Water Tank Overflow Alarm System Using ESP8266

Sometimes the float valve of a water tank may not work properly causing water to overflow and spread across the floor. Peter Jennings faced this problem in his storage area, and he had developed an alarm device to notify him when the water exceeds its normal range.
Peter’s project includes a simple water sensor and ESP8266 wifi module connected with power switch circuit. When the water reach a specific threshold, the sensor will trig the switch to turn on the ESP8266, which will connect to a wireless network and send a message to a web server.
ESP8266 is a wifi module contains System-On-Chip (SOC) with integrated TCP/IP protocol stack that can give any microcontroller access to any WiFi network. The ESP8266 is capable of either hosting an application or offloading all Wi-Fi networking functions from another application processor. There are various versions of ESP8266 differ in size, shape and price. Peter used this $1.5 module, and you you are free in choosing your ESP8266 board.

Water Tank Overflow Alarm System Using ESP8266
ESP8266 ESP-01 Board

Mini Pushbutton Power Switch from Pololu, an electronics manufacturer and an online retailer, is the power switch circuit used in this project. It is a $4 power control alternative to bulky mechanical switches which is able to turn on and off any device using the mini push button on the board, the external on & off pins, or a control signal. This low-voltage version operates from 2.2 V to 20 V and can deliver continuous currents up to around 6 A.
Switch Water Tank Overflow Alarm System Using ESP8266
Mini Pushbutton Power Switch Board and Dimensions

The sensor which is used to detect the overflow is very simple, it is just two wires pinned inside the tank above the highest level that water should reach. One of these wires is connected t
o the Vin pin, and the other is connected to CTRL pin on the switch circuit. DC current will flow between the two wires when the water pass the limit sending a control signal to turn on the Wifi module.
This combination is powered by a range of 3 volts to 3.6 volts battery pack. The circuits should be connected as shown in the diagram:
For more detail: Water Tank Overflow Alarm System Using ESP8266


About The Author

Ibrar Ayyub

I am an experienced technical writer holding a Master's degree in computer science from BZU Multan, Pakistan University. With a background spanning various industries, particularly in home automation and engineering, I have honed my skills in crafting clear and concise content. Proficient in leveraging infographics and diagrams, I strive to simplify complex concepts for readers. My strength lies in thorough research and presenting information in a structured and logical format.

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