We have been deeply involved in the industry for more than ten years, and have served more than 10W+ customers. WiFi modules, Bluetooth modules, power modules and other products are in more than 80 countries and regions, providing customers with professional and reliable IoT module products.
Serial port to WIFI module-two-way transparent transmission
HLK-M51 is a cost-effective embedded serial port to WiFi module. Embedded module based on universal serial interface and in line with network standards, built-in TCP/IP protocol stack, can realize the conversion between user serial port and wireless network (WiFi), and transparently transmit data between serial port and network TCP/UDP connection.
Functional structure diagram
*Esc/Def key description:
1. Short press: Exit transparent transmission mode and switch to AT command mode;
2. Long press: restore default settings
*Bottom plate size: 87.2×50.4×14mm (with DB9 serial port) Single board: 80×50.4×4.5mm
Product HLK-M51 supports serial port to WiFi STA, serial port to WiFi AP mode
·In this mode (STA mode), through settings, the data of COM1 and WiFi can be converted mutually.
·WiFi security supports the current mainstream encryption methods.
·In this mode (AP mode), through settings, the data of COM1 and WiFi can be converted mutually.
·The WiFi device can connect to the product and become a device under the WiFi LAN.
·WiFi security supports the current mainstream encryption methods.
Network parameters | |
Network Standard | Wireless standard: IEEE 802.11n/g/b |
wireless transmission | 11n: 150Mbps (MAX) 11g: 54Mbps (MAX) 11b: 11Mbps (MAX) |
Number of channels | 1-11 |
Frequency range | 2.4-2.4835GHz |
transmission power | 15-20dBm |
Function parameters | |
WiFi working mode | STA/AP |
WDS function | WDS function |
wireless security | 64/128/152 bit WEP encryption WEP, WPA, WPA2 (CCMP, TKIP) security mechanism (only WPA2-CCMP is supported in AP mode) |
Configuration method | Serial AT command |
Serial port to network | |
Network connection method | TCP Server/TCP Client/ UDP Server/ UDP Client |
TCP Server | Maximum number of connections: 5 |
Serial port baud rate | 1200~3000000bps |
hardware parameters | |
Core chip | Ziguang RDA5981 |
Interface type | UART×2/I2S×2/I2C×1/PWM×8 /SPI×4/SDMMC×1/USB2 .0×1 |
Memory/Flash | 96K Bytes(SRAM32K Bytes)/built-in 8Mbit Flash |
Working voltage | 3.3V |
Working current | average 60mA, peak 100mA |
Other parameters | |
Appearance size | 16.5×14.1×1.6mm |
Environmental standards | Working temperature: -20-70℃ Working humidity: 10%-90%RH (non-condensing) Storage temperature: -40-80℃ Storage humidity: 5%-90%RH (non-condensing) |
Other performance | Band bandwidth optional: 20MHz/40MHz, automatic |
Memory/Flash | 96K Bytes(SRAM32K Bytes)/built-in 8Mbit Flash |
Official mall
Taobao shop
Wuhan Hi-Link Electronic Co.,Ltd.
Follow WeChat subscription account
Contact number：027-87265699 Copyright：Wuhan Hi-Link Electronic Co.,Ltd. Technical Support：Gicisky
