Low-cost, production-ready Linux modules for connected devices and sensors

The Onion Omega2 Linux Compute Modules are designed for applications that require drop-in connectivity and computing. The 42.9×26.4×9.9 mm package features a CPU, memory, flash storage, and a WiFi radio. It runs a Linux Operating System and is FCC certified, making it a small but powerful solution for IoT devices.

  • Wi-Fi enabled Linux-based module for IoT applications
  • Dual mode 2.4 GHz 802.11 b/g/n Wi-Fi - simultaneously host a WiFi access point and connect to existing WiFi networks
  • On-board WiFi antenna & U.FL connector for optional external antenna
  • CPU, memory, and flash storage are built-in
  • Runs OpenWRT Linux operating system out of the box
  • FCC and CE certified
  • Features USB, ethernet, MicroSD, 2x UARTs, I2C, SPI, GPIOs interfaces

The Omega2+ IoT computer is Onion’s Linux-based, WiFi development board designed to enable makers of all skill levels to build connected hardware applications. Plug in your Omega and it will boot the operating system right away, allowing you to develop in your favorite programming language, create web applications, and interface with a variety of hardware with minimal time and effort spent getting started.


At the Omega2+’s core is the MT7688 SoC that features a 580 MHz MIPS CPU, supports 2.4 GHz IEEE 802.11 b/g/n WiFi as well as 10M/100M wired ethernet network connectivity, and operates at 3.3V. The Omega2+ comes with 128MB of DDR2 DRAM memory and 32MB of on-board flash storage, double that of the Omega2! The storage space is expandable using the MicroSD card slot on the underside of the Omega2+.

The Omega was built to interact with other hardware, so it has a wide variety of hardware interfaces. It has dedicated pins for USB2.0 and Ethernet as well as 12 GPIO pins that can be controlled by the user. These GPIOs can support the I2C, UART, and SPI serial communication protocols.

The best part is that it’s tiny, measuring 1.7″ by 1″ it takes up minimal space in the project.


The Omega2+ runs an Onion-customized version of the LEDE (Linux Embedded Development Environment) Linux operating system, a distribution based on OpenWRT. Since there is a full Linux OS running on the Omega, users are not limited in their choice of programming language. Supported programming languages include:

  • C
  • C++
  • Python
  • NodeJS
  • Rust
  • Ruby
  • PHP
  • Perl
  • GoLang
  • Shell

The Omega’s OS comes equipped as a web server by default, so that other devices on the local network can interact with the Omega through a browser.

IoT Computer

So what makes the Omega2+ an IoT Computer? It’s a combination of the following:

  • Small form factor
  • Power efficiency
  • Processing, networking, and encryption capabilities
  • Flexibility that comes from running a Linux OS
    • Support for many programming languages and many simultaneous processes

The Omega2+ is powerful and flexible enough to be the brain of almost any IoT device.



Omega2 (OM-O2) RAM: 64MB, Flash: 16MB, Packaging: Through-Hole, SD-Card: No
Omega2+ (OM-O2P) RAM: 128MB, Flash: 32MB, Packaging: Through-Hole, SD-Card: Yes
For surface mount version of the Omega2 check out Omega2S
Chipset MT7688AN
Architecture MIPS24KEc
Clock Speed 580MHz
Flash 16MB (OM-O2) or 32MB (OM-O2P)
DDR2 DRAM 64MB (OM-O2) or 128MB (OM-O2P)
WiFi Protocol WEP64/128, AES, WPA, WPA2, WAP
Base Band 2.4GHz
Data Rate 150 Mbit/s
Channel Bandwidth 20/40 MHz
Operation Mode AP, STA, AP&STA
Encryption Mode IEEE 802.11 b/g/n
On-board Antenna 2 dBi directional chip antenna
Antenna Connector U.FL connector for optional external antenna
Ethernet 1 (10M/100M)
USB 2.0 Host 1
I2C 1
I2S 1
GPIO Up to 18
SD 1x MicroSD slot ( OM-O2P only)
Power Supply Requirement
DC Input 3.3V
No-load Running Current 200±40mA
Peak Current Requirement 800mA
Operation Conditions
Ambient Temperature -10°C ~ 55 °C
Storage Temperature -20°C ~ 80° C
Operating Humidity 10%-95%RH (Non-Condensing)
Storage Humidity 5%-95%RH (Non-Condensing)
Physical Specifications
Dimensions 42.9*26.4*9.9 mm
Packaging Through-hole
Pin Pitch 2mm
Total Pins 32