IOTLock

A prototype IOT Lock that locks and unlocks via fingerprint, user defined "secret knock", bluetooth, and websocket.

Overview

This is an IOT Door Lock for mbed. We allow for multiple ways to lock and unlock the door utilizing Wi-Fi, Bluetooth, IMU, and Fingerprint functionality. Additionally, our project allows for dynamically adding fingerprints for access, and custom knock sequences.

Each mBed LPC1768 has 3 UART serial communication channels, while this project requires a serial communication channel for each of the four necessary peripherals. In order to overcome this, we employ two mBed modules and have them communicate via DigitalOut/DigitalIn mBed APIs.

The first mBed (mBed 1) communicates with the wiFly module and the TTL GT-511C3 to hand the websocket and fingerprint scanner functionality. The code for this mBed is contained in the folder fp_web. The second mBed (mBed 2) communicates with the Bluefruit module and the IMU to handle the bluetooth and secret knock functionality. The code for this mBed is contained in the folder bt_knock.

This project was completed in conjunction with team members Bao Bui, Erik Lomas, and Trung Nguyen as part of a course project at Georgia Tech.

Features

• Lock/Unlock via fingerprint scanner
• Register new fingerprints
• Lock/Unlock via custom "secret knock"
• Register new secret knock pattern
• Lock/Unlock via bluetooth
• Lock/Unlock via websocket

Watch the demo on youtube:

Components

• TTL GT-511C3 Fingerprint Scanner
• LSM9DS1 IMU
• Adafruit Bluefruit Bluetooth Module
• WiFly RN-171-XV Wi-Fi Module
• mBed LPC1768 (x2)

Wiring

mBed 1

mbed 1	WiFly	TTL GT-511C3	SPDT switch	mbed 2
gnd	gnd
Vout(3.3V)	VDD_3V3
p9	UART_RX
p10	UART_TX
p26	GPIO6
p19	reset
Vout(3.3V)		VCC
gnd		gnd
p28		RX
p27		TX
p22			pole
Vout (3V)			throw1
gnd			throw2
p21				p8

mBed 2

mBed 2	Bluefruit	IMU	Servo	mBed 1
gnd	gnd
Vu (5V)	Vin
p14 (Serial RX)	TXO
p13 (Serial TX)	RXI
gnd	CTS
gnd		gnd
Vout (3.3V)		VDD
p9		SDA
p10		SCL
p21			control
p8				p21