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Monitoring and Controling Tools by humidity and temperature

"A smart IoT-based system that monitors and controls temperature and humidity in real-time, combining precision, automation, and remote accessibility in one compact device."

Monitoring and Controling Tools by humidity and temperature
 
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Hardware Components

  • SIM900A Module SIM900 GSM GPRS SHIELD Serial SIM 900A n Antena a

    X 1

  • Ac Light Dimmer Robotdyn Module 2 Dual Channel 220V 110V Logic 5

    X 1

  • FOTEK SSR-25DA-H MADE IN TAIWAN SSR 25DAH Solid State Relay Fote

    X 1

  • TTL RS232 TO RS485

    X 1

  • Saklar Power Rocker Switch On Off Saklar Roker Mini KCD-1 2pin 3

    X 1

  • Box Project X5 Hitam Plastik 145x95x50 mm Case Enclosure for Ard

    X 1

  • Header FCP 1X40 MALE 2.54MM

    X 1

  • Power Supply SMPS 5V 12V 24V AC-DC 220V TO 12V 24V 5V 1A 1.5A 2A

    X 1

  • Temperature and Humidity Transmitter Modbus SHT20 Sensor

    X 1

  • Expansion Shield Terminal Adapter IO Shield For Arduino Nano V3

    X 1

  • ARDUINO NANO V3 ATMEGA328P CH340G 5V BOARD TYPE-C

    X 1

  • PCB POLOS DOUBLE LAYER FR4 FIBER 10X15CM

    X 1

  • LED Diffused Round

    X 1

Goods

Tools, APP Software Used etc.

  • RemoteXY mobile app

    Evgeny Shemanuev
    fenxiang

  • Arduino IDE for programming, Blynk IoT app for real-time monitor

  • Particle Build Web IDE

Story

This project is a smart temperature and humidity monitoring system using an Arduino Nano, DHT22 sensor, and SIM900A GSM module, designed to automatically control a heater and fan through solid-state relays (SSR) based on real-time environmental data. The system displays current readings on a 16x2 I2C LCD and allows remote access via SMS commands, making it ideal for applications such as greenhouses, incubators, or temperature-sensitive storage rooms. With simple components, reliable GSM connectivity, and an efficient control mechanism, this project offers a practical and low-cost solution for remote climate control without relying on Wi-Fi networks.

Code

  • Program Source Simple code

    sketch_Code_MNT_1066188544687eeb8c07677.zip
    Download(4)
Schematic and Layout

  • wiring diagram

    Screenshot_2025-07-22_094004_601860172687eec17db8ad.png
    Download(4)
CAD-Custom parts and enclosures

  • Technical drawing

    Screenshot 2025-07-22 090411.png
    View
Topic
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#Electrical
License: Attribution-ShareAlike (CC BY-SA)

Monitoring and Controling Tools by humidity and temperature

"A smart IoT-based system that monitors and controls temperature and humidity in real-time, combining precision, automation, and remote accessibility in one compact device."

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  • Comments( 2 )
  • Like( 13 )
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  • David
    nice project
    Jul 24,2025 0 comments
    Reply
  • Uchechukwu George
    really nice!
    Sep 10,2025 0 comments
    Reply

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