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air_quality_monitor_ii [2019/05/05 18:08] – [Custom Box for the WeatherDuino Air Quality Monitor II] werk_agair_quality_monitor_ii [2021/06/11 03:53] (current) – [Overview] werk_ag
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 ====== Air Quality Monitor II ====== ====== Air Quality Monitor II ======
 +
  
 ===== Overview ===== ===== Overview =====
  
-The WeatherDuino Air Quality Monitor II measure PM2.5 and PM10 dust particles which are important indicators of air pollution.\\ +**NOTE: There is a new version of this device, the [[:air_quality_monitor_iii|]]** 
-Based on the PM2.5 readings, and in accordance with EPA standards the Air Quality Index is computed by using [[https://en.wikipedia.org/wiki/NowCast_(air_quality_index)|Nowcast]] functions.\\ + 
-The Air Quality Monitor can also be used to monitor CO<sub>2</sub> levels in a room, greenhouse or outside.<sup>3)</sup>\\+The WeatherDuino Air Quality Monitor II measures PM2.5 and PM10 dust particles which are important indicators of air pollution.\\ 
 +Based on the PM2.5 and PM10.0 readings, the Air Quality Index is computed. User can chose USA (EPA), Europe (EAQI), UK (DAQI) or Australian (AQC) standards,\\ 
 +The Air Quality Monitor can also be used to monitor CO<sub>2</sub> levels in a room, greenhouse or outside.<sup>3)</sup>  \\
 \\ \\
-The AQM II was designed to be installed in places with WiFi Coverage. It also can work without WiFi connection, however several of their functionalities will be unavailable.\\ +The AQM II was designed to be installed in places with WiFi Coverage. It can also work without a WiFi connection but several functions will be unavailable. 
-If WiFi isn't available on the location where you intend to install it, you may consider the use of the previous version of the Air Quality Monitor, still available.\\+ 
 +{{https://www.meteocercal.info/forum/videos/AQM_II.mp4|AQM_II.mp4}} 
  
-{{https://www.meteocercal.info/forum/videos/AQM_II.mp4}}\\ 
 ===== Key features ===== ===== Key features =====
  
-- Can be used by any person (doesn't require having an WeatherDuino Weather Station) for monitoring the Air Quality in any place of your home, indoor or outdoor.\\+- Can be used as a stand-alone device (doesn't require a WeatherDuino Weather Station) for monitoring the Air Quality in any place of your home, indoor or outdoor.\\
 - Can transmit Air Quality and T/H data to WeatherDuino receivers (when equipped with the RF transmitter).\\ - Can transmit Air Quality and T/H data to WeatherDuino receivers (when equipped with the RF transmitter).\\
-- OLED display (Optional item. You may not install the OLED display, per example in a unit which is operating outdoor to send data to an WeatherDuino receiver).\\ +- OLED display (Optional item. It is not necessary to install the OLED display, for example in a unit which is operating outdoors and sending data to a WeatherDuino receiver).\\ 
-- Can upload Air Quality data to online services like Thinkspeak, or to your own server (ex: to store data on a database).\\ +- Can upload Air Quality data to online services like Thinkspeak, or to your own server (eg. to store data in a database).\\ 
-- Several units can be used to form Air Quality Network. When a unit receives an HTTP GET it sends back the Air Quality data in JSON format.\\+- Several units can be used to form an Air Quality Network. When a unit receives an HTTP GET it sends back the Air Quality data in JSON format.\\
 - Powered via micro USB connector or connector on the PCB.\\ - Powered via micro USB connector or connector on the PCB.\\
-- Software can be upgraded by Over the Air (OTA). Requires WiFi connection.\\+- Software can be upgraded by Over the Air (OTA) (requires WiFi connection).\\
 \\ \\
-Picture below shows what you get on an WeatherDuino receiver, when the Air Quality Monitor II is setup to transmit data over radio frequency.\\+The picture below shows what you get on a WeatherDuino receiver when the Air Quality Monitor II is setup to transmit data over radio frequency.\\
 \\ \\
-{{:wiki:screenshot_wd_02.png?nolink&400|}} +{{:wiki:screenshot_wd_02.png?nolink&400}}
-=====  What is needed and is not included:  =====+
  
-- Power supply: 5V - 500mA. Average consumption is bellow 100mA, but when the sensors are being read, power requirement increases.\\+ 
 +===== What is needed and is not included: ===== 
 + 
 +- Power supply: 5V - 500mA. Average consumption is below 100mA, but when the sensors are being read, power requirement increases.\\
 - Temperature / Humidity sensor (HTU21D or SHT31)\\ - Temperature / Humidity sensor (HTU21D or SHT31)\\
-- [[http://www.winsen-sensor.com/d/files/infrared-gas-sensor/mh-z19b-co2-ver1_0.pdf|MH-Z19B]] CO2 sensor (can be assembled directly on the PCB with or without a socket, user choice).\\ +- [[http://www.winsen-sensor.com/d/files/infrared-gas-sensor/mh-z19b-co2-ver1_0.pdf|MH-Z19B]] CO<sub>2</sub> sensor (can be assembled directly on the PCB with or without a socket, user choice).\\ 
-- One dust particle sensor. Currently two models of dust particle sensors are supported:\\+- One dust particle sensor. Currently two models of dust particle sensors are supported: 
   * [[http://aqicn.org/sensor/pms5003-7003/|PMS7003]], from the well known brand [[http://www.plantower.com/en/content/?110.html|Plantower]].<sup>1)</sup>   * [[http://aqicn.org/sensor/pms5003-7003/|PMS7003]], from the well known brand [[http://www.plantower.com/en/content/?110.html|Plantower]].<sup>1)</sup>
   * [[http://aqicn.org/sensor/sds011|Nova SDS011]] made by [[http://www.inovafitness.com/en/a/chanpinzhongxin/95.html|Inovafitness]].   * [[http://aqicn.org/sensor/sds011|Nova SDS011]] made by [[http://www.inovafitness.com/en/a/chanpinzhongxin/95.html|Inovafitness]].
 +
 +Several scientific reports are listed at the bottom of this web page giving more information on these sensors and evaluating their performance.
  
