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  <Article>
    <Journal>
      <PublisherName>ijesm</PublisherName>
      <JournalTitle>International Journal of Engineering, Science and</JournalTitle>
      <PISSN>I</PISSN>
      <EISSN>S</EISSN>
      <Volume-Issue>volume 14,issue 5,</Volume-Issue>
      <PartNumber/>
      <IssueTopic>Multidisciplinary</IssueTopic>
      <IssueLanguage>English</IssueLanguage>
      <Season>May 2025</Season>
      <SpecialIssue>N</SpecialIssue>
      <SupplementaryIssue>N</SupplementaryIssue>
      <IssueOA>Y</IssueOA>
      <PubDate>
        <Year>2025</Year>
        <Month>05</Month>
        <Day>5</Day>
      </PubDate>
      <ArticleType>Engineering, Science and Mathematics</ArticleType>
      <ArticleTitle>Advanced IoT-Based System for Air Quality Monitoring and Control in Meteorological station</ArticleTitle>
      <SubTitle/>
      <ArticleLanguage>English</ArticleLanguage>
      <ArticleOA>Y</ArticleOA>
      <FirstPage>37</FirstPage>
      <LastPage>47</LastPage>
      <AuthorList>
        <Author>
          <FirstName>Sarthak</FirstName>
          <LastName>Gupta</LastName>
          <AuthorLanguage>English</AuthorLanguage>
          <Affiliation/>
          <CorrespondingAuthor>N</CorrespondingAuthor>
          <ORCID/>
          <FirstName>Sarthak Singh</FirstName>
          <LastName/>
          <AuthorLanguage>English</AuthorLanguage>
          <Affiliation/>
          <CorrespondingAuthor>Y</CorrespondingAuthor>
          <ORCID/>
          <FirstName>Vishwanath Negi</FirstName>
          <LastName/>
          <AuthorLanguage>English</AuthorLanguage>
          <Affiliation/>
          <CorrespondingAuthor>Y</CorrespondingAuthor>
          <ORCID/>
          <FirstName>Dr. Sarika Kalra</FirstName>
          <LastName/>
          <AuthorLanguage>English</AuthorLanguage>
          <Affiliation/>
          <CorrespondingAuthor>Y</CorrespondingAuthor>
          <ORCID/>
          <FirstName>Dr. Lokesh</FirstName>
          <LastName>Varshney</LastName>
          <AuthorLanguage>English</AuthorLanguage>
          <Affiliation/>
          <CorrespondingAuthor>Y</CorrespondingAuthor>
          <ORCID/>
        </Author>
      </AuthorList>
      <DOI/>
      <Abstract>This paper presents an advanced IoT-based system for air quality monitoring and control tailored for deployment in meteorological stations. The system integrates a NodeMCU (ESP8266) microcontroller with environmental sensors, including the MQ135 gas sensor and DHT11 temperature and humidity sensor, to provide real-time data on atmospheric conditions. The MQ135 detects harmful gases such as carbon dioxide, ammonia, and benzene, while the DHT11 monitors ambient temperature and humidity. Data collected from these sensors is processed by the NodeMCU and transmitted over Wi-Fi to cloud platforms or meteorological databases for remote monitoring and analysis. When pollutant levels exceed predefined thresholds, the NodeMCU activates a suction pump via a relay module to improve air quality by expelling contaminated air</Abstract>
      <AbstractLanguage>English</AbstractLanguage>
      <Keywords>Air Quality Monitoring, IoT, Pollution Control, Sensor, Smart City</Keywords>
      <URLs>
        <Abstract>https://ijesm.co.in/ubijournal-v1copy/journals/abstract.php?article_id=15695&amp;title=Advanced IoT-Based System for Air Quality Monitoring and Control in Meteorological station</Abstract>
      </URLs>
      <References>
        <ReferencesarticleTitle>References</ReferencesarticleTitle>
        <ReferencesfirstPage>16</ReferencesfirstPage>
        <ReferenceslastPage>19</ReferenceslastPage>
        <References/>
      </References>
    </Journal>
  </Article>
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