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Published November 01, 2022 ©

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Flood Monitoring System

Flood monitoring and alert system using Wizfi360-EVB-PICO and Buzzer which alerts when levels of waterbodies are raised after certain level.

COMPONENTS Hardware components

WIZnet - WizFi360-EVB-Pico

x 1

Wiznet Board

Software Apps and online services

micropython - MicroPython

x 1

Thonny IDE


Flood monitoring using Wizfi360-EVB-PICO


Flood natural calamity which cannot be avoided totally every year the collateral damages increases due no early warning. To solve this problem, we demonstrates the idea and implementation of a Flood Monitoring and Alerting system using Internet of Things (IOT) technology To develop A Real Time Solution to Flood Monitoring Using IOT and Sensor Network, we proposed a flood warning system which requires attention to three basic factors: Data collection via gauging, data processing, and the hardware and software used, and the lack of flood warning information. The automated flood warning systems are surprisingly inexpensive to build, the factor which affect cost for any such system is the number of site locations where sensor should be implemented.

In this project, we will make Flood Monitoring System using Raindrop Sensor & Raspberry Pi Pico. A raindrop sensor is basically a board on which nickel is coated in the form of lines. It works on the principle of resistance. The rain Sensor module allows to the measurement of moisture via analog output pins and it provides a digital output when a threshold of moisture exceeds.

It stimulates the flood control alarm system, judges whether there is a flood disaster through the amount of rain detected by the sensor panel of the raindrop sensor, and then controls the buzzer to emit a siren sound


Hardware Required:-

  • Wizfi360-EVB-PICO
  • Raindrop Sensor Module 
  • Breadboard 
  • Buzzer 
  • .Jumper Wires 
  • Micro-USB Cable 

Software Required:-

  • Thonny IDE


  1. Wizfi360-EVB-PICO

WizFi360-EVB-Pico is based on Raspberry Pi RP2040 and adds Wi-Fi connectivity using WizFi360. It is pin compatible with Raspberry Pi Pico board and can be used for IoT Solution development.

  • Raspberry Pi Pico Clone
  • Wi-Fi (WizFi360) 


  • RP2040 microcontroller with 2MByte Flash
  • Dual-core cortex M0+ at up to 133MHz
  • 264kByte multi-bank high performance SRAM
  • External Quad-SPI Flash with eXecute In Place (XIP)
  • Includes WizFi360-PA
  • WiFi 2.4G, 802.11 b/g/n
  • Support Station / SoftAP / SoftAP+Station operation modes
  • Support “Data pass-through” and “AT command data transfer” mode
  • Support serial AT command configuration
  • Support TCP Server / TCP Client / UDP operating mode
  • Support configuration of operating channel 0 ~ 13
  • Support auto 20MHz / 40MHz bandwidth
  • Support WPA_PSK / WPA2_PSK encryption
  • Support built-in unique MAC address and user configurable
  • Industrial grade (operating temperature range: -40 ° C ~ 85 ° C)
  • CE, FCC certification
  • Includes 16M-bit Flash Memory
  • Micro-USB B port for power and data (and for reprogramming the Flash)
  • 40 pin 21x51 'DIP' style 1mm thick PCB with 0.1" through-hole pins also with edge castellations
  • 3-pin ARM Serial Wire Debug (SWD) port
  • Built-in LDO 


2. Rain Sensor:-

A sensor that is used to notice the water drops or rainfall is known as a rain sensor. This kind of sensor works like a switch. This sensor includes two parts like sensing pad and a sensor module. Whenever rain falls on the surface of a sensing pad then the sensor module reads the data from the sensor pad to process and convert it into an analog or digital output. So the output generated by this sensor is analog (AO) and digital (DO)

  • Operating voltage ranges from 3.3 to 5V
  • The operating current is 15 mA
  • The sensing pad size is 5cm x 4 cm with a nickel plate on one face.
  • Comparator chip is LM393
  • Output types are AO (Analog o/p voltage) & DO (Digital switching voltage)
  • The length & width of PCB module 3.2cm x 1.4cm
  • Sensitivity is modifiable through Trimpot
  • Red/Green LED lights indicators for Power & Output


3. Buzzer:-

  • Rated Voltage: 6V DC
  • Operating Voltage: 4-8V DC
  • Rated current: <30mA
  • Sound Type: Continuous Beep
  • Resonant Frequency: ~2300 Hz 
  • Small and neat sealed package
  • Breadboard and Perf board friendly

Circuit Diagram:-



















  • Flood sensor with Wiznet board

  • Flood sensor with Wiznet board


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