wires (generic)
×1
Hookup Wire
×1

Software apps and online services

Alexa Skills Kit
Amazon Alexa Alexa Skills Kit
Used to make Sentinel skill.
AWS Lambda
Amazon Web Services AWS Lambda
Holds the Alexa skill code.
Firebase
Google Firebase
Acts as a free database backend.

Hand tools and fabrication machines

3D Printer (generic)
3D Printer (generic)
Used to print the sensor cases.
Soldering iron (generic)
Soldering iron (generic)
Used to attach sensor wires to the electronics.

Story

Read more

Custom parts and enclosures

SensorBase

This part holds the electronics for each sensor

SensorBack

This is the back cover for each sensor

Schematics

Sensor Wiring Diagram

The wiring connections for each sensor should follow this diagram
Sensorwiringdiagram no4phasa0o

Base Station Wiring Diagram

The wiring connections for the base station should follow this diagram
Basewiringdiagram j1w412ejcr

Code

Github Repository

This contains all of the necessary code to complete the project.

Credits

Scott Mendenhall

Scott Mendenhall

3 projects • 6 followers
Mechanical Engineering Student at UNC Charlotte

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