This document discusses measuring carbon dioxide (CO2) levels indoors. It provides information on why and how to measure CO2, including details on hardware and software implementations and results. Standards for indoor air quality based on CO2 parts per million (ppm) are referenced. Costs of various CO2 sensors are listed. Code examples are provided for reading sensor data from a serial port and writing to output streams. Next steps discussed include adding geo-location and improving the monitoring website and software.

1. CO2 Sense

2. • Why to measure
• How to measure
• Hardware imp.
• Software imp.
• Results
• Conclusion
• Plans

3. 10 000 ppm == 1%
ppm: parts per million

4. EN 13779:2007 standard
• IDA1 ( High indoor air quality ) 450 - 850
• IDA2 ( Medium indoor air quality ) 850 - 1050
• IDA3 ( Moderate indoor air quality ) 1050 - 1450
• IDA4 ( Low indoor air quality ) 1450+

5. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3548274/
National Institute of Environmental Health Science
Impact of CO2 on human decision-making performance

6. 450 ppm 1200 ppm >1200 ppm

7. Разумная сила метр большой жк монитор измерить
низкое потребление тока активность выбросы CO2
US $15

9. US $70
US $180

10. US $30+

13. MH-Z19

14. US $2

15. US $2.4
< US $1

16. < US $1

18. var port = new SerialPort( ”COM4” );
…
port.Write(
new[] { 0xff, 0x01, 0x86, 0x00, 0x00, 0x00, 0x00, 0x00, 0x79 },
0, 9);
var inBuffer = new byte[ 9 ];
port.Read( inBuffer, 0, inBuffer.Length );
GetCheckSum( inBuffer );
…
return inBuffer[ 2 ] * 256 + inBuffer[ 3 ];

19. [Import]
public ISensor Sensor;
[ImportMany]
public IEnumerable<IPPMStream> Streams;
while (true)
{
var ppm = Sensor.GetPPM();
foreach (var stream in Streams)
{
WriteToPPMStream(stream, ppm);
}
Thread.Sleep(10000);
}

26. Early bird

27. Early adopter

28. newcomer: “Hey, Let’s vent!”

29. Field force

30. Standup time!

31. We’re back

32. It’s lunch time!

33. Back to work!

34. 5 o'clock tee

35. that's all folks

36. Conclusions
From the data at hand, you really can't draw that conclusion.

41. What’s next?
• Geo location
• Website improvement
• Autonomic monitor

42. > netsh wlan show networks mode=bssid
Interface name : Wi-Fi
There are 3 networks currently visible.
SSID 1 : znet
Network type : Infrastructure
Authentication : WPA2-Personal
Encryption : CCMP
BSSID 1 : 00:19:cb:0a:45:b4
Signal : 96%
Radio type : 802.11b
Channel : 11
Basic rates (Mbps) : 1 2 5.5 11
SSID 2 : Kiril
Network type : Infrastructure
Authentication : WPA2-Personal
Encryption : CCMP
BSSID 1 : 2c:95:7f:56:20:bb
Signal : 30%
Radio type : 802.11n
Channel : 2
Basic rates (Mbps) : 1 2 5.5 11
Other rates (Mbps) : 6 9 12 18 24 36 48 54
SSID 3 : nik89
Network type : Infrastructure

43. https://managedwifi.codeplex.com/

44. https://en.wikipedia.org/wiki/Wi-Fi_positioning_system

54. ARDUINO

58. Links
• https://en.wikipedia.org/wiki/Indoor_air_quality#Carbon_dioxide
• http://victorborisov.livejournal.com/266117.html?thread=20439429
• http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3548274/
• http://www.beloveshkin.com/2015/04/kogda-dushno-dushnoe-
pomeshhenie-i-giperkapniya.html

59. Thanks