#Smart Home IoT Test Bench

##Introduction Smart Home IoT Test Bench is a project light version of MQTT. It is not a kind of MQTT, but made to transfer data easy and visualization like IoT devices.

• Project name : Capstone Design - Micro Processor
• Development period : 2016Y 03M 02D ~ 2016Y 06M 10D
• Development Part : Jongwoo Jun → LCD, Boiler in AVR / Android App | Taehee Jang → Door lock, Gas valve, sound in AVR / Raspberry Pi

##Features Video

###AVR ATmega8535 Video

• Switch X0 → Door lock mode(You can type password.) Video
• Door lock password correction check(Initial password is '4567') : If you type password correct + press 'a' button, Door unlock on screen with sound. Video If password wrong, clear typing screen and you can type again after sound. Video
• Door lock password modify : Type password 4 digits you want to change, and press 'e' button. Video
• Switch X2 → Boiler mode Video
• Boiler temperature control : Youcan control boiler temperature from 18 ~ 33 celcius by rotary switch. Video
• Switch X1, X3 → Gas valve mode : X1 loosen gas valve, X3 fasten gas valve. You can watch step motor rotate 180 degree.

###Raspberry Pi2 or 3 Video

• All-in-one installation script(install.sh)
• Auto start on startup
• Watch data from AVR and save data to RPi mariaDB and cloud instance mariaDB
• Process request from Android client

###Android(Since 4.1 Jelly Bean) Video

• Lock / Unlock door lock
• Fasten / Loosen gas valve
• Boiler on/off
• Control boiler temperature
• Watch home status

##Installation 1. Folk this project to your repository.

2. AVR ATmega8535 : Insert CD_ATmega8535.hex file (Location : CD_ATmega8535/Debug/Exe/CD_ATmega8535.hex) to your AVR device.

3. Raspberry Pi 2 or 3 :

3-1. Change #define MARIA_CLOUD "Your domain here" to your cloud domain in avr_daemon.c 18 line and commit.

3-2. Change WiFi SSID and Password as your wish in install.sh 97 ~ 98 line and commit.

3-3. Change git repository address to yours in install.sh 61 line and commit.

3-4. Boot raspbian OS and do "sudo raspi-config". Execute "1. Expand file system" and "4. International Option" → Select time zone, Change Localization. Reboot.

3-5. Clone this project in your repository or Copy install.sh by FTP client. And connect USB to RS232-C cable. Execute "sudo sh install.sh" Video

4. Android :

4-1. Change Raspberry Pi domain or local IP in MainActivity.java 231line .

4-2. Build android projects in CD_Android folder and install apk file in your phone.

##Details ###Hardware platform and devices

• AVR → MIDAS Engineering MDA-Multi MICOM (ATmega8535, http://www.midaseng.com/)
• Raspberry Pi 2 (Compatible to RPi3)
• Android (Since 4.1 Jelly Bean is available)
• Wireless router(Tested in ipTime A2004R)
• USB to RS-232C cable

###Development environment and tools

• Compiler : AVR → IAR Embedded Workbench Atmel AVR C / Raspberry Pi → arm-gcc C Compiler, PHP 5.6.11
• Operating system : Raspberry Pi → Raspbian Jessie 03-18-2016 / Android → Android 4.1 Jellybean or later
• Development environment : AVR development → Windows XP or 7 32bit / Raspberry Pi → Ubuntu 15.10 64bit or later / Android → Android Studio 1.5 or later
• Applications : Apache2, mariaDB, PHPMyAdmin, etc.

###AVR ATmega8535 ####Brief of Smart Home IoT Test Bench structures

####Details of Smart Home IoT Test Bench structures

####AVR(ATmega8535 main.c) flowchart

####DDR pin map

####Data transfer protocol information(RPi ↔ AVR) ※ All command characters(input parameters) are unsigned char.

Command character	Command name	Available command functions
0 ~ f (0x30 ~ 0x39, 0x61 ~ 0x66)	Screen boiler temperature	rs232_get_command(‘0 ~ f’) / set_rs232_data(‘0 ~ f’)
g (0x67)	Loosen gas valve	rs232_get_command(‘g’) / stepmotor_spin(‘g’) / set_rs232_data(‘g’)
l (0x6c)	Lock door	rs232_get_command(‘l’) / door_lock_unlock('l') / avr_sound(‘l’) / set_rs232_data(‘l’)
p (0x70)	4x4 Keypad is pressed	avr_sound(‘p’) / set_rs232_data(‘p’)
u (0x75)	Unlock door	rs232_get_command(‘u’) / door_lock_unlock('u') / avr_sound(‘u’) / set_rs232_data(‘u’)
v (0x76)	Fasten gas valve	rs232_get_command(‘v’) / stepmotor_spin(‘v’) / set_rs232_data(‘v’)
w (0x77)	Process error	set_rs232_data(‘w’)

####ATmega8535 main.c function information (18 functions)

Function name	Parameters	Return datatype	Return value	Description
delay		int	0	Delay 65000 counts.
doorlock		void		Show password input screen on LCD.
door_lock_unlock	u, l	int	0	Show password match or stay out mode screen on LCD.
stepmotor_spin	v, g	int	0	Rotate step motor left(v) or right(g).
init_rs232		int	0	Initialize RS232 registers.
set_rs232_data	unsigned char	unsigned char	0	Send 1byte unsigned char data from AVR via RS-232C cable.
get_rs232_data		unsigned char	0
encryption
boiler
SCAN ~ SCAN4		void
init_devices		int	0
avr_sound	w, u, l, p	int	0
rs232_get_command	unsigned char	int	0
encryption	void
password_checker		int	0, 1

####ATmega8535 main.c interrupts information

Interrupt name	Description
TIMER1_COMPA_vect

###Raspberry Pi (2 or 3) ####Raspberry Pi 2 structures

####Raspberry Pi 2(avr_daemon.c) flowchart

####Raspberry Pi 2(control.php) flowchart

####control.php data protocol information

Command variables	Command character	Command name	Command function	_POST variables
$andClientId	KEY_VALUE	Match ID between android and RPi	strcmp($andClientId, $rpiClientId);	andClientId
$andModeGet	1, 2	Set command to RPi whether get database or set command to AVR	1 → andGetMaria(); / 2 → rpiAndCommCheck();	andModeSet
$andCommGet	0 ~ f, u, l, g, v, o	Request specific function of AVR	avrSetComm($andCommGet, $avrDevId);	andCommSet

####mariaDB rpi_avr table structure in and_rpi_avr database

	cid	client_id	rpi_id	avr_id	avr_data	rpi_time
Primary key	Yes
Data type	char	char	char	char	char	TIMESTAMP
Length	30	30	20	20	1
Basic value						CURRENT_TIMESTAMP
NULL	NOT NULL
Encoding	utf8