JISR on Computing (Dec 2023)

Environmental Temperature and Humidity Monitoring at Agricultural Farms using Internet of Things & DHT22-Sensor

  • Seema Ansari,
  • Adeel Ansari,
  • Adeet Kumar,
  • Rahul Kumar,
  • Elisha Tadiwa Nyamasvisva

DOI
https://doi.org/10.31645/JISRC.23.21.2.5
Journal volume & issue
Vol. 21, no. 2

Abstract

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Many monitoring systems have been designed and tested by researchers for monitoring environment temperature and humidity for different industrial applications and smart homes using DHT22 or DHT11 with Arduino Uno and wireless communication module. DHT22 is found to have better specifications in terms of performance and accuracy for measuring both temperature and humidity compared to DHT11. Arduino UNO is a microcontroller commonly used in scientific research. There are other more powerful microcontrollers available in the market. We chose ESP32 as its CPU is more powerful and can run upto 240 MHz, whereas Arduino UNO can run upto 16 MHz. In terms of connectivity, there is no Wi-Fi or Bluetooth functionality built in Arduino board, whereas ESP-32 has Wi-Fi and Bluetooth functions built in, which makes it more suitable for IoT projects. This paper aims at using Long Range Wide Area Network (LoRaWAN) Technology to monitor environmental temperature and humidity at the agricultural farm remotely, using DHT22 in conjunction with TTGO T-Beam as it has an ESP32 development board and also includes a GPRS module. ESP32 can be connected to the internet using Wi-Fi. The sensor connected to the T-Beam sends data to the Cloud through the internet. In this experiment, we used the Firebase platform to save data in the database. This information can also be received on the serial monitor as well as on smartphones and Web/App by the concerned personnel. The T-Beam module is a reliable module for data communication and covers up to 15Kms range. The LoRaWAN is used as a gateway to connect devices wirelessly to the internet and manages communication between end nodes. The buzzer is set to turn on for temperature ≥ 32 ℃ and humidity ≤ 60%. The system is designed for monitoring environmental temperature and humidity at agricultural farms it can also be used in other applications like smart homes, industries to control temperature/humidity, poultry farms and environment monitoring in specific locations/areas.

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