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ICStation team introduce you how to DIY this temperature & humidity & smoke alarm system based on ICStation Mega 2560 compatible with Arduino.The working voltage of this system is DC5V.It can measure the current temperature, humidity and smoke. It can display real-time data by the 1602 LCD and can realize the sound and light alarm when in the dangerous temperature and humidity. It is a simply and easily to operate monitoring alarm system about temperature humidity and smoke.

Functions

1.When connect to the power supply, after the initialization of hardware, the1602 LCDwill display the current temperature,humidity and smoke volume

2.When we press the NO.1 key, the1602 LCD will turn the page and enter the dangerous temperature setting page.At this time, press NO.2 key once, the dangerous temperature will add one. If the actual temperature is higher than the setting value, the gree LED will light, at the same time the buzzer will alarm. When the actual temperature is lower than the dangerous temperature, the LED will go out and the buzzer will stop alarm.

3.When the 1602LCD display stays on the second page , we press the NO.1 key, you will see the 1602LCD will turn page to the third page and enter the dangerous humidity setting page.At this time, press the NO.3 key, the dangerous humidity will add one.If the actual humidity is higher than the setting value, the red LED will light,at the same time the buzzer alarms. When the actual humidity is lower than the dangerous humidity, the LED will go out and buzzer stop alarming.

Step 2: Schematic Diagram

Step 3: Hardware Wiring Program

Step 4: Introduce in power supply wire and GND wire

From ICStation Mega development board, introduce the 5V power supply and GND to the bread board. The red one as power supply wire and black one as the GND wire.

Step 5: Put in MQ-2 Gas Sensor Module

Connect MQ-2 Gas Sensor Module to the ICStation Mega development board,power supply and GND.

Step 6: Put in 1602 LCD

Plug in the LCD 1602 and potentiometer to the bread board and connect it to the power supply and GND

Step 7: Put in DHT11 temperature and temperature sensor

Plug in the DHT11 humidity and temperature sensor module to the bread board and connect to the ICStation Mega development board, power supply and GND

Step 8: Put in active buzzer module

Plug in the active buzzer module to the bread board and connect it to the ICStation Mega development board and power supply and GND

Step 9: Put in switches and resistor

Plug in the switch, resistor to the bread board and connect it to the ICStation Mega development board and GND

Step 10: Put in LED light emitting diode

Plug in the LED light emitting diode to the bread board and connect it to the ICStation Mega development board ,power supply and GND

Step 11: Provide Code and experimental effect

Code for your reference:

http://www.icstation.com/newsletter/eMarketing/alarm system code.txt

The experimental effect:

First, connect to the power supply,the LCD will display the first page of current temperature ,humidity and smoke volume.When we press the NO.1 key, the LCD will turn the page and enter the dangerous temperature setting page.At this time, press NO.2 key once, the dangerous temperature will add one.When we at the dangerous temperature setting page, we press the NO.1 key again, you will see the LCD will turn to the first page,at this time use your hand to touch DHT11 humidity and temperature sensor module,you can observe that the temperature and humidity increase gradually( Because the humidity and temperature of hand is higher than the air. When the temperature is higher than the temperature we set, the green LED will light and the buzzer will alarm. When the humidity is larger than the dangerous humidity we set, the red LED will light and the buzzer will alarm.

Step 12: Video to show the effect

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<p>Where can i find driver to recognize the arduino to enter the code?</p><p>I have a red light blinking on the ICStation with a &quot;L&quot; next to it, any idea on what i have done wrong? checked all my wiring multiple times also the alarm keeps beeping due to this red light it does this even when I have it hooked to the laptop?</p><p>Hoping this will make the LCD work, it is not lighting up, the pots circut has three prongs that are not that clear on how to hook it up could you detail that please</p><p>thank you for this,</p>
<p>Where is the Arduino code loacted at?</p>
<p>hi guys i recently buy this kit i connected every thing.... with in few sec the circuit is turning off when i connected to the pc any idea about this </p>
<p>the lcd is lighting up but its not displaying anything. help</p>
<p>check all yr connections. turn the variable resistor to get the right contrats</p>
<p>the lcd is lighting up but its not displaying anything. help</p>
<p>I like it but can i make it only smoke detector only? How? Please I need it.</p>
<p>ok so what if i wanted a controller that measures light,temp,humitiy and be able to control the environment i could care less for smoke detection... all new to this and whaling to expand my mind </p>

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Bio: www.ICStation.com is one-stop store of electronic, which specializes in all kinds of IC products, such IC accessories, Module, Robots, Development Board, Transistor, Capacitor ... More »
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