W5100 Ethernet Shield is an Arduino  compatible ethernet shiled based on W5100 ethernet module. It has an in built slot for Micro SD card.

This Shield allows an Arduino board to connect to the internet. It is based on the Wiznet W5100 ethernet chip. The Wiznet W5100 provides a network (IP) stack capable of both TCP and UDP. It supports up to four simultaneous socket connections. Use the Ethernet library to write sketches which connect to the internet using the shield.

The ethernet shield connects to an Arduino board using long wire-wrap headers which extend through the shield. This keeps the pin layout intact and allows another shield to be stacked on top.

Arduino uses digital pins 10, 11, 12, and 13 (SPI) to communicate with the W5100 on the ethernet shield. These pins cannot be used for general i/o.

The shield provides a standard RJ45 ethernet jack.

The reset button on the shield resets both the W5100 and the Arduino board

The shield contains a number of informational LEDs:

  • PWR: indicates that the board and shield are powered
  • LINK: indicates the presence of a network link and flashes when the shield transmits or receives data
  • FULLD: indicates that the network connection is full duplex
  • 100M: indicates the presence of a 100 Mb/s network connection (as opposed to 10 Mb/s)
  • RX: flashes when the shield receives data
  • TX: flashes when the shield sends data
  • COLL: flashes when network collisions are detected

Question & Answer

Total 13 questions

Q: Can I use It direct with relay Questioned by Akhter, 01-Nov-2014

You can connect the switching pin of a relay with the shield's I/O pin. But to control (on/off) a load with ac, you need relay shield/module. Answered by A.R, 02-Nov-2014 05:13 AM

Q: You can connect the switching pin of a relay with the shield's I/O pin. But to control (on/off) a load with ac, you need relay shield/module. Questioned by A.R, 02-Nov-2014

Q: The ss pin is located in Digital pin 4 for SD card. Please mention this in the Description clearly to avoid confusions. Questioned by ananto_alive, 14-Nov-2014

Q: What is the MAC address of the schield. Bought one but can not connect to the internet. Questioned by bdatanu, 02-Feb-2015

You can you the following address: mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }; particularly this Ethernet shield doesn't have any mac address. This product needs to be registered for mac address to mac giving companies. There are several Ethernet chips on the market . You can work with them with the above mentioned MAC. but while you will use them commercially you will have to register the IC for the permanent dedicated mac address. Answered by ferdaus, 08-Feb-2015 08:55 AM

Original Ardunio Ethernet shield has dedicated mac address. You can use that one. Answered by ferdaus, 08-Feb-2015 09:01 AM

Q: how long before this is back in stock? Questioned by Shahad, 09-Apr-2015

Q: When will it be available again? Questioned by isti_pb, 05-May-2015

Q: have any tutorial (code) for arduino Questioned by borhanreo, 08-Nov-2015

Q: I brought a Arduino uno. i want to buy a ethernet shielf and I want to controll light, fan and other load with using internet. how it possible? give me details pls. Questioned by shajibeng, 18-Feb-2016

We do not provide codes, designs etc. That is totally the customer's concern. However, it's possible to control loads through the internet using ethernet shield . You will find may youtube videos and other documents of such projects. Answered by A.R, 18-Feb-2016 04:42 AM

thanks Answered by shajibeng, 18-Feb-2016 08:24 AM

Q: I have bought one, and however/whatever i try, it is not working.. I've bought this before, that works with same code.. but the recent one does not work.. Has techshopbd any replace/return policy? Questioned by KhairulHasanmd, 28-Feb-2016

What is your invoice number? Answered by AshrafPRO, 28-Feb-2016 05:20 AM

#120401 Answered by KhairulHasanmd, 21-Apr-2016 10:59 AM

Dear, we are always sincere about our customers. According to our return policy, if you have any problem for interfacing with our product, you have to inform us within 7 days from your product received date. But your order is placed on 17-January-2016, and you have made a complain on 28-February-2016. This has broken our return policy rule. Thus why, this is not possible to return this product. If you want, you can send this product to us, so that we can check this product with our “Technical Team”. Then our technical team will submit the result to you. Answered by FAHIM_REAZA, 23-Apr-2016 05:56 AM

Q: I have bought one today, and it is not working :-( however/whatever i try, I've another ethernet shield that's worked perfectly but it's only showing power light nothing else. techshopbd please help. Questioned by ranabibu, 14-Feb-2017

error code Arduino: 1.8.1 (Windows 8), Board: "Arduino/Genuino Uno" Sketch uses 10466 bytes (32%) of program storage space. Maximum is 32256 bytes. Global variables use 653 bytes (31%) of dynamic memory, leaving 1395 bytes for local variables. Maximum is 2048 bytes. C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avrdude -CC:\Program Files (x86)\Arduino\hardware\tools\avr/etc/avrdude.conf -v -patmega328p -carduino -PCOM9 -b115200 -D -Uflash:w:C:\Users\BIBU\AppData\Local\Temp\arduino_build_831578/WebServer.ino.hex:i avrdude: Version 6.3, compiled on Dec 16 2016 at 13:33:19 Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/ Copyright (c) 2007-2014 Joerg Wunsch System wide configuration file is "C:\Program Files (x86)\Arduino\hardware\tools\avr/etc/avrdude.conf" Using Port : COM9 Using Programmer : arduino Overriding Baud Rate : 115200 avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x56 avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0x56 avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 3 of 10: not in sync: resp=0x56 avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 4 of 10: not in sync: resp=0x56 avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 5 of 10: not in sync: resp=0x56 avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 6 of 10: not in sync: resp=0x56 avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 7 of 10: not in sync: resp=0x56 avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 8 of 10: not in sync: resp=0x56 avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 9 of 10: not in sync: resp=0x56 avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x56 avrdude done. Thank you. Problem uploading to board. See http://www.arduino.cc/en/Guide/Troubleshooting#upload for suggestions. This report would have more information with "Show verbose output during compilation" option enabled in File -> Preferences. Answered by ranabibu, 14-Feb-2017 11:01 AM

At first please upload the code to arduino, then you connect the shield and work. If still you face problem, please inform us. Answered by A.R, 14-Feb-2017 11:35 AM

it's not working yet :-( Answered by ranabibu, 14-Feb-2017 11:55 AM

Q: will it work directly with mega 1250 or do i need to redirect the connections? Questioned by SMARTKid, 23-Feb-2017

Q: I bought one a few days ago but the problem is the w5100 chip is getting intensely hot after powering it. is it normal for this shield? Questioned by ASIFUZZAMANKHAN, 12-Sep-2017

No. This is not normal. What is your order ID? Answered by A.R, 12-Sep-2017 09:10 AM

# 141190 Answered by ASIFUZZAMANKHAN, 12-Sep-2017 16:23 PM

Please send the product back with a copy of your invoice. WE must check that first to give you a solution. Answered by A.R, 13-Sep-2017 03:43 AM

Thanks! New one is working great Answered by ASIFUZZAMANKHAN, 14-Sep-2017 15:50 PM

Q: Is it compatible with arduino mega? Questioned by Mahabub.power, 04-Jun-2021

Yes, compatible with Arduino Mega. Answered by almamun3248, 07-Jun-2021 08:50 AM

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