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Product Features:

  • Serial to WIFI,serial to Ethernet, Ethernet to WIFI, multi functional module,serial sever module,make your serial device easier to access to the network,full transparent two-way data transmission, ensure maximum limit usability and compatibility.
  • Module is integrated 10/100M adaptive Ethernet interface, serial communication baud rate up to 230.4Kbps.
  • With the world's top network chip suppliers Ralink program ,raw materials are used the TDK / / Murata big manufacturers to lay a stable and reliable basis.
  • Reliable system core, applies for safety and long-running system
  • Dimension:40*29mm(smaller than 0ne-third of credit card)
  • Operating temperature: -25~75°C. caizhixing electronic co.,ltd
  • Built-in 360M MIPS CPU, 16M RAM and 4M FLASH and wireless baseband and RF front-end, and a variety of peripheral bus.
  • Have CE and FCC certification,support IEEE 802.11 b/g/n,support transparent transmission mode.
  • Support the vast majority of WIFI encryption methods and algorithms, WEP/WAP-PSK/WAP2-PSK/WAPI,encipher type: WEP64/WEP128/TKIP/AES
  • Provide AT + instruction set configuration, providing friendly Web configuration page, configured through the Web.
  • Support built-in onboard antenna and external antenna.
  • Support wireless AP mode and Station mode, the real hardware AP,support all the WIFI connection of iphone and android system and so on ,support AP and station online at the same time.
  • Optional TCP Server/TCP Client/UDP work mode, support lots of Network protocol: TCP/UDP/ARP/ICMP/HTTP/DNS/DHCP.
  • Support DHCP to automatically obtain IP, support the device to assign IP when the module works in AP mode.
  • Serial rate is adjustable, the maximum one is up to 230400.
  • Strong technical support, provide customized needs.
  • Status indicator Status indicator caizhixing electronic co.,ltd
  • Environmental standard Operating temperature:-20-70 Centigrade
  • Operating humidity:10%-90%RH(noncondensing)
  • Storage temperature:-40-80 Centigrade
  • Storage humidity:5%-90%RH(noncondensing)
  • Additional properties Frequency bandwidth optional:20MHz,40MHz,Automatic

Product Specifications:

  • Mechanical Dimensions
  • HLK-RM04 Mechanical Dimensions(mm) is shown in the following picture:
  • -- Features: Full function of wireless router:
  • -- Support 5 types of work mode: AP, Client, Repeater, Bridge, Router
  • -- AP mode- Default work mode. In this mode, the device works as a wireless access point, support for plug-and-play, and no configuration needed.
  • -- Router mode-In this mode, the device is equivalent to a wireless router, wired interfaces can be used as WAN, wireless used as LAN. Multiple wireless clients can share a broadband line to search the Internet.
  • -- Repeater mode -Use the radio relay function of the device, achieve the radio signal repeat and amplified, and form a new radio coverage area, ultimately attain the purpose of extending the coverage of the wireless network.
  • -- Bridge mode-With the Bridging function of equipment, firstly, the module RM04 establish a wireless connection with the front-end wireless network itself ,then sending the wireless signal, at the same time, form a new wireless coverage, signal weak and signal blind spot can be solved effectively.
  • -- Client mode -The AP to work in this mode for the main AP is a wireless client, the equivalent of a wireless network card.
  • Note: Serial to network parameter configuration
  • Open the brower:,access to the configuration page,configurate the parameters through web according to your needs.

Package Contents:

  • 1 x WIFI Module HLK-RM04 RM04
  • 1 x Base Board

Available Shipping Method Tracking NO. Estimated Delivery


1) Estimated delivery time includes processing time and actual shipping time. Normally our processing will take 1-2 working days.

2) Estimated Delivery Time shown above is only for reference, since actual delivery time depends on shipping service selected, delivery schedule and local customs clearance time, especially during peak periods.

3) Shipping Costs shown include fuel surcharges and may change a bit due to the fluctuation of currency exchange rates.

4) For the order with only one item (only one item):

a. if your item is less than 20USD and need registered freight, you need to pay certain upgrading fee.
b. if your item is more than 20USD, our system will ship your item with tracking number automatically free of charge.

5) For the order with multiple items (multiple items):

a. if most items' price is more than 20USD in one order, we will send the parcel with tracking number for free.
b. if most items in one order is low value with reasonable weight and size, our Checkout process is able to identify such order giving free registered freight on it.
c. if most items in one order are low value but with relatively high weight (i.e. Value: Weight ratio is not in reasonable range), we will charge certain discounted upgrading fee if you need tracking number.

Custom Tax

A. Import duties, taxes and charges are not included in the item price or shipping charges. These charges are the buyer's responsibility.

B. Please check with your country's customs office to determine what these additional costs will be prior to buying.

Return Policy

All the cell phones you bought from come with 6-month warranty and all the items we offer have a 3-month warranty. See additional details, please refer to our Shipping & Returns or our FAQ Return Policy.

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