MXCHIP EMW3165 is an $8 CE/FCC Certified WiFi Module with an STM32F4 Cortex M4 MCU

A few months ago, Seeed Studio started selling MXCHIP EMW3162 Wi-Fi module with a STM32F2 Cortex M3 MCU clocked at 120Mhz for $9.95. It’s more capable than ESP8266 modules but also around 3 times more expensive. The company has now launched another WiFi module called MXCHIP EMW3165 with an STM32F4 Cortex M4 MCU @ 100 MHz, FCC certification, and listed for $7.95.
EMW3165EMW3165 module specifications:

  • MCU – STMicro STM32F411CE ARM Cortex M4 micro-controller @ 100 MHz with 512KB flash, 128KB RAM, DSP, and FPU
  • Storage – 2MB SPI flash
  • Wi-Fi connectivity
    • 802.11b, 802.11g, 802.11n (single stream)
    • WEP, WPA/WPA2 PSK/Enterprise
    • 16.5dBm@11b; 14.5dBm@11g; 13.5dBm@11n
    • Receiver Sensitivity – 87 dBm
    • Station, Soft AP and Wi-Fi direct
    • Support EasyLink
    • On-board PCB antenna (EMW3165-P model) or IPEX connector for external antenna (EMW3165-E model)
    • CE & FCC compliant
  • Peripherals:
    • 22 GPIOs
    • USART, I2C
    • ADC, DAC
    • Timer/PWM
    • JTAG/SWD debug interface
  • Connectors – 1×20 + 1x 21 half-through holes on both sides of the module (1mm pitch)
  • Dimensions – 32 x 16 mm
  • Operating voltage – 3.0V~3.3V
  • Operating Temperature – -30°C to +85°C

EMW3165_Block_DiagramMore details can be found in the datasheet.The main difference with EMW3162 module is the STM32F4 processor replacing STM32F2 processor, 2MB on-board flash (EMW3162 used 1MB on-chip flash only), and a smaller footprint. EMW3165 also appear to lack SPI and I2S found on EMW3162.

I could not find information about the software development tools, but it’s likely you can use the same tools as for EMW3162 namely Broadcom WICED firmware development kit, or MXCHIP MICO (Mico-controller based Internet Connectivity Operation System).

EMWE-3165 Development Board

EMWE-3165 is the baseboard for EMW3165 module with an NFC antenna, JTAG, USB, DB9 interface (serial), buttons, as well as supports for battery. It sells for $21.95 on Seeed Studio.

You can also find some more details on MXCHIP EMW3165 Download page.

Via HackADay. Thanks to Lalith for the tip!

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