Omega2S
Onion’s Omega2S is a smaller, surface-mount packaged version of the through-hole Omega2. It is designed to provide drop-in computing and connectivity for IoT devices and applications. The module has two variants, the Omega2S and Omega2S+.
Variants
Both variants come with built-in WiFi, a Linux operating system, flexible GPIOs, and a powerful processor. The Omega2S+ has a larger memory module and extra storage.
| Specifications | Omega2S | Omega2S+ |
|---|---|---|
| Processor | 580MHz MIPS CPU | 580MHz MIPS CPU |
| Memory | 64MB | 128MB |
| Storage | 16MB | 32MB |
| USB 2.0 | 1 | 1 |
| SD/eMMC | 1 | 1 |
| Ethernet | 1 | 1 |
| WiFi adapter | b/g/n Wi-Fi | b/g/n Wi-Fi |
| GPIOs | 37 | 37 |
| PWM | 4 | 4 |
| UART | 3 | 3 |
| I2C | 1 | 1 |
| SPI | 1 | 1 |
| I2S | 1 | 1 |
Differences from Omega2
Onion's Omega2S is ideal for high volume production with its low profile, extended feature set, and production friendly design.
| Omega2 | Omega2S |
|---|---|
| Plug-in module | Surface-mount module |
| 42.9 x 26.4 x 9.9mm | 34 x 20 x 2.8mm (low profile) |
| 32 pins | 63 pins |
| MicroSD slot | Pins for SD/eMMC on pinout |
| 2 UARTs | 3 UARTs |
| 2 PWM channels | 4 PWM channels |
| -- | Exposes SPI Chip-Select 0 (CS0) pin |
| On-board antenna | Antenna signal pin and U.FL connector |
| On-board system status LED | System status pin to connect an external LED |
| Built-in pull-up resistors on I2C bus | Requires external pull-up resistors |
Resources
Omega2S Datasheet
For further details on the Omega2S module, please see the datasheet on GitHub: https://github.com/OnionIoT/Omega2/blob/master/Documents/Omega2S%20Datasheet.pdf
Omega2S Hardware Design Guide
If you plan to develop custom hardware using the Omega2S modules, please refer to our hardware design guide on GitHub site: https://github.com/OnionIoT/Omega2/blob/master/Documents/Omega2S%20Hardware%20Design%20Guide.pdf
Omega2S Development Kit
The Omega2S development kit lets you evaluate the Omega2S module's functionality and start developing your IoT product.
The kit includes:
- Easy insertion socket for the Omega2S module
- USB, Micro-USB, and Ethernet connectors
- Connector pins for all Input/Output signals
- Dual reset functions
The development kit is available in two versions.
| SD Card Slot Version (OM2S-DK-SD) | eMMC Storage Version (OM2S-DK-EM) |
|---|---|
| 8 GB Micro SD Card | Built-in 8GB eMMC |
| Two (2) Omega2S modules | Two (2) Omega2S modules |
| Two (2) Omega2S+ modules | Two (2) Omega2S+ modules |
| 2 dBi uFL Tape Antenna | 2 dBi uFL Tape Antenna |
| Micro USB Cable | Micro USB Cable |
| Ethernet Cable | Ethernet Cable |
Hardware
At the Omega2S’ core is the MT7688 SoC. It 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 3.3Vdc.
Onion built the Omega2S to interact with other hardware. It has a wide variety of hardware interfaces, and you can use up to 42 pins as user-controllable GPIOs.
Omega2S supports the following hardware-based serial communication protocols:
- I2C bus
- 3 UARTs
- 4 PWM channels
Omega2S has dedicated pins for:
- USB 2.0
- Ethernet
- SPI
Pins
Please refer to the following articles to learn more about Omega2S' GPIO's, multiplexing GPIO functionality, as well as the behavior and requirements of Special pins.
WiFi Antenna
The Omgea2S supports 2.4 GHz IEEE 802.11 b/g/n WiFi with a maximum 150 Mbps PHY rate.
There is no built-in antenna on the module. An antenna can be connected to the Antenna (ANT) pin or the u.FL connector.
For more information on the WiFi antenna, please see the Antenna and uFL connector article.
Mechanical Drawing
The following is a detailed diagram of the dimensions and geometry of the Omega2S and Omega2S+ modules.