How to upload Sketch to the Board?
=============================================

In this section, you will learn how to upload the sketch created previously to the Arduino board, as well as learn about some considerations.

1. Choose Board and port
----------------------------
Arduino development boards usually come with a USB cable. You can use it to connect the board to your computer.

Select the correct **Board** and **Port** in the Arduino IDE. Normally, Arduino boards are recognized automatically by the computer and assigned a port, so you can select it here.

    .. image:: img/Upload_Sketch1.png
        :width: 90%


If your board is already plugged in, but not recognized, check if the **INSTALLED** logo appears in the **Arduino UNO R4 Boards** section of the **Boards Manager**, if not, please scroll down a bit and click on **INSTALL**.

Search **"UNO R4"** in **Boards Manager** and check if the corresponding library is installed.

    .. image:: img/Upload_Sketch2.png
        :width: 90%

Reopening the Arduino IDE and re-plugging the Arduino board will fix most of the problems. You can also click **Tools** -> **Board** or **Port** to select them.
    
    .. image:: img/Upload_Sketch1-1.png
        :width: 90%

    .. image:: img/Upload_Sketch1-2.png
        :width: 90%

2. Verify the Sketch
---------------------------
After clicking the Verify button, the sketch will be compiled to see if there are any errors.

    .. image:: img/Upload_Sketch3.png
        :width: 90%

You can use it to find mistakes if you delete some characters or type a few letters by mistake. From the message bar, you can see where and what type of errors occurred. 

    .. image:: img/Upload_Sketch4.png
        :width: 90%

If there are no errors, you will see a message like the one below.

    .. image:: img/Upload_Sketch5.png
        :width: 90%


3. Upload sketch
-------------------------
After completing the above steps, click the **Upload** button to upload this sketch to the board.

    .. image:: img/Upload_Sketch6.png
        :width: 90%

If successful, you will be able to see the following prompt.

    .. image:: img/Upload_Sketch7.png
        :width: 90%

At the same time, the on-board LED blink.

.. image:: img/Upload_Sketch8.png
    :width: 400
    :align: center

.. raw:: html
    
    <br/>

The Arduino board will automatically run the sketch after power is applied after the sketch is uploaded. The running program can be overwritten by uploading a new sketch.