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SM81 SOM
WiFi 6/6E IEEE 802.11ax 2.4/5GHz 2x2 Dual-Band Dual Concurrent SOM (System On Module)
- WiFi 6/6E IEEE 802.11a/b/g/n/ac/ax 2.4/5GHz dual-band dual concurrent applications
- Supports MIMO 2x2 (2.4GHz) and 3x3 (5GHz) WiFi operations
- Supports WiFi PHY rate of 573.5Mbps for 2.4Ghz (40MHz) and 3,603Mbps for 5GHz (160MHz)
- SoC: MTK Filogic830 MT7981BA Dual Core A53 1.3Hz CPU
- RF IC: MT7976CN, 802.11ax WiFi 6 2.4/5GHz 2x2 radios
- Memory: 2MB NOR (boot loader) + 16GB EMMC + 1GB DDR4 (optional NOR + NAND + DDR support (EMMC and NAND flash share same SPI interface)
- Ethernet Interface : 1 x HSGMII + 1 x GbE PHY
- Interfaces: USB3, SPI,UART, I2C, GPIO
- Debian v11.8 and OpenWRT 23.05 OS supported
- Connector: Solder down stamp
- Dimension: 36 x 50 mm
WiFi 6/6E
SOM
The SM81 is an IEEE 802.11ax compliant radio module with Mediatek MT7981BA SoC based solder down stamp SOM (System on Module). It can deliver up to 24dBm (2 streams) high output power, but still keep a very compact dimension of 50mm (Length) x 36mm (Width) x 3mm (Hight), making it a perfect WiFi solution for IOT (Internet Of Things) applications.
The SM81 provides multiple interfaces including USB2.0 x 1, SPI, I2C, HSGMII x 1, GbE PHY x 1, GPIOs, UART and etc. The SOM supports flexible memory combination, makes it easy to support various types of applications, including WiFi AP/Router, IOT, SDWAN, VPN and etc.
The SM81 provides multiple interfaces including USB2.0 x 1, SPI, I2C, HSGMII x 1, GbE PHY x 1, GPIOs, UART and etc. The SOM supports flexible memory combination, makes it easy to support various types of applications, including WiFi AP/Router, IOT, SDWAN, VPN and etc.
Specifications
- Module
- WiFi 6 802.11ax 2.4GHz 2X2 40MHz+ 5GHz 3x3 160MHz radio module
- WLAN Standatd
- IEEE 802.11 a/b/g/n/ac/ax
- SoC/CPU
- Mediatak MT7981BA Dual ARM A53 1.3GHz SoC
- Memory
- NOR: 2MB, for boot loader (this is mandatory)
EMMC: 16GB
DDR4: Max. 1GB, 2133Mbps, (512Mb x 16bits)
* NAND locations is reserved but not populated
- Radio Mode
- MIMO 2.4GHz 2x2 + 5GHz 3x3
- Radio Frequency Band
- 2412MHz ~2472MHz, 5180MHz ~5825MHz
- Transmit Power
- 2.4GHz: Max. 21dBm/MCS0
5GHz: Max. 21dBm/MCS0
- Receive Sensitivity
- Varying between -96 and -52dBm depending on modulation
- Channel Size
- 20/40/80/160MHz
- Modulation
- BPSK, QPSK, 64/256/1024QAM
- Data Rates
- 2.4GHz
802.11b: 1, 2, 5.5, 11Mbps
802.11g: 6, 9, 12, 18, 24, 36, 48, 54Mbps
802.11n: up to 300Mbps-2x2 MIMO
802.11ax: up to 573.5Mbps – 2x2 MIMO
5GHz
802.11g: 6, 9, 12, 18, 24, 36, 48, 54Mbps
802.11n: up to 450Mbps – 3x3 MIMO (40MHz channel)
802.11ac: up to 1300Mbps – 3x3 MIMO (80MHz channel)
802.11ax: up to 3,603Mbps – 3x3 MIMO (160MHz channel)
- Security
- AES-CCMP, GCMP hardware processing
- Power Consumption
- Typical 8W, Max. 11W with full Tx
- Temperature
- Operating Temperature: -10°C ~ +70°C
Storage Temperature: -40°C ~ +90°C
- Humidify
- Operating Humidify: 5%-95% (Non-condensing)
- Dimension
- 50 (L) x 36 (W) x 3.0 (H) mm
- Weight
- 20g (Preliminary)
- Antenna
- 3 x Ipex connectors
- Power Supply
- +3.3V
- Interfaces
- 1 x PCIE2.0 (only available with MT7981A)
1 x GBE PHY
1 x HSGMII/SGMII+
1 x USB2.0 Host
2 x UART (1 x 2-pin + 1 x 4-pins)
1 x hardware watchdog
1 x system reset
1 x WPS
Shared GPIOs
- Software
- OpenWRT 23.05 support with Linux kernel v5.15; or
Debian 11.8 Bullseye with Linux kernel v5.15
