*5 The Repaired Proposal

For the fifth week, i had check my proposal. There is a lot of things that i have to repaired to improve my proposal.

#Project Briefing

*Temperature sensor & Humidity Sensor
My SV asked to add this sensor at the input of my project. There is an example of Temperature & Humidity Sensor.

DHT22 TEMPERATURE-HUMIDITY SENSOR

The DHT22 is a basic, low-cost digital temperature and humidity sensor. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air, and spits out a digital signal on the data pin (no analog input pins needed). Its fairly simple to use, but requires careful timing to grab data. The only real downside of this sensor is you can only get new data from it once every two second, so when using out library, sensor readings can be up to 2 seconds old.

Simply connect the first pin on the left to 3-5V power, the second pin to your data input pin and the right most pin to ground. Although it uses a single-wire to send data it is not Dallas One Wire compatible! If you want multiple sensors, each one must have its own data pin! This sensor is more precise, more accurate, and works in a bigger range of temperatur/humidity, but its larger. Comes with a 4.7K-10K resistor, which you will want to use a pull up from the data pin to VCC.

Technical Details :

• Low cost
• 3 to 5V power and I/O
• 2.5mA max current use during conversion (while requesting data)
• Good for 0-100% humidity readings with 2-5% accuracy
• Good for -40 to 80C temperature readings ±0.5°C accuracy
• No more than 0.5Hz sampling rate (once every 2 sec)
• Body size 27mm x 59mm x 13.5mm (1.05" x 2.32" x 0.53")
• 4 pins, 0.1" spacing
• Weight 2.4g

The datasheet: DHT22 datasheet

The example code : Arduino library and example code

So, my block diagram has been change :

#Problem Statement

The Real-Time data

The data about the quality of air from the Meteorological Department might be late a few hours before the peolple receive the information. This is because the department has to take a time range within 24hours.

The Location
The information from th news might be at the big cities, but not at the actual area that the people require. So, the user can used this device to their specific area.

The Accessibility of Data
The user can get the information anytime and anywhere. As long as the user is connected to the internet. So there is no problem for user to know the current air at the their home while they are away.

The Flexibility
This device is portable, the user can use this device wherever they want, so they can make sure that the air at their current place is safe.


#Objectives

1. To study about the air quality monitoring system
2. To run the simulation of the system
3. To assemble the hardware prototype with all the sensor
4. To develop the functionality using Arduino
5. To testing and checking the operational of this system
6. To analyse the performance of this system

#Workscope

1. This air quality monitoring system can be used either inside or outside the building, as long as the device not exposed to the wet surface
2. The device must be connected to a Wifi network
3. Th user must have internet connection to display the data

#The Methodology

1. Project Planning
2. Study about the air (poor air)
3. Determine the hardware and software
4. Determine the connection and do simulation
5. Implementation of the hardware and software
6. Troubleshoot and Testing
7. Data analysis and Report

#Result Expectation

1. A working prototype of an air quality monitoring system
2. The device gives accurate and real-time information about the level of the air quality to user
3. The device gives information about the level of air quality to user anytime and everywhere

This all the things that i had repaired for my proposal for this PSM1. i hope there nothing that have to be repair anymore :D