*11 WEEK : INDOOR & OUTDOOR & PORTABLE / WIFI SHIELD

#Indoor & Outdoor & Portable

Today, i will reported about my progress on Week 9th. For this week, i had discuss w my sv about the workscope or the limitation of my project, i had confirm about the characteristics of my project, which is, my project can be used indoor and outdoor. The most important thing is, it is not exposed to wet surface. Next, my project is portable device. This project is mild and small, so it will be easy to user to bring itt everywhere. In addition this device is using battery, does not need external supply.

#Wifi-Shield

From the previous post, i had mention that i had confirm to use Arduino Uno and Arduino Ethernet Shield for as a processor for my Air Quality Monitoring System. But, after some research and discussion with my SV, we had agree to change Arduino Ethernet Shield to Arduino Wi-Fi Sheild as the interface to connect my device to internet. The most reason why i change this Arduino is because, Arduino Wi-Fi Shield will directly connect my device into the internet. Compare to Ethernet Shield, this device need to be connected to the internet manually, which is the user need to connect the device by using their own Wi-Fi or internet connection.

What is Arduino Wi-Fi Shield ?
Arduino Wi-Fi Shield is another board in Arduino family. This board make the connection to Wi-Fi network simpler, no need the configuration in addition to the SSID and the password. This is th illustration of Arduino Wi-Fi Shield.

Features

Operating voltage both 3.3V and 5V

Connection via: IEEE 802.11 b/g/n for up to 72 Mbps networks

Encryption types: WEP and WPA2 Personal

Support TLS 1.1 (SHA256)

Connection with Arduino or Genuino on SPI port

On board Crypto Authentication by ATMEL

From all the characteristics of Arduino Wi-Fi Shield, it is very suitable for low-cost air quality monitoring system. This is because this project is using Wi-Fi as the main medium transmission. Besides that, Wi-Fi Shield is very easy to use with the Uno because Wi-Fi Shield is comes with an ‘easy to use library’ that allows Arduino Uno to connect to the internet with few instructions.

*10 Week Temperature & Humidity Sensor

#Temperature and Humidity Sensor

For this week, my SV had bought me a Temperature and Humidity Sensor (AOSONG AM2320). This product is made from China. This component act as a input for my Air Quality Monitoring System. There is a datasheet of AOSONG AM2320:
 https://akizukidenshi.com/download/ds/aosong/AM2320.pdf

#Test and Error
For this week also i tried to test the Dust sensor that given by my SV. I tried this component directly from Arduino software on Laptop to circuit. But I failed.

*9 Proposal Approved

Lastly, on week 9, my project proposal had been approval after repair a minor mistake. So my proposal had been officially approved . heeee :D

For this week, i had made my choices to use Arduino Uno and Ethernet Shield. The main reason i choose this Arduino because of the cost. In my survey, the cost for Arduino Yun is higher than Arduino Uno and Arduino Ethernet Shield, this is because Yun did not have the pirate one. The price for the original Yun is very expensive. Compare to Arduino Uno, there is a pirate version which is cheaper than Yun. Uno + Ethernet Shield is RM1++.++, compare to Yun which cost RM3++.++.
For the other characteristic which is the total of pin, my SV had confirm this two Arduino can place all the sensor and the output require. So there is no problem if i choose Uno and Ethernet Shield.

Arduino Uno and Arduino Ethernet Shield

*7 Week Plan of Prototype

For this 7th week, i plan to talk about the prototype of my Air Quality Monitoring System. The characteristic of the prototype :

• Small
• Air holes
• Portable
• Long lasting
• Mild
• Interesting color

This is one of the example of suitable casing for my AQMS :

The "Frame" design case with an integrated heatsink

From fischer elektronik

*6th Week Component Confirmation

For 6th week, i had confirm with my SV about the component that i will used for made up my Air Quality Monitoring System.

#Optical Dust Sensor (Input)
#Temprature & Humidity Sensor (Input)
#Arduino (Process)
#Light Emitting Diode, LED (Output)
#LCD (Output)

For Arduino, i had to decide which one is better to process my system. Between Arduino Uno and Arduino Ethernet Shield OR Arduino Yun. The characteristics that i had to compare is the cost, the pin that use and others.

In this week, my SV shows the example of Arduino operation by using a Dust Sensor.
This is one example the Dust Sensor and Arduino usage : http://sensorapp.net/sharp-dust-sensor-and-arduino/

Beside that, for this week, i had submit my repaired proposal.

Thank You :D

*8 Air Mentor

Air mentor is one the device that monitor the indoor air quality. This device have same function with my Air Quality Monitoring System which is to monitor the air quality, but only inside the building.

AIR MENTOR

Air Mentor is an intelligent air quality monitoring device. With built-in industrial grade sensors, it can stably monitor air pollutants including Particulate Matters, Total Volatile Organic Compounds and CO, CO2, together with environment temperature and relative humidity.

There is two product of Air Mentor :

1. Air Mentor - Smart Air Quality Monitor

Air Mentor is smart Air Quality Monitor. It can detect concentrations of VOC, Particulate Matter, Temperature, and Relative Humidity.

2. Air Mentor PRO - 6 in 1 Smart Air Quality Monitor

Air Mentor in an intelligent Air Quality Monitor up to 6 in 1 indoor pollutant concentrations of CO2, VOC together woth CO,PM2.5 and PM10, Temperature, and Relative Humidity.

This is the video of Air Mentor :

https://youtu.be/xzukvm5n95I

#Check current air quality by APP

When connecting to the sensor, Air Mentor APP can show real time individual masurements and it gives advising for improving the air quality. Our purpose is to provide an easier tool to make your indoor quality simplify. We also provide iOS and Android to display tips and suggestions of detections results.

#Easy tracking with APP

Air Mentor sensor can record 3 days measurements, when Smartphone closes to the sensor and the APP will connect to it and download recording data automatically. User can check the air quality changes by hourly, daily, weekly and monthly, and can also mark notes into the chart for long term tracking and improvement. 

The Design

Overall structure fits snugly and yoga style. The combination of LED light shows th air quality on each level with different color and breathing frequency.

Air Mentor Appplications in School :

https://youtu.be/HJfN0c6I5d8

 For more detail about this product, please go to : https://www.air-mentor.com/products

*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