HLK-RM04 is a new low-cost embedded UART-ETH-WIFI module (serial port - Ethernet - Wireless network) developed by Shenzhen Hi-Link Electronic co., Ltd
This product is an embedded module based on the universal serial interface network standard, built-in TCP / IP protocol stack, enabling the user serial port, Ethernet, wireless network (wifi) interface between the conversions.
Through the HLK-RM04 module, the traditional serial devices do not need to change any configuration; data can be transmitted through the Internet network. Provide a quick solution for the user’s serial devices to transfer data via Ethernet.
Picture1.F-structure
1 Summarize
1.1 Technical Specifications
Table2-1Technical Specifications
|
Network standard
|
wireless：IEEE 802.11n、IEEE 802.11g、IEEE 802.11b
|
|
wired：IEEE 802.3、IEEE 802.3u
|
|
Wireless transmission rate
|
11n: maximum up to 150Mbps
11g: maximum up to 54Mbps
11b: maximum up to 11Mbps
|
|
Tracks number
|
1-14
|
|
Frequency range
|
2.4-2.4835G
|
|
Emission power
|
12-15DBM
|
|
Interface
|
one 10/100Mbps LAN/WAN multiplex interface
|
|
Antenna
|
|
Antenna type
|
Onboard antenna / External Antenna
|
|
Functional Parameters
|
|
WIFI work mode
|
Client/AP/Router
|
|
WDS Function
|
Support WDS wireless bridge connection
|
|
Wireless security
|
Wireless MAC address filtering
|
| Wireless security function switch |
|
64/128/152 bit WEP encryption
|
|
WPA-PSK/WPA2-PSK、WPA/WPA2 security mechanism
|
|
Network management
|
Remote Web management
|
| Configuration file import and export |
|
WEB software upgrade
|
|
Serial to Network
|
|
Maximum transmission rate
|
500000bps
|
|
TCP connection
|
Max connection number>20
|
|
UDP connection
|
Max connection number>20
|
|
Serial baud rate
|
50~230400bps
|
|
Other Parameters
|
|
Status indicator
|
Status indicator
|
|
Environmental standard
|
Operating temperature：-20-70℃
|
|
Operating humidity：10%-90%RH（No condensation）
|
|
Storage temperature：-40-80℃
|
|
Storage humidity：5%-90%RH（No condensation）
|
|
Additional properties
|
Frequency bandwidth optional：20MHz、40MHz，automatic
|
1.2 Hardware Explanation
1.2.1 Mechanical Dimensions
HLK-RM04 Mechanical Dimensions is shown in the following picture：
1.2.1.1 Contact Pin Interface
The Pin of this product as shown above is defined as follows：
Table2-2 module pin interface
|
No.
|
Function
|
Direction
|
Explanation
|
| 1 |
VDD5V |
A
|
5 Power input |
| 2 |
GND |
GND
|
Power ground |
| 3 |
WLAN_LED |
O
|
WIFI LED |
| 4 |
3.3V |
I
|
3.3V power output |
| 5 |
LINK1 |
I/O
|
Net gape 1 LED indicte |
| 6 |
USB_P |
|
USB signal D- |
| 7 |
USB_M |
|
USB signal D+ |
| 8 |
I2S_SD |
|
I2C DATA/GPIO |
| 9 |
I2S_CLK |
|
I2C CLK/GPIO |
| 10 |
GIOP0 |
I/O
|
Universal GPIO |
| 11 |
TXOP1 |
I/O
|
Net gape 1 TX-P |
| 12 |
TXON1 |
I/O
|
Net gape 1 TX-N |
| 13 |
RXIP2 |
I/O
|
Net gape 2 RX-P |
| 14 |
RXIN2 |
I/O
|
Net gape 2 RX-N |
| 15 |
RXIN1 |
I/O
|
Net gape 1 RX-P |
| 16 |
RXIP1 |
I/O
|
Net gape 1 RX-P |
| 17 |
TXON2 |
I/O
|
Net gape 2 TX-N |
| 18 |
TXOP2 |
I/O
|
Net gape 2 TX-P |
| 19 |
RTS_N |
I
|
All function serial RTS |
| 20 |
UART_RX |
I
|
Simple serial RX |
| 21 |
UART_TX |
O
|
Simple serial TX |
| 22 |
RXD |
I
|
All function serial RX |
| 23 |
LINK2 |
I/O
|
Net gape 2 LED I/O indicte |
| 24 |
CTS_N |
O
|
All function serial CTS |
| 25 |
RIN |
I
|
GPIO |
| 26 |
TXD |
O
|
All function serial TX |
| 27 |
1.8V |
Power Out
|
Net gape 1.8V output |
| 28 |
VDD5V |
Power In
|
5V input |
