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Product description: Ethernet Network Module for Teensy 4.1 - SparkFun PRT-29920
The SparkFun Teensy 4.1 Ethernet Adapter allows you to connect your Teensy board to an Ethernet network using a wired RJ45 interface. The module is based on the solution found in the Ethernet Kit for Teensy 4.1 , but all the key components are integrated onto a single board and pre-soldered . This eliminates the need for complicated assembly of an Ethernet transformer or RJ45 socket. The board includes an RJ45 connector, a B10601S Ethernet transformer, and a 6-pin 2x3 connector with a 2mm pitch . The adapter works with the Arduino Ethernet library and the Teensyduino environment, enabling the creation of IoT devices, network servers, automation systems, and projects that communicate over a local network or the internet.

The adapter board includes an RJ45 Ethernet connector, a B10601S Ethernet transformer, and a 2x3 2mm connector.
Main features of the module
- Ethernet connectivity : connect the Teensy 4.1 to a wired network
- RJ45 connector : ready-made network socket, factory-soldered
- B10601S Ethernet Transformer : Supports network communication and signal separation
- Compact design : all components integrated on one board
- 2x3 2mm connector : communication with Teensy 4.1 board via ribbon cable
- Arduino IDE support : Ethernet and Teensyduino library support
- Easy integration : simplified installation compared to the classic Ethernet Kit
- Perfect for IoT projects : support for network communication in embedded applications
Teensy Ethernet Adapter Pinout and Compatibility
The adapter is designed specifically for the Teensy 4.1 board and communicates with it via a 2x3 connector with a 2mm pitch. The connection requires a 2x3 ribbon cable and a 2x3 male goldpin connector , which must be soldered to the Teensy 4.1 board. Once connected, the adapter provides full hardware support for Ethernet communication. The board includes a pre-soldered RJ45 connector and a B10601S Ethernet transformer responsible for handling network signals. The adapter works with the Arduino IDE and the Teensyduino add-on and supports the Arduino Ethernet library . The module is suitable for IoT projects, HTTP servers, MQTT communications, industrial automation, and devices communicating over LAN.
Ethernet Adapter Technical Specifications
- Compatibility: Teensy 4.1
- Network interface: Ethernet RJ45
- Ethernet transformer: B10601S
- Communication connector: 2x3 2 mm
- Connection type to Teensy: 2x3 ribbon cable
- Supported environments: Arduino IDE, Teensyduino
- Supported libraries: Ethernet Library
- Assembly: Basic soldering required
- Dimensions: 39.37 x 29.21 mm
Contents of the set
- 1x Ethernet Adapter for Teensy 4.1
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