  
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 ===== Technical Data ===== ===== Technical Data =====
  
-Power Requirements: 5VDC 500mA +Power Requirements: 5VDC 500mA Microcontroller: 32-bit Tensilica L106 microcontroller\\ 
-Microcontroller: 32-bit Tensilica L106 microcontroller \\ +Dust Sensor: PMS7003 or Nova SDS011\\ 
-Dust Sensor: PMS7003 or Nova SDS011 \\ +CO<sub>2</sub> Sensor: MH-Z19 (optional)\\ 
-CO2 Sensor: MH-Z19 (optional) \\ +RF Frequency: 433Mhz or 315Mhz <sup>4)</sup> 
-RF Frequency: 433Mhz or 315Mhz <sup>4)</sup>\\+
  
 ===== Custom Box for the WeatherDuino Air Quality Monitor II ===== ===== Custom Box for the WeatherDuino Air Quality Monitor II =====
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 Anyone with access to a 3D printer can print it, or alternatively order it through any of the several 3D print services available online\\ Anyone with access to a 3D printer can print it, or alternatively order it through any of the several 3D print services available online\\
 There are two versions of this box. One is for the units fitted with the OLED display (called indoor version) and the other is for units without the OLED display (called outdoor version).\\ There are two versions of this box. One is for the units fitted with the OLED display (called indoor version) and the other is for units without the OLED display (called outdoor version).\\
-The required files for the outdoor version are freely available here:\\ +The files required for 3D printing are freely available here:\\ 
-Indoor Version: https://www.thingiverse.com/thing:3608306\\+Indoor Version: [[https://www.thingiverse.com/thing:3608306|https://www.thingiverse.com/thing:3608306]]\\
 Outdoor Version: [[https://www.thingiverse.com/thing:3608146|https://www.thingiverse.com/thing:3608146]] Outdoor Version: [[https://www.thingiverse.com/thing:3608146|https://www.thingiverse.com/thing:3608146]]
  
 +If you don't have a 3D printer, you can order your case directly from online 3D printing services like [[https://www.3dhubs.com|3Dhubs]].
 +
 +
 +==== Footnotes ====
  
-==== Footer Notes ====+<sup>1)</sup>  - The very expensive PurpleAir Air Quality Monitor uses a Plantower dust sensor (model PMS5003, which is older than the PMS7003 used on WeatherDuino AQM).\\ 
 +<sup>2)</sup>  - See [[:weatherduino_receivers#weatherduino_receivers_-_comparison_chart|systems compatibility here]].\\ 
 +<sup>3)</sup>  - Accurate measurement of CO<sub>2</sub> concentration in the open air is a very complicated task, not achievable with simple equipment. According to its published specifications the error margin of a MH-Z19 sensor is 50ppm\\ 
 +<sup>4)</sup>  - Must match the frequency used by other Transmitter units. 
 +==== A few examples of the use of the PMS7003 dust sensor from the scientific literature ====
  
-<sup>1)</sup>   - The very expensive PurpleAir Air Quality Monitor, uses an Plantower dust sensor (the model PMS5003, which is older than the PMS7003 used on WeatherDuino AQM). \\ <sup>2)</sup>   - See [[:weatherduino_receivers#weatherduino_receivers_-_comparison_chart|systems compatibility here]]. \\ +Badura, M., Batog, P., Drzeniecka-Osiadacz, A. and Modzel, P (2018) Evaluation of Low-Cost Sensors for Ambient PM<sub>2.5</sub> Monitoring. Journal of Sensors, Article ID 5096540, 16 pages. [[https://doi.org/10.1155/2018/5096540|https://doi.org/10.1155/2018/5096540]]
-<sup>3)</sup>   - Precision measure of CO<sub>2</sub>  concentration in open air, is a very complicated task, not achievable with simple equipment. According to specifications the error margin of an MH-Z19 sensor is  50ppm \\ <sup>4)</sup>   - Must match the frequency used by other Transmitter units.+
  
 +Johnston, S.J. and nine others (2019) City Scale Particulate Matter Monitoring Using LoRaWAN Based Air Quality IoT Devices. Sensors 2019, 19, 209; doi:10.3390/s19010209. [[https://www.mdpi.com/1424-8220/19/1/209|https://www.mdpi.com/1424-8220/19/1/209]]
  
  

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