Onion Omega2+
Expert rating6.5 / 10
- SoC:
- MediaTek MT7688
- Memory:
- 128MB DDR2
- Wireless:
- WiFi 5
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Manufacturer: Onion Corporation Last updated: 2026-09-12
Onion Omega2+ (Single-Board Computer/MediaTek MT7688/580MHz MIPS/128MB RAM/Coin-Sized WiFi IoT Board) Review
Onion Omega2+ is a coin-sized WiFi-enabled Linux board running OpenWrt on a MediaTek MT7688, designed for IoT products and prototypes that need networked microcontroller-class hardware without a full desktop-class SBC.
The Omega2+ occupies the gap between an Arduino and a Raspberry Pi: it's small and cheap like a microcontroller board but boots real embedded Linux (OpenWrt) with WiFi built in, which makes tasks like a networked sensor node, a smart-home relay, or a small always-on web service far easier than wiring up a WiFi module to a bare MCU.
OpenWrt as an Application Platform
Rather than treating OpenWrt purely as router firmware, Onion built a dock and expansion ecosystem around the Omega2+ that positions it as a general embedded Linux platform: opkg package management, Python/Node support, and a web-based console make it approachable for makers who don't want to cross-compile.
Genuinely Tiny and Cheap
At roughly the size of a large coin and priced under fifteen dollars, the Omega2+ is easy to embed permanently into a 3D-printed enclosure or product prototype where a full Pi would be overkill on both size and cost.
Comparison to Alternatives
Compared to a Raspberry Pi Zero 2 W, the Omega2+ is far more limited in RAM and CPU but costs less and boots faster into a minimal OpenWrt image. Against the Sipeed Lichee RV, another ultra-budget board, the Omega2+'s built-in WiFi is the key differentiator for networked IoT use cases.
Specifications
Identity
| Brand | Onion Corporation |
|---|
| CPU Architecture | ARM |
|---|---|
| Memory | 128 GB |
| Storage Type | Onboard LPDDR |
| Has AI Accelerator / NPU | No |
| Wireless | WiFi 5 |
| GPIO Header | Yes |
| Price | 13 USD |
| Use Case | Ultra-Compact / Budget |
| Model | Omega2+ |
| SoC | MediaTek MT7688 |
| Processor | Single-Core MIPS 24KEc up to 580MHz |
| Storage | 32MB onboard flash + microSD slot |
| Connectivity | USB 2.0, UART/I2C/SPI/PWM GPIO, microSD |
| Operating System | OpenWrt (LEDE-based Omega firmware) |
Expert Review
Reviewed by Burooj Alam. Rated by us, not by users.
Expert rating6.5 / 10
A dependable, inexpensive choice for simple WiFi-connected embedded Linux projects, not a general computer.
Best for
- Networked IoT sensor and relay nodes
- Small always-on web/API services
- Learning OpenWrt-based embedded Linux
Not for
- Any desktop or GUI application
- Video, camera, or graphics workloads
- Projects needing more than minimal RAM headroom
FAQs
What are the key specifications of the Onion Omega2+ (Single-Board Computer/MediaTek MT7688/580MHz MIPS/128MB RAM/Coin-Sized WiFi IoT Board)?
The Onion Omega2+ (Single-Board Computer/MediaTek MT7688/580MHz MIPS/128MB RAM/Coin-Sized WiFi IoT Board) is a single board computer from Onion Corporation. Key specs: SoC MediaTek MT7688, CPU Architecture ARM, Processor Single-Core MIPS 24KEc up to 580MHz, Memory 128MB DDR2, Storage Type Onboard LPDDR.
Will the Onion Omega2+ (Single-Board Computer/MediaTek MT7688/580MHz MIPS/128MB RAM/Coin-Sized WiFi IoT Board) work with my current setup?
The Onion Omega2+ (Single-Board Computer/MediaTek MT7688/580MHz MIPS/128MB RAM/Coin-Sized WiFi IoT Board) lists SoC is MediaTek MT7688. Check that against the hardware you already own before buying, since this is the field that most often decides whether a part fits.
Who is the Onion Omega2+ (Single-Board Computer/MediaTek MT7688/580MHz MIPS/128MB RAM/Coin-Sized WiFi IoT Board) best suited to?
It suits networked iot sensor and relay nodes, small always-on web/api services, learning openwrt-based embedded linux.
What are the drawbacks of the Onion Omega2+ (Single-Board Computer/MediaTek MT7688/580MHz MIPS/128MB RAM/Coin-Sized WiFi IoT Board)?
It is a poor fit for any desktop or gui application, video, camera, or graphics workloads, projects needing more than minimal ram headroom.
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