Review on Temperature & Humidity Sensing using IoT

With the climatic conditions becoming a big concern among the environmentalists, a device that can monitor and stream the temperature differences in the environment is needed. The objective of this project is to develop an electronic device that can sense the temperature/ humidity difference and send the data to the cloud for analytics.

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You can use either an Arduino Uno or a Raspberry Pi to act as the microcontroller or simply the brain of the system. If you are using Arduino as your microcontroller, then you need a WiFi module to set up the internet connection. And a DHT sensor (Digital Humidity Temperature sensor) that can detect the temperature differences should be integrated to the system. The sensor will sense the temperature changes constantly and send the data to the microcontroller.

The microcontroller then sends the data to the cloud for storage and analysis purpose. You can also use IOT platforms like ThinkSpeak IoT to integrate the data onto cloud and make some analysis. Further this system can be modified to create some actuations like sending a tweet or switching on any device whenever the temperature/humidity falls below a threshold value.

Project Description:

1. Arduino Uno: The digital and analog input/output pins equipped in the board can be interfaced to various expansion boards and other circuits. Serial communication interface is a feature in this board, including USB which will be used to load the programs from computer.
2. Voltage regulator: It is used to maintain a constant voltage level and also used for regulating AC or DC voltages. A voltage regulator contain negative feed-forward design or it may also contain negative feedback control loops.
3. WiFi Module: ESP8266 WiFi module is generally used to establish the wireless communication between the devices. But this module is not capable of 5-3V logic shifting and will require an external logic level converter.
4. DHT Sensor: Digital humidity and temperature sensor is used to detect the differences in the temperature present in the environment. The data collected by the DHT11 sensor will be sent to the cloud for other purposes.

Project Implementation:

1. An application should be developed and installed in the mobile
2. ESP8266 WiFi module used for providing communication between the application and system
3. The DHT sensor will analyse the outside temperature & humidity, and convert the information into a digital signal output
4. All the data collected will sent to cloud (ThinkSpeak IOT platform) for storage and analysis

Software requirements:

1. You will be needing Arduino IDE software to write and upload the programming logic onto the Arduino Uno board
2. Also, you need to create an account in the ThinkSpeak IoT platform to integrate the system onto the cloud and store the data online

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Programming language: Arduino Programming (C++)

• Arduino Uno
• ESP-8266
• Voltage Regulator

• IoT
• Automation

Review on Temperature & Humidity Sensing using IoT