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  • Arduino - Web Serial Monitor

    Web Serial Monitor is one of the built-in embedded web apps in PHPoC [WiFi] Shield.

    Web Serial Monitor is similar to Serial Monitor on Arduino IDE, except for the following points:
    • Web Serial Monitor is accessed on web browser through Internet (Serial Monitor is accessed on Arduino IDE through USB cable).
    • Web Serial Monitor can be accessed from any OS (Android, iOS, Windows, macOS, Linux...) without any installation. Therefore, you can monitor Arduino from mobile devices.



    This tutorial shows how to use Web Serial Monitor.

    Hardware Required


    Circuit
    • Stack PHPoC Shield or PHPoC WiFi Shield on Arduino Uno or Mega

    Note that: Arduino communicates with PHPoC [WiFi] Shield via pins 10, 11, 12 and 13 on the Uno, and pins 10, 50, 51 and 52 on the Mega. Therefore, these pins CANNOT be used for general I/O.



    How Serial Monitor and Web Serial Monitor Works

    How Serial Monitor works

    Serial Monitor is a tool that is available on Arduino IDE and Arduino Web Editor.
    - On Arduino IDE, Serial Monitor reads data that is sent by Arduino through serial port, and then displays the data.
    - On Arduino Web Editor, a plugin reads data that is sent by Arduino through serial port and pass the data to Serial Monitor. Serial Monitor displays the data.


    How Web Serial Monitor Works

    Web Serial Monitor is a built-in web app, which is stored in PHPoC [WiFi] Shield.
    When users access this web app in web browser, a WebSocket connection is created between web browser and PHPoC [WiFi] Shield.
    PHPoC [WiFi] Shield read datas that is sent by Arduino through serial port, and then send the data to web app through WebSocket connection. Web app displays the data



    Serial Monitor vs Web Serial Monitor

    The Commons
    • Display data that is sent by Arduino through Serial.

    The Differences
    Web Serial Monitor's functionalities are similar to Serial Monitor's functionalities. Especially, Web Serial Monitor has the following addvangages:
    • Can be accessed via Internet. There is no limit about distance.
    • Run on any platform that has a web browser (Windows, macOS, Linux, Android, iOS...). Therefore, data can be displayed on mobile devices.




    Install Arduino IDE

    If you have not install Arduino IDE yet, please download and install Arduino IDE .




    Install Library
    • Run Arduino IDE.
    • Navigate to Sketch > Include Library > Manage Libraries

    • Search "Phpoc" on search bar of the Library Manager.

    • Select the PHPoC library and press the [Install] button.

    • Restart Arduino IDE for the next step.


    Setup Network Information
    This part is needed only for the first use.

    1. If Ethernet is used
    In case of using PHPoC Shield (P4S-348), you have two options to connect to network: Ethernet or WiFi.
    If using Ethernet, please follow this instruction to connect the shield to Ethernet.


    2. If WiFi is used
    WiFi is available in both P4S-347 and P4S-348. Please follow:

    Source Code
    • Open "DataTime" example on Arduino IDE or any example that print data to Serial.
    • Compile the example code and upload to Arduino by clicking "Upload" button on Arduino IDE



    Test and Result
    • Open a web browser from PC, smartphone or tablet.
    • Type IP address of PHPoC [WiFi] Shield on address bar. If you do not know IP address of PHPoC [WiFi] Shield, see this instruction.
    • Web browser shows web page that displays the list of web app.
    • Click Web Serial Monitor icon. (You can also access directy by typing: ip_address/serial_monitor.php).

    • Click "Connect" button and see the data is displayed.

    • Data is displayed.

    • If you are connecting Arduino to Arduino IDE, you can open Serial Monitor by navigating to "Tools" -> "Serial Monitor" on Arduino IDE.
      The displayed data is the same as Web Serial Monitor.




    Web Customization
    The web app has been created and preload to PHPoC [WiFi] Shield. User does not need to write the web code. User just needs to write Arduino code based on the Arduino example. However, user can modify user interface of web app via a setting page.

    Custommable Parameters:
    • Baud Rate: selectable value.
    • Width: settable value.
    • Height: settable value.



    How To
    • Click "Setup" on Web App
    • It shows setup page. The below is default setting.
    • Change setting parameters as you want.



    See Also


    References
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