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    Blinking LED using Arduino UNO

    Arduino
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    • abijith
      abijith last edited by

      It is the simple basic project created using Arduino. LED (Light Emitting Diode) is an electronic device, which emits light when the current passes through its terminals. LED's are used in various applications. It is also used as an ON/OFF indicator in different electronic devices.

      In this project, we will connect the LED to the digital pin on the Arduino board. The LED will work as a simple light that can be turned ON and OFF for a specified duration.

      Video Link :

      What is Arduino and how to use Arduino | Write your first program Now! | Malayalam
      salmanfaris 1 Reply Last reply Reply Quote 1
      • salmanfaris
        salmanfaris @abijith last edited by

        @abijith Thanks for sharing 🙌.

        1 Reply Last reply Reply Quote 0
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        • S

          @salmanfaris It was working in CLI, but now it's showing multiple usages at the portmultiple usage.png

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        • @sivanath Does the local pub and sub is working over CLI?

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        • S

          @salmanfaris Yes, I had tried that before and it was working fine. Infact, everything works perfectly when I connect with the online mqtt server, test.mosquitto.org. So, there's some problem with the local installation, while using my local IP. But I can't find that problem. I had also re-installed the mqtt, but still the same issue.

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        • @sivanath Before connecting via NodeRED , Could you try to create MQTT Subscribe and Publish client using the CLI and see it can transfer message payload with the same broker name?

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        • S

          @salmanfaris It is running locally on my computer. Yes, and is running in the background.
          cmd.png

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