Meeky Store
7 min readJul 1, 2022

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Free shipping Serial Uart to wifi dual ethernet dual RS232 WiFi module with external antenna Start kit HLK-RM04

  • Brand Name: bibikoo
  • Bundle: KIT
  • Camera Equipped: No
  • Model Number: HLK-RM04
  • State of Assembly: Almost Ready
  • Compatibility: All Compatible
  • Working Voltage: 5V(350mA)
  • Function: Serial/Uart to WiFi, Ethernet to wifi
  • Module Type: With external antenna
  • Function2: RS232 RS485/Dual RS232
  • Item type: Start kit
  • Ethernet port: Two RJ45/Dual Ethernet ports
  • RAM: 16M
  • Flash: 4M
  • Power supply: 5V 1A

Serial/Uart to WiFi Ethernet to WiFi dual ethernet dual RS232 WiFi module startkit with 2DB antenna

Packing list:
one HLK-RM04 Module
one HLK-RM04 Test Board
one 5v 1A power supply (EU or US Standards)
one 2DB antenna

Note:The verson of this module has add shielded cap on it to enhance the cooling function

Introduction:

Serial port: two RS232, one RS232 female head( with 9 holes)

Ethernet port: two RJ45 ports

RM04 wifi module: TTL 3.3V

Power supply:5V(1A)

HLK-RM04 is a new low-cost embedded UART-ETH-WIFI module (serial port — Ethernet — Wireless network) developed by Shenzhen Hi-Link ElectronicTechnology 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 users serial devices to transfer data via Ethernet.

1.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.

2. Module is integrated 10/100M adaptive Ethernet interface, serial communication baud rate up to 230.4Kbps.

3. 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.

4. Reliable system core, applies for safety and long-running system

5.Dimension:40*29mm(smaller than 0ne-third of credit card)

6. Operating temperature: -25~75degree.

7. Built-in 360M MIPS CPU, 16M RAM and 4M FLASH and wireless baseband and RF front-end, and a variety of peripheral bus.

8.Have CE and FCC certification,support IEEE 802.11 b/g/n,support transparent transmission mode.

9. Support the vast majority of WIFI encryption methods and algorithms, WEP/WAP-PSK/WAP2-PSK/WAPI,encipher type: WEP64/WEP128/TKIP/AES

10. Provide AT + instruction set configuration, providing friendly Web configuration page, configured through the Web.

11. Support built-in onboard antenna and external antenna.

12.Support wireless AP mode and Station mode, the real hardware AP,support all the WIFI connection of iphone andandroid system and so on ,support AP and station online at the same time.

13. Optional TCP Server/TCP Client/UDP work mode, support lots of Network protocol: TCP/UDP/ARP/ICMP/HTTP/DNS/DHCP.

14. Support DHCP to automatically obtain IP, support the device to assign IP when the module works in AP mode.

15.Serial rate is adjustable, the maximum one is up to 230400.

16. Strong technical support, provide customized needs.

Other Parameters

Status indicator Status indicator

Environmental standard Operating temperature:-20–70 degree

Operating humidity:10–90 percent RH(noncondensing)

Storage temperature:-40–80 Centigrade

Storage humidity:5–90 percent RH(noncondensing)

Additional properties Frequency bandwidth optional:20MHz,40MHz,Automatic

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.

Technical Specifications

Table2–1Technical Specifications

Mechanical Dimensions

HLK-RM04 Mechanical Dimensions is shown in the following picture

Contact Pin Interface

The Pin of this product as shown above is defined as follows

Promised by Seller

Payment:

1. All major credit cards are accepted through secure payment processor ESCROW..

2. Please check the additional cost with your customs prior to buying.

3. We will declare the custom invoice with lower value in order to save the money for you.

4.Please indicate your requirement, such as payment, shipment, packaging requirement , value of declaration etc. And please leave your email address to us for urgent contact.

5. Our price does not include taxes, VAT, or other hidden charges.

International Shipping:

1. WORLