Technical Articles
2025-01-06

Smart Monitoring and Control System with Custom Mobile App and Arduino

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Smart Monitoring and Control System with Custom Mobile App and Arduino
Smart Monitoring and Control System with Custom Mobile App and Arduino
Measure water level, temperature and humidity, video monitoring, control lighting switches, all with one app!

The video above demonstrates an automatic irrigation system controlled by Zhao (B Station: z点灯师) using Arduino and a mobile app. Related open-source materials can be clicked to read the original text for download.

System Hardware

Smart Monitoring and Control System with Custom Mobile App and Arduino
The hardware components of the automatic irrigation system include: Arduino control board, camera, network control board, relay control board, soil moisture collection (humidity and temperature), water level monitoring, and lighting control.
The schematic of the Arduino control board is shown below:
Smart Monitoring and Control System with Custom Mobile App and Arduino
The communication with the mobile phone uses a wireless video transmission module, which can be purchased on Taobao by searching for AR9331. I won’t specify which brand, you can find it by yourself.
The temperature and humidity detection uses the very practical DHT11, a digital signal output temperature and humidity sensor with accuracy of humidity ±5%RH, temperature ±2℃, humidity range 20-90%RH, temperature range 0~50℃.
Water level monitoring is done through a PN junction comparator that generates a digital signal, so when there is no water, it does not immediately display on the app. It will only change after the water dries up. The real water level sensor is not done this way, generally using a Hall sensor. You can replace it according to your needs; the code principle does not change much.

Mobile app control

Smart Monitoring and Control System with Custom Mobile App and Arduino
This system has designed a mobile app that can conveniently control remotely. The code for the app mini-program is also shared with everyone, and you can click to read the original text for download.
Mobile app display functions:
1) Display the measured water level, which can be divided into low, medium, and high levels.
2) Soil temperature and humidity detection, can display data for up to 3 different soils.
Mobile app control functions:
1) The app can be easily set to manual or automatic modes.
2) In automatic mode, a parameter can be set, and when the detected value is below this parameter, the relay will automatically turn on to supply water to the soil.
3) In manual mode, the relay can be controlled at any time to supply water to the soil.
4) Control the environment lights on and off.
Smart Monitoring and Control System with Custom Mobile App and Arduino
The app can also view images captured by the camera, and the app can control the camera’s movements for wider monitoring.
Smart Monitoring and Control System with Custom Mobile App and Arduino
The open-source mobile app program for the smart irrigation system based on Arduino has been released, and the control program can be clicked to read the original text for viewing.
Comments from Ni Mo

Smart Monitoring and Control System with Custom Mobile App and Arduino

Don’t underestimate Arduino, and don’t look down on using Arduino for projects. This project shared is a great example. Using Arduino for control, combined with a mobile app, to complete a smart irrigation project, can be used not only as a graduation project but can also be further developed. Adding a motor pump at the relay end makes it a very practical project.

To facilitate students in finding related graduation project plans, Darwin has added a special area for graduation project plans (click to read the original text), and is collecting graduation project ideas. If you are willing to share, please contact Ni Jie (WeChat: 459888529), or join the Darwin graduation exchange QQ group: 1081905597.

Every Thursday, we will send out a quality graduation project plan. Note: The complete plans provided by Darwin are for reference and learning only, and we do not encourage direct copying. Your defense teacher may also be a fan of Darwin.

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Smart Monitoring and Control System with Custom Mobile App and Arduino

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