Monitoring Temperature Room With Display LCD and Data Recording

MONITORING TEMPERATURE RUANGAN DENGAN DISPLAY LCD

DAN RECORDING

MOCH. REZKI SELAMET

MOKH IMAM NUGROHO

SITI HARYANI

YUDA WARDIANA

LATAR BELAKANG

Dalam suatu pengukuran temperature kita

biasanya menunggu guna memperoleh data tiap

menit. Tetapi kadang kala kita selalu meniggalkan

pengukuran karena ada kegiatan lain yang sama

penting. Karna itu alat ini dibuat untuk menyimpan data temperature supaya data pengukuran tersimpan walaupun

kita tinggalkan.

TUJUAN

Dapat mengetahui suhu ruangan yang terukur

Dapat menyimpan data temperature

Dapat mengetahui perubahan suhu ruangan

Dapat menganalisis data yang tersimpan guna

keperluaan akademik

DESKRIPSI ALAT

Alat ini mempunyai 4 buah sensor LM35 yang

ditempatkan pada tiap sudut ruangan ditampilkan

pada display LCD dan di record oleh arduino uno. Penyimpanan data dengan micro sd module shield

dan di simpan oleh memori micro sd menit permenit

temperaturenya. Data yang disimpan oleh micro sd

module berbentuk .txt(notepad).

Alat Dan Bahan

Arduino Uno

LM 35 LM35 TEMPERATURE SENSOR IS ONE TYPE OF SENSOR THAT

CONVERTS ELECTRICAL QUANTITIES TO THE TEMPERATURE

SCALE IN THE FORM OF VOLTAGE. LM35 HAS 3 PIECES PIN

LEGS, PIN TO INPUT POSITIVE VOLTAGE (+), PIN OUTPUT, INPUT

PIN NEGATIVE VOLTAGE / GND (-).

LM 35

HOW the LM 35 measure???

Can operate at a voltage of 4 volts to 30 volts. Each temperature of 1 degree Celsius will show a voltage of 10 mV.

equation:

Vout = 10 mV / 1ºC

That is, if the read voltage Vout = 500 mV, then the temperature = 500mv / 10mV = 50ºC.

35 ºC

Vout = 10 mV / 1ºC

That is, if the read voltage Vout = 500 mV, then the temperature =

500mv / 10mV = 50ºC.

EXAMPLE

Arduino use sensor LM 35

Read the output of LM35 goes into analog pin, Read data already in the form of ADC conversion

Converting ADC = Vout / Vref * 1023

So it's not in the form of voltage magnitude again If you want to know the LM35 output voltage using the formula above:

Read voltage = Conversion ADC voltage reference * / 1024

MICRO SD SHIELD

The module (MicroSD Card Adapter) is a Micro SD card

reader module, and the SPI interface via the file system

driver, microcontroller system to complete the Micro SD card

read and write files. Users can directly use the Arduino IDE comes

with an SD card to complete the library card initialization and

read-write

Features:

Support Micro SD Card, Micro SDHC card (high-speed card)

The level conversion circuit board that can interface level is 5V or 3.3V

Power supply is 4.5V ~ 5.5V, 3.3V voltage regulator circuit board

Communication interface is a standard SPI interface

4 M2 screw positioning holes for easy installation

Control Interface: A total of six pins (GND, VCC, MISO, MOSI, SCK, CS), GND to ground, VCC is the power supply, MISO, MOSI, SCK is the SPI bus, CS is the chip select signal pin;

3.3V regulator circuit: LDO regulator output 3.3V as level converter chip, Micro SD card supply

Level conversion circuit: Micro SD card into the direction of signals into 3.3V, MicroSD card toward the direction of the control interface MISO signal is also converted to 3.3V, general AVR microcontroller system can read the signal

Micro SD card connector: yes since the bomb deck for easy card insertion and removal

Positioning holes: 4 M2 screws positioning hole diameter of 2.2mm, the module is easy to install positioning, to achieve inter-module combination

Mirco SD Card Interface Module :(the last picture show)

-Control Interface : A total of six pins (GND, VCC, MISO, MOSI, SCK, CS), GND to ground , VCC is the power supply , MISO, MOSI, SCK is SPI bus , CS is the chip select signal pin

3.3V voltage regulator circuit : LDO regulator output is 3.3V level converter chip , Micro SD card supply

Level conversion circuit : Micro SD card into the direction of the signal is converted to 3.3V, MicroSD card interfaces to control the direction of the MISO signal is also converted into 3.3V, general AVR microcontroller system can read the signal ;

Micro SD card connector : a self- bomb deck , easy card insertion .

Positioning holes : 4 M2 screws positioning hole diameter is 2.2mm, the positioning of the module is easy to install , to achieve inter- module combination ;

LCD AND BACKPACKThis is another great LCD display compatible with

I2C bus and Gadgeteer modules. With limited pin

resources, your project will quicly run out of resources

using normal LCDs. With this I2C interface LCD

module, you only need 2 lines (I2C)to display the

information.If you already have I2C devices in your

project, this LCD module actually cost no more

resources at all. The adress can be set from 0x20-

0x27.Fantastic for Arduino or gadgeteer based

projects.

