The Omega2+ Expansion Dock is a development board that provides all of the interfaces your various modules, sensors, and USB devices might require. Access SPI, I²S, I²C, UART, USB 2.0, and Ethernet without the need for additional breadboards or soldering. Just plug the expansion dock into your Omega2+, and use it like you would a Raspberry Pi or any other single-board computer.

Efficient, Convenient, and Affordable

Here at Factorial Group, we have incorporated the Onion Omega2+ into several of our IoT, industrial automation, and robotics projects. Along the way, we encountered a number of challenges:

• A lack of full-featured Omega2+ development boards—in order to get the full set of peripherals we need, we've had to use several different off-the-shelf boards and modules at the same time
• The high cost and inconvenience of designing and manufacturing a custom development board
• Even with a custom board, connecting a large number of modules and sensors often requires the use of additional breadboards and more than a little solder

To address these shortcomings, we decided to design and manufacture a convenient, inexpensive dev board for embedded Linux developers and other users of the Omega2+.

Features & Specifications

• USB 2.0
• MicroUSB for serial communication (via CH340 USB-TTL converter) and power delivery
• Ethernet
• On/Off switch with LED power indicator
• Reset button
• One user-programmable LED and one user-programmable button
• Linear voltage regulator (3.3 V)
• ESD protection scheme
• 2.54 mm GPIO headers
• Individual 2.54 mm headers for I²S, SPI, UART/I²C, 3.3 V, 5 V, and GND
• Dimensions: 5.9 cm x 7.5 cm