ET-C11
W5500 Ethernet Board
Wired 10/100 Ethernet over SPI with hardwired TCP/IP
AED 39.00
Out of stockOverview
Wired 10/100 Ethernet over SPI with hardwired TCP/IP
The ET-C11 is built around the WIZnet W5500 — hardwired TCP/IP (8 sockets, 32KB buffer), 10/100 PHY. It connects over SPI up to 80MHz (3.3V (5V-tolerant inputs)) and is powered from VIN 3.3–5.5V → AP2112K (W5500 ~130mA).
Designed in Dubai by ElectroTrical — the full schematic, BOM and design notes are published below.
Good for
- Reliable wired IoT nodes
- ESPHome Ethernet
- Modbus TCP and MQTT gateways
Key features
What makes it different
Controller
WIZnet W5500: hardwired TCP/IP (8 sockets, 32KB buffer), 10/100 PHY
Interface
SPI up to 80MHz (3.3V, 5V-tolerant inputs)
Network
RJ45 MagJack with link/activity LEDs, auto-negotiation (PMODE = 111)
Supply
VIN 3.3–5.5V → AP2112K (W5500 ~130mA)
Open documentation
Schematic, BOM and layout notes published for every board.
Breadboard friendly
Standard 2.54 mm pitch and M2.5 mounting holes.
Specifications
Technical specifications
| Controller | WIZnet W5500: hardwired TCP/IP (8 sockets, 32KB buffer), 10/100 PHY |
|---|---|
| Interface | SPI up to 80MHz (3.3V, 5V-tolerant inputs) |
| Network | RJ45 MagJack with link/activity LEDs, auto-negotiation (PMODE = 111) |
| Supply | VIN 3.3–5.5V → AP2112K (W5500 ~130mA) |
| Size | 35.6 × 25.4 mm |
|---|---|
| Mounting | 4 × M2.5 holes, 2.54 mm from each corner |
| Connectors | 10-pin 2.54 mm header |
| Main IC | W5500 (LCSC C32843) |
| Revision | Rev A |
| Libraries | Arduino Ethernet library, WIZnet ioLibrary, ESPHome ethernet: type: W5500, MicroPython WIZNET5K |
|---|
Performance
Speed
Pinout
Pin map and connections
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VIN | Power | 3.3–5.5V |
| 2 | GND | Ground | Ground |
| 3 | 3V3 | Power | LDO out |
| 4 | GND | Ground | Ground |
| 5 | RST | Control | Active low |
| 6 | INT | Output | Active low |
| 7 | CS | SPI | SCSn |
| 8 | SCK | SPI | ≤80MHz |
| 9 | MOSI | SPI | MOSI |
| 10 | MISO | SPI | MISO |
Mechanical
Dimensions and what's in the box
In the box
- 1 × ET-C11 W5500 Ethernet Board (assembled)
- 1 × 10-pin 2.54 mm male header, unsoldered
Getting started
- Wire the header: VIN, GND, 3V3, GND, RST, INT
- Libraries: Arduino Ethernet library, WIZnet ioLibrary, ESPHome
ethernet: type: W5500, MicroPython WIZNET5K
Compare
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| Best for | Reliable wired IoT nodes | Long-range sensor links | Reliable nRF24 links |
| Price | 39 AED | 59 AED | 9 AED |
Downloads
Documents and design files
Need a custom version of this board?
Different connector, size or sensor? We design and build custom variants.