Surface Mount Packaged IoT Computer

The Onion Omega2S IoT Computer Modules are designed for applications that require drop-in connectivity and computing. The 34x20x2.8 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.

  • Drop-in WiFi-enabled Linux compute 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 U.FL connector for external antenna
  • CPU, memory, and flash storage are built-in
  • Runs OpenWRT Linux operating system out of the box
  • Features USB, ethernet, MicroSD, 2x UARTs, I2C, SPI, GPIOs interfaces
  • FCC and CE certified

Send me the technical document package

The Onion Omega2S is a Wi-Fi enabled, Linux compute module, designed specifically for IoT applications. It provides a drop-in, low-power solution ideal for building IoT hubs and devices.

The module measures 34x20x2.8 mm and features a MIPS 24KEc processor running at 580 MHz, built-in DDR2 DRAM, flash storage, and a 2.4 GHz 802.11b/g/n Wi-Fi radio. It supports a wide variety of I/O protocols, with 42 pins available to the developer. The module is self-contained and only requires a power supply and an external WiFi antenna to operate.
By virtue of the Linux operating system, developers can create their own applications using a programming language of their choice, and make use of existing network stacks and a rich set of software packages to implement their desired software functionality.

Highlights on the software and operating system:

  • The operating system is based on the OpenWRT Linux distribution
    • Support for modern programming languages: Python (2.7 and 3.6), NodeJS
      (8.10), GoLang, C, C++, and others
  • The default device operating system image includes:
    • Onion’s enhanced WiFi driver
    • A package manager (opkg)
    • A lightweight web server (uhttpd) and an extendable Remote Procedure Call
      daemon (RPCD and ubus)
    • Utilities to control the GPIOs (gpioctl, fast-gpio) and pin multiplexing
    • The sysfs interface for programmatic control of the hardware interfaces
    • OnionOS, a web-based, graphical user interface for the Omega2 family
Omega2S (OM-O2S) RAM: 64MB, Flash: 16MB, Packaging: SMT
Omega2S+ (OM-O2SP) RAM: 128MB, Flash: 32MB, Packaging: SMT
For through-hole version of the Omega2S check out Omega2
For Development Kit check out Omega2S Development Kit
Chipset MT7688AN
Architecture MIPS24KEc
Clock Speed 580MHz
Flash 16MB (OM-O2S) or 32MB (OM-O2SP)
DDR2 DRAM 64MB (OM-O2S) or 128MB (OM-O2SP)
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
Antenna Connector U.FL connector for external antenna
Ethernet 1 (10M/100M)
USB 2.0 Host 1
I2C 1
I2S 1
GPIO Up to 30
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 34*20*2.8mm
Packaging Surface mount

Frequently asked questions

Purchase samples from our distributors Mouser and Digikey

The minimum quantity required to purchase the Omega2S module directly from Onion is 500 units. For smaller quantities we recommend purchasing from our distributors Mouser or Digikey for more cost effective shipping options.

The lead time for bulk Omega2 module orders is 6 weeks. If you need units immediately for evaluation or development, please order from our distributors Mouser or Digikey.

The Omega2S is guaranteed to be available until January 2028

Yes, the Omega2S and Omega2S+ modules have FCC, CE, and RoHS certification. Find the certification documents here:

Fill out the form here and our sales team will get back to you with volume pricing info and more.

Shipped from Shenzhen, China FOB or DAP. See our volume ordering page for more details.

See our volume ordering page for all of the details.

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Contact sales for availability and bulk pricing