Molemi IoT
  • Space farming using food computers for sustainable farming
  • Introduction to Arduino
    • Introduction to Electronics
    • The Breadboard
  • Controlling LEDs with an Arduino
    • The Code
    • Adding a button to control the LEDs
      • The Code
  • Introducing Sensors
    • The CO2 and air quality sensor
    • The Code
      • Explaining the Code
    • Light Intensity Sensor
  • Introducing the NodeMCU
    • Getting Started
      • A simple test for ESP8266
        • The Code
    • A light bulb switch using NodeMCU and the Blynk app
      • Setup Blynk on your Smartphone
      • The Code
    • Controlling a Centurion gate Motor with NodeMCU a 2-channel relay
      • Installing Blynk in Arduino IDE
    • Read and display the water flow sensor on Blynk
      • Setting up Blynk
      • The Code
        • Explaining the code
    • Read and Display temperature sensor readings with NodeMCU.
      • Installing libraries for DS18B20 temperature sensor.
      • Displaying the sensor readings on the serial port
        • Getting temperature readings from different DS18B20 sensors.
          • The Code
            • Display sensor readings on a web server
              • Build the web server
                • Designing and building the web page
                • The Code
    • Display the DHT11 sensor reading on a web server using NodeMCU.
      • Monitoring Room Temp & Humidity using Blynk
      • Installing DHT library on the ESP8266
        • Installing the Asynchronous Web Server library
          • The Code
          • Designing and building the web page
  • Data Science for Farming
    • Getting Started with Colaboratory
    • Introduction to Python for DS using Colab
  • Machine Learning for Farming
  • Molemi Personal Food Computer
    • Bill of Materials
  • Setting up WaziGate on a Raspberry Pi
  • Setting up DHT11 on Raspberry Pi
  • Using Telegram To Control Outputs
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  1. Introducing the NodeMCU

Read and display the water flow sensor on Blynk

In this activity, we will be reading and displaying the water flow meter on blynk using NodeMCU.

PreviousInstalling Blynk in Arduino IDENextSetting up Blynk

Last updated 5 years ago

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What will you need?

  • NodeMCU with USB cable

  • Water Flow Sensor

  • Relay Switch

  • Blynk App

Setting up the circuit

  1. Connect the yellow wire from the water flow sensor to pin D2 of the NodeMCU board.

  2. Connect the black wire to the ground pin of the NodeMCU. Connect the red wire to the 3.3V pin.

  3. Download and install the Blynk app to your smartphone. Open the app and set up a New Project. The authentication key will be sent to you via the email that you used to register the Blynk app.

Connecting the water flow sensor to the NodeMCU (https://github.com/pkarun/Blynk-Flow-Sensor-Water-Meter)