Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Development, Learning, Evaluation & Industrial Control Boards |
| Origin | - |
| Chipset | W5100 |
| Compatibility | Arduino UNO R3, Mega 2560 |
| Interface | SPI / Ethernet RJ45 |
| Storage Support | Micro SD Card (up to 32GB) |
| Operating Voltage | 5V DC |
| Data Transfer Rate | 10/100 Mbps |
| LED Indicators | LINK, TX, RX, Power |
| Dimensions | 54mm x 28mm x 18mm |
| Weight | 12g |
| Library Support | Standard Arduino Ethernet Library |
Anonymous
Mar 26, 2026
Rating: 4/5
Good but needs careful stacking
The module functions well for network connectivity. Just make sure the pins align perfectly when stacking on the Arduino to avoid connection issues. Once set up, it's very stable.
Anonymous
Mar 26, 2026
Rating: 5/5
Excellent build quality
Solid PCB and good soldering points. I used this for a weather station project that logs data to an SD card and uploads to a server. No dropped packets so far.
Anonymous
Mar 20, 2026
Rating: 4/5
Great addition to UNO
Adds necessary networking capabilities to the basic UNO board. The LEDs are bright and helpful for debugging connection status. Slightly bulky but fits well in most enclosures.
Anonymous
Mar 17, 2026
Rating: 5/5
Perfect for IoT Projects
This board worked flawlessly with my UNO R3. The W5100 chip is reliable, and setting up the SD card slot was straightforward using standard libraries. Great value for money.
Anonymous
Mar 10, 2026
Rating: 5/5
Reliable Ethernet connection
I've tested this with both DHCP and static IP configurations. Both work perfectly. The SD card reader is a nice bonus for local data logging.
Anonymous
Mar 09, 2026
Rating: 3/5
Works but documentation could be better
The hardware is fine, but I had to search online for example code since the included manual was sparse. Once I found the right library examples, it worked as expected.
Q: What file system format is required for the SD card?
A: The SD card should be formatted in FAT16 or FAT32 file system for the module to read and write data correctly.
Q: Does this board support PoE (Power over Ethernet)?
A: No, this specific W5100 module does not support Power over Ethernet. It must be powered via the connected Arduino board or an external 5V source.
Q: Does it come with a protective case?
A: No, this package includes only the Ethernet expansion board module. Cases or enclosures must be purchased separately.
Q: Can I use this with an Arduino Mega 2560?
A: Yes, it is compatible with the Arduino Mega 2560. However, you may need to adjust the SS pin definition in your code to match the Mega's SPI pins.
Q: Is the RJ45 connector shielded?
A: The connector has a metal housing which provides basic shielding, but for high-interference environments, additional external shielding might be beneficial.
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