ESP-M4 Wireless WiFi Module ESP8285 Serial To Wifi Compatible With ESP8266 Industrial Grade For Smart Plug FCC/CE Certification

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Item specifics

Product Type:
Curling Iron Parts
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  • The core processor of the ESP-M4 module uses the cost-effective chip ESP8285. The chip integrates an enhanced version of Tensilica's L106 Diamond Series 32-bit core processor in a smaller package with on-chip SRAM. The ESP8285 has a full Wi-Fi network function, which can be used independently or as a slave to other host MCUs. When the ESP8285 hosts an application, it can be launched directly from external Flash. The built-in cache helps improve system performance and optimizes the storage system. In addition, the ESP8285 can be used as a Wi-Fi adapter via the SPI/SDIO interface or I2C/UART port for any microcontroller-based design.
  • The ESP-M4 module supports the standard IEEE 802.11 b/g/n/e/i protocol and the complete TCP/IP protocol stack. Users can use this module to add networking capabilities to existing devices or to build separate network controllers.
  • The ESP-M4 module provides maximum practicality at low cost, providing unlimited possibilities for Wi-Fi functionality to be embedded in other systems.


ESP-M4 wifi module parameters:

  • Model: ESP-M4
  • Standard certification: FCC / CE / ROSH
  • Wireless standard: 802.11 b / g / n / e / i
  • Frequency range: 2.4G ~ 2.5G (2400M ~ 2483.5M)
  • Working voltage: 2.5V ~ 3.6V
  • Working current: average current: 80 mA
  • Working temperature: -40 ℃ ~ 125 ℃
  • Antenna: PCB onboard antenna
  • CPU: Tensilica L106 32 bit microcontroller



WI-FI parameters:

  • Frequency range: 2.4G-2.5G (2400MHz~2483.5MHz)
  • Transmit power: 802.11b: +20 dBm, 802.11g: +17 dBm, 802.11n: +14 dBm
  • Receive sensitivity: 802.11b: -91 dbm (11Mbps), 802.11g: -75dbm (54Mbps), 802.11n: -72dbm (MCS7)
  • Antenna: PCB onboard antenna

Hardware parameters:

  • CPU: Tensilica L106 32-bit microcontroller
  • Peripherals: UART / SDIO / SPI / I2C / I2S / IR Remote Control; GPIO / ADC / PWM / SPI/12C/12S
  • Working voltage: 2.5V~3.6V
  • Working current: average current: 80 mA
  • Working temperature: -40 ° C ~ +125 ° C
  • Ambient temperature: -40 ° C ~ +125 ° C
  • Packing size: 16*24*3mm

Software parameters:

  • Wi-Fi mode: Station / SoftAP / SoftAP + Station
  • Security mechanism: WPA / WPA2
  • Encryption type: WEP / TKIP / AES
  • Upgrade firmware: UART download / OTA (via network)
  • Software development: Non-RTOS/RTOS/Arduino IDE, etc.
  • Network protocol: IPv4, TCP / UDP / HTTP / FTP / MQTT
  • User Configuration: AT + Instruction Set / Cloud Server / Android / iOS APP



Shipping list:

  • 10pcs ESP-M4 wifi module


  • The module supply voltage is 3.3V DC and the current is 500mA or more;
  • Wi-Fi module IO maximum output current is 12mA;
  • Wi-Fi module NRST pin is active low; EN enable pin is active high;
  • The Wi-Fi module enters the upgrade mode: GPIO0 is at a low level, then the module is reset and powered on; the Wi-Fi module enters the normal working mode: GPIO0 is at a high level, and the module is reset and powered.
  • The RXD of the Wi-Fi module is connected to the TXD of the external MCU, and the TXD of the Wi-Fi module is connected to the RXD of the external MCU.
  • More documents can be downloaded at






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