HLK M30 new ultra low power serial port WIFI single chip WIFI MT7681 WIFI switch module

Suitable for water heaters Air purifier Solar inverter remote control mobile phone control Brand: Hi-Link Product Name: Hi-Link mt7681 Serial Wifi Module Remote Control Wireless AP Low Power HLK-M30 Product Code: 14183363600 Store: Hi-Link Official Flagship Store Product Gross Weight: 50.00g Item No.: 42964948686 Category: Other Accessories Category: Others

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The HLK-M30 module is officially released: This module is different from other manufacturers' original products. We have already completed the complete system and can directly test it.

Not only low prices, stability is reliable, the service can win.

Universal development test suite

Hailingke Electronics offers two evaluation development kits, HLK-M30, for customers to quickly familiarize themselves with products and deep application development. Users can use the RS-232 serial port debugging module of the computer to perform parameter configuration, module management and function testing.

The HLK-M30 is a new low-cost embedded UART-WIFI (serial-wireless network) module from Hailingke Electronics.

This product is an embedded module based on the universal serial interface and conforms to the network standard. It has built-in TCP/IP protocol stack, which can realize the conversion between user serial port and wireless network (WIFI).

With the HLK-M30 module, traditional serial devices can transfer their data over the Internet without changing any configuration. Provides a complete and fast solution for users' serial devices to transmit data over the network.

Advantages of this module

Ultra-small size, only 14mm × 16.5mm × 2.25mm

Low power WIFI module

Support 802.11 b/g/n protocol

Support WIFI encryption method WEP/WPA-PSK/WPA2-PSK/TKIP/AES, etc.

No need for any user driver, the user's microcontroller only needs to be used as a normal serial port.

Support AP (hotspot) / STA (WIFI node)

Support TCP Server/TCP Client/UDP Server/UDP Client working mode

Support DHCP DNS HTTP application layer protocol

Support serial AT command configuration

Support for search protocol lookup module in LAN

Support SmartLink intelligent networking function, connect to ordinary wireless router with APP control module

Passed CE/FCC certification, in line with ROHS standards

Module basic parameters:

Basic parameters

Wireless standard

IEEE 802.11n, IEEE 802.11g, IEEE 802.11b

Wireless transmission rate

11n: up to 150Mbps
11g: up to 54Mbps
11b: Up to 11Mbps

Number of channels


Frequency Range


Transmit power

14-18 DBM


Serial port, GPIO


Antenna type

External antenna

Transmission distance

100-300 meters (different environmental conditions, different transmission distances)

Function parameter

WIFI working mode

Wireless network card / wireless access point


wireless function

64/128/152 bit WEP encryption

WPA-PSK/WPA2-PSK, WPA/WPA2 mechanism

Serial to network

High transmission rate


TCP connection

Large connection number 4

UDP connection

Large connection number 4

Other parameters

Status Indicator

Status indication

Environmental standard

Working temperature: -20-70 °C

Working humidity: 10%-90% RH (non-condensing)

Storage temperature: -40-80 ° C

Storage humidity: 5%-90% RH (non-condensing)

Other performance

Band bandwidth optional: 20MHz, 40MHz, automatic

Main application areas

u handheld device

u remote control

u Consumer electronics

u Internet of Things applications

u Industrial control

u Portable wireless communication products

u equipment

u LED control

u Sensor networking application

Electrical characteristics

Electrical characteristics of the HLK-M30



Small value

Typical value

Large value


Storage temperature range



Large soldering temperature



Operating Voltage



Any I/O pin voltage


Electrostatic discharge (human body model)



Electrostatic discharge amount (charging device model)



 Mechanical Dimensions

U product physical map

Mobile phone configuration

Preparation: Install the software "IoTManager_v0.96" on your Android phone or PAD. Power on the HLK-M30 and press the Exit/Default button for 10 seconds to reset the module to the factory default settings.

2. Open IoTManager, enter the network name (SSID) and password of the wireless router to be connected, and then click the Start button. The module will automatically connect to the wireless router, and the WIFI_LED of the module will flash rapidly.

3, connect the computer to the wireless router, then open the search tool HLK-M30_Discover, click the Discover button, you can search all the WIFI modules of Hailing Branch in the current LAN. As shown below: HLK-M30 is searched, its assigned IP is

Searched for HLK-M30 module connected to router

The HLK-M30 module defaults to the Smart Config state. Once the module is powered up, you can use the IoTManager for one-click configuration to make it fast.

The following is a screenshot of some of the M30 data: If you need, you can directly ask the customer!

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