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amc2022:grouph:start [2022/09/10 21:23] – [7. Conclusion] gustavo001amc2022:grouph:start [2023/01/05 14:38] (current) – external edit 127.0.0.1
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 Determining the quality of the air we breath is directly related to knowing how many and what type of those particles are present in the air. Therefore, we have used the MQ2 sensor which not only detects certain types of particle matter but also its concentration.   Determining the quality of the air we breath is directly related to knowing how many and what type of those particles are present in the air. Therefore, we have used the MQ2 sensor which not only detects certain types of particle matter but also its concentration.  
  
 +Listed below are limit threshold amounts for different particulate matter in the air at which the health risks are moderate. There are many sources and depending on where you obtain your source the number may vary. 
  
 ^Particle ^ Concentration on ppm ^ ^Particle ^ Concentration on ppm ^
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 |CH4((https://www1.agric.gov.ab.ca)).                                                     | 1000| |CH4((https://www1.agric.gov.ab.ca)).                                                     | 1000|
 |Propane((https://nj.gov/health/eoh/rtkweb/documents/fs/1594.pdf)).                       | 1000| |Propane((https://nj.gov/health/eoh/rtkweb/documents/fs/1594.pdf)).                       | 1000|
 +
 +
 +
 +<wrap em>
 +For an explanation of how the sensor works and how we implemented it in our Air quality device please follow this link [[amc2022:grouph:mq2|MQ 2]]
 +
 +</wrap>
 +
 +
 +
 ==== 3.3 MQTT Database and WiFi Connection ==== ==== 3.3 MQTT Database and WiFi Connection ====
  
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 #define         GAS_SMOKE                     (5) #define         GAS_SMOKE                     (5)
 #define         GAS_PROPANE                   (6) #define         GAS_PROPANE                   (6)
-#define         accuracy                      (0)   //for linearcurves +#define         accuracy                      (0)   //for linear-curves 
-#define         accuracy                      (1)   //for nonlinearcurves, un comment this line and comment the above line if                                                                       \\                                                    calculations+#define         accuracy                      (1)   //for nonlinear-curves, un comment this line and comment the above line if                                                                       \\                                                    calculations
                                                     //are to be done using non linear curve equations                                                     //are to be done using non linear curve equations
  
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 /*****************CALLBACK FUNCTION*************************************************************************************/ /*****************CALLBACK FUNCTION*************************************************************************************/
  
-/****** The mqtt client calls a callback method on seperate thread to main application thread.**************************/+/****** The mqtt client calls a callback method on separate thread to main application thread.**************************/
  
 void callback(char *topic, byte *payload, unsigned int length) { void callback(char *topic, byte *payload, unsigned int length) {
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  Input:   mq_pin - analog channel  Input:   mq_pin - analog channel
  Output:  Rs of the sensor  Output:  Rs of the sensor
- Remarks: This function use MQResistanceCalculation to caculate the sensor resistenc (Rs). + Remarks: This function use MQResistanceCalculation to calculate the sensor resistance (Rs). 
-         The Rs changes as the sensor is in the different consentration of the target+         The Rs changes as the sensor is in the different concentration of the target
          gas. The sample times and the time interval between samples could be configured          gas. The sample times and the time interval between samples could be configured
          by changing the definition of the macros.          by changing the definition of the macros.
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-Using a low cost Arduino Kit and integrating the ESP32 micro controller, we were able to accomplish three tasks. The first was to measure different Air Quality parameters such as temperature, humidity and particulate matter. By using the Mq2 sensor, we were able to measure the ppm of the following gasses: H2, CH4, CO, Alcohol, Propane, LPG and smoke. However depending on the source or literature it is possible to find multiple threshold limits of inhalation that produce adverse health effects on humans. Therefore we could further expand the project to have both a more sensitive sensor and a predefined threshold limit that will warn the user of the device of any potential health hazards. As of right now the user is only able to monitor the amount of particulate matter within the scope of the sensor. +Using a low cost Arduino Kit and integrating the ESP32 micro controller, we were able to accomplish three tasks. The first was to measure different Air Quality parameters such as temperature, humidity and particulate matter. By using the MQ2 sensor, we were able to measure the ppm of the following gasses: H2, CH4, CO, Alcohol, Propane, LPG and smoke. However depending on the source or literature it is possible to find multiple threshold limits of inhalation that produce adverse health effects on humans. Therefore we could further expand the project to have both a more sensitive sensor and a predefined threshold limit that will warn the user of the device of any potential health hazards. As of right now the user is only able to monitor the amount of particulate matter within the scope of the sensor. 
 Secondly we were able to transmit data using a publish-subscribe broker. By using MQTT we were able to create topics that contained the data received by the Arduino sensors, later with the help of the Node Red software, we created a flow chart in which the data input from the topic and utilizing the JSON format, was sent to Grafana where the data was ultimately transformed visually for easy interpretation. We decided to keep one topic containing all the data, because the idea is to have multiple Air Quality devices running simultaneously but each having its own independent topic. That would help us identify easier any issues with any of the devices.  Secondly we were able to transmit data using a publish-subscribe broker. By using MQTT we were able to create topics that contained the data received by the Arduino sensors, later with the help of the Node Red software, we created a flow chart in which the data input from the topic and utilizing the JSON format, was sent to Grafana where the data was ultimately transformed visually for easy interpretation. We decided to keep one topic containing all the data, because the idea is to have multiple Air Quality devices running simultaneously but each having its own independent topic. That would help us identify easier any issues with any of the devices. 
 Lastly we successfully operated the device using a 9V battery and integrated the following components and features for improved performance:  Lastly we successfully operated the device using a 9V battery and integrated the following components and features for improved performance: 
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 We thus demonstrate that devices with the purpose of monitoring air quality can be built easily and cheaply. In addition, we explained the steps taken by us in this project and expanded on how the components work. We hope that his work can help inspire new students and hobbyists in their pursue of producing devices that have the following characteristics: We thus demonstrate that devices with the purpose of monitoring air quality can be built easily and cheaply. In addition, we explained the steps taken by us in this project and expanded on how the components work. We hope that his work can help inspire new students and hobbyists in their pursue of producing devices that have the following characteristics:
-Collection of data// +  * Collection of data 
-Programming software// +  * Programming software 
-Transmission of data and usage of brokers// +  * Transmission of data and usage of brokers 
-Electronics// +  * Electronics 
-Reporting through wikis// +  * Reporting through wikis 
-FUN!+  * FUN! 
 + 
 =====8. Discussion===== =====8. Discussion=====
  
amc2022/grouph/start.1662837800.txt.gz · Last modified: 2023/01/05 14:38 (external edit)