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3181M-S RF Circuit 2.4g WIFI Modules SPI UART With SDIO2.0 Interfaces

3181M-S RF Circuit 2.4g WIFI Modules SPI UART With SDIO2.0 Interfaces

  • High Light

    RF Circuit 2.4g WIFI Modules


    SDIO2.0 2.4g WIFI Modules


    UART Wireless Lan Module

  • Chipset
  • Supply Voltage
  • Frequency
    2.4 GHz
  • Interface
  • Dimension
    L X W X H: 14 X 12.5 X1.8 (typical) Mm
  • Weight
  • Product Description
    Support Wi-Fi Functionality
  • Ambient Temperature
    -40°C To 85°C
  • Storage Temperature
    -40°C To 85°C
  • RoHS
    All Hardware Components Are Fully Compliant With EU RoHS Directive
  • Place of Origin
  • Brand Name
  • Certification
  • Model Number
  • Minimum Order Quantity
  • Price
    USD 1.3-3.1/pcs
  • Packaging Details
  • Delivery Time
    15-40 workdays
  • Payment Terms
  • Supply Ability

3181M-S RF Circuit 2.4g WIFI Modules SPI UART With SDIO2.0 Interfaces

IEEE 802.11b/g/n 3181M-S 2.4g WIFI Modules With SDIO2.0 Interfaces



3181M-S is a highly integrated 2.4 GHz Wi-Fi module that support the IEEE 802.11b/g/n baseband and RF circuit. It supports 20 MHz standard bandwidth and 5 MHz/10 MHz narrow bandwidth, and provides a physical layer rate up to 72.2 Mbit/s. Wi-Fi baseband supports the orthogonal frequency division multiplexing (OFDM) technology and is backward compatible with the direct sequence spread spectrum (DSSS) and complementary code keying (CCK) technologies, offering various data rates defined in the IEEE 802.11 b/g/n protocol.

Module chipset including the SPI, UART, I2C, PWM, GPIO, and multi-channel ADC. In addition, it provides high-speed SDIO2.0 slave interfaces, with clock frequency up to 50 MHz.


Operate at ISM frequency bands (2.4GHz)

Maximum rate of 72.2 Mbit/s@HT20 MCS7

SDIO interface for Wi-Fi

High transmitting power
High receiving sensitivity
PHY supporting IEEE 802.11b/g/n
MAC supporting IEEE802.11 d/e/h/i/k/v/w
WFA WPA, WFA WPA2 personal, and WPS2.0 for Wi-Fi


General Specification

Model Name


Product Description

Support Wi-Fi functionality


L x W x H: 14 x 12.5 x1.8 (typical) mm

Wi-Fi Interface

Support SDIO

Ambient temperature

-40°C to 85°C

Storage temperature

-40°C to 85°C


All hardware components are fully compliant with EU RoHS directive


Respect of the customer,please contact the sales staff before purchasing module to carry out pre-sale consultation,tel:+8618280383459.Otherwise,the module may not meet your needs or modules have no inventory.
Detailed specifications docs,please download from the official website or sales.