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air_quality_monitor_ii [2019/05/05 19:13] – [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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-==== Footer Notes ====+==== Footnotes ==== 
 + 
 +<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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