Specifications LCD

•Supply voltage: 5V

•I2C Address:0x20-0x27(0x20 default)

•Back lit (Blue with white char color)

•Interface:I2C/TWI x1,Gadgeteer interface x2

•Adjustable contrast

•Size:82x35x18 mm

Specifications Bacpack PCF8574

• Compatible With Most Microcontrollers

• Low Standby-Current Consumption10 mA Max

• Latched Outputs With High-Current Drive

• I2C to Parallel-Port Expander Capability for

Directly Driving LEDs

• Open-Drain Interrupt Output

• Latch-Up Performance Exceeds 100 mA Per

JESD 78, Class II

RTC DS1302

A Real Time Clock Module with battery backup using the

easy to use DS1302 chip. The DS1302 chip uses a simple serial

interface (see datasheet) and example code is available for

Arduino, Raspberry Pi and many others.

Features

Real-Time Clock Counts Seconds, Minutes, Hours, Date of the

Month, Month, Day of the Week, and Year with Leap-Year

Compensation Valid Up to 2100

Serial I/O for Minimum Pin Count

2.0V to 5.5V Full Operation

Uses Less than 300nA at 2.0V

Single-Byte or Multiple-Byte (Burst Mode) Data Transfer for Read or Write of Clock or RAM Data

Board Size: 44mm x 24mm

Desain Project

LANGKAH MERANGKAI

Siapkan alat dan bahan termasuk wadah misting

Wadah misting lubangi untuk keperluan shield

micro sd dan arduino

Buat jalur rangkaian pcb untuk pembagian

tegangan dan konektor pin arduino

Rangkai seperti gambar

Up load script data pada arduino.

SCRIPT ARDUINO#include <Wire.h>

#include <LiquidCrystal_I2C.h>

#include <SD.h>

#include <DS1302.h>

File myFile;

LiquidCrystal_I2C lcd(0x27, 16,2);

float tempc;

float tempc1;

float tempc2;

float tempc3;

int tempin = 0;

int tempin1 = 1;

int tempin2= 2;

int tempin3 = 3;

int a=1;

int b;

DS1302 rtc(2, 3, 5);

void setup()

{

lcd.begin();

Serial.begin(9600);

while (!Serial) {

; // wait for serial port to connect. Needed for Leonardo only

}

Serial.print("Initializing SD card...");

// On the Ethernet Shield, CS is pin 4. It's set as an output by default.

// Note that even if it's not used as the CS pin, the hardware SS pin

// (10 on most Arduino boards, 53 on the Mega) must be left as an output

// or the SD library functions will not work.

pinMode(10, OUTPUT);

if (!SD.begin(4)) {

Serial.println("initialization failed!");

return;

}

rtc.halt(false);

rtc.writeProtect(false);

}

void loop()

{

tempc= analogRead(tempin);

tempc= (5*tempc*100)/1024;

tempc1= analogRead(tempin1);

tempc1= (5*tempc1*100)/1024;


tempc2= (5*tempc2*100)/1024;


tempc3= (5*tempc3*100)/1024;

b=a++;

lcd.backlight();

lcd.setCursor(0,0);

lcd.print(b);

lcd.setCursor(3,0);

lcd.print(tempc,1);

lcd.setCursor(10,0);

lcd.print(tempc1,1);

lcd.setCursor(3,1);


lcd.setCursor(10,1);


Serial.println("initialization done.");

myFile = SD.open("T1A1.txt", FILE_WRITE);

if (myFile)

{

Serial.print("Writing to T1A1.txt...");

myFile.println(rtc.getDOWStr());

myFile.println(" ");

myFile.println(rtc.getDateStr());

myFile.println(" -- ");

myFile.println(rtc.getTimeStr());

myFile.println("T('C)= ");

myFile.println(tempc);

myFile.print("T1 ('C)= ");

myFile.println(tempc1);





myFile.println("---------------------------------------------------");

myFile.close();

Serial.println("done.");

}

else

{

Serial.println("error opening T1A1.txt");

}

myFile = SD.open("T1A1.txt");

if (myFile) {

Serial.println("T1A1.txt:");

while (myFile.available()) {

Serial.write(myFile.read());

}

myFile.close();

} else {

Serial.println("error opening T1A1.txt");

}

delay(5000);

}

LANGKAH PENGUJIAN

DAN DATA PENGUJIAN

Selama 2 jam pengukuran dengan waktu 1 menit

penyimpanan data yang tersimpan 21 kb

sedangkan memori 1.949.302kb.

1hari data=24jam/2jam=12x21kb=252kb/hari

1.949.302kb/252kb/hari=7.735hari

7.735/365=21 tahun

KESIMPULAN DAN SARAN

Data temperature lm35 yang terbaca oleharduino harus di ubah ke ADC supaya bisa terukursuhunya oleh arduino.

Data yang tersimpan oleh shield micro sd berupatxt(notepad)

Backpack yang terpasang pada lcd bergunauntuk memperkecil pin pada lcd

Saran

Untuk mempermudah sambungan pin dan untukmenempel dengan benar seharusnya dipasanterminal untuk memperkuat sambungan

Engineering

Monitoring Temperature Room With Display LCD and Data Recording