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How to Use Seeeduino Ethernet with Arduino Shield 7seg

  • The content is a tutorial on how to use Seeeduino Ethernet with Arduino Shield 7seg to display data from the internet, such as the current time and weather.
  • The content covers the steps of connecting the hardware, writing the code, testing the results, troubleshooting and optimizing the code, and answering some FAQs.

Seeeduino Ethernet is a compact and multifunctional development platform that combines data logging, device control, and Ethernet communication. It is compatible with Arduino and can be used with various Arduino shields, such as the 7-segment LED display shield (7seg).

In this tutorial, you will learn how to use Seeeduino Ethernet with Arduino Shield 7seg to display data from the internet, such as the current time, weather, or stock prices. You will also learn how to troubleshoot some common issues and optimize your code for better performance.

How to Use Seeeduino Ethernet

What You Need

To follow this tutorial, you will need the following items:

  • Seeeduino Ethernet board
  • Arduino Shield 7seg
  • Micro SD card (formatted in FAT or FAT32)
  • Ethernet cable
  • USB cable
  • Computer with Arduino IDE installed

How to Connect the Hardware

The first step is to connect the hardware components as follows:

  1. Insert the micro SD card into the slot on the Seeeduino Ethernet board.
  2. Plug the Ethernet cable into the RJ45 jack on the Seeeduino Ethernet board and connect it to your router or modem.
  3. Stack the Arduino Shield 7seg on top of the Seeeduino Ethernet board and align the pins.
  4. Connect the USB cable to the Seeeduino Ethernet board and your computer.

You should see the power LED on the Seeeduino Ethernet board light up and the 7-segment display show some random numbers.

How to Write the Code

The next step is to write the code that will fetch data from the internet and display it on the 7-segment display. You can use the Arduino IDE to write and upload the code to the Seeeduino Ethernet board.

Here are the main steps of the code:

  1. Include the necessary libraries, such as SPI, Ethernet, SD, and SevSeg.
  2. Define the pins for the 7-segment display and the Ethernet chip select.
  3. Initialize the Ethernet client, the SD card, and the 7-segment display objects.
  4. Define the variables for the data source URL, the data buffer, and the display mode.
  5. In the setup function, initialize the serial monitor, the Ethernet connection, and the 7-segment display.
  6. In the loop function, check the display mode and call the corresponding function to fetch and display the data.

You can modify the code to display different data sources or formats, such as temperature, humidity, currency, etc.

How to Test the Results

The final step is to test the results and see if the code works as expected. You can use the serial monitor to debug the code and see the data received from the internet.

To test the code, follow these steps:

  1. Open the Arduino IDE and select the correct board (Seeeduino Ethernet) and port from the Tools menu.
  2. Copy and paste the code from the link into a new sketch and save it.
  3. Click the Upload button to upload the code to the Seeeduino Ethernet board.
  4. Open the serial monitor and set the baud rate to 9600.
  5. You should see the IP address of the Seeeduino Ethernet board and the data received from the internet in the serial monitor.
  6. You should also see the data displayed on the 7-segment display, alternating between the current time and the weather.

Troubleshooting and Optimization

If you encounter any problems or errors while following this tutorial, here are some possible solutions and tips:

  • Make sure the micro SD card is formatted in FAT or FAT32 and has enough space.
  • Make sure the Ethernet cable is connected properly and the router or modem has internet access.
  • Make sure the Arduino Shield 7seg is compatible with the Seeeduino Ethernet board and the pins are aligned correctly.
  • Make sure the libraries are installed and updated in the Arduino IDE.
  • Make sure the data source URL is valid and returns the data in the expected format.
  • Adjust the delay time and the display mode according to your preference and the data refresh rate.

Frequently Asked Questions (FAQs)

Here are some frequently asked questions related to this tutorial:

Question: What is the difference between Seeeduino Ethernet and Arduino Ethernet Shield?

Answer: Seeeduino Ethernet is a standalone board that has a built-in Ethernet controller (Wiz5100) and a microcontroller (ATmega328P). Arduino Ethernet Shield is an add-on board that requires an Arduino board to work. It also uses the Wiz5100 Ethernet controller.

Question: How can I change the data source or format for the 7-segment display?

Answer: You can change the data source by modifying the URL variable in the code. You can also change the format by modifying the parseData and displayData functions in the code. For example, you can use the String class methods to extract, convert, or concatenate the data.

Question: How can I use other Arduino shields with Seeeduino Ethernet?

Answer: You can use other Arduino shields with Seeeduino Ethernet as long as they are compatible and do not use the same pins as the Ethernet controller or the 7-segment display. You can also use the Grove connectors on the Seeeduino Ethernet board to connect other Grove modules.


In this tutorial, you learned how to use Seeeduino Ethernet with Arduino Shield 7seg to display data from the internet. You learned how to connect the hardware, write the code, and test the results. You also learned how to troubleshoot some common issues and optimize your code for better performance.

We hope you enjoyed this tutorial and learned something new. If you have any questions or feedback, please leave a comment below.

Disclaimer: This tutorial is for educational purposes only and does not constitute professional advice. The author and the website are not responsible for any damages or losses caused by following this tutorial. Please use the information at your own risk.

Alex Lim is a certified IT Technical Support Architect with over 15 years of experience in designing, implementing, and troubleshooting complex IT systems and networks. He has worked for leading IT companies, such as Microsoft, IBM, and Cisco, providing technical support and solutions to clients across various industries and sectors. Alex has a bachelor’s degree in computer science from the National University of Singapore and a master’s degree in information security from the Massachusetts Institute of Technology. He is also the author of several best-selling books on IT technical support, such as The IT Technical Support Handbook and Troubleshooting IT Systems and Networks. Alex lives in Bandar, Johore, Malaysia with his wife and two chilrdren. You can reach him at [email protected] or follow him on Website | Twitter | Facebook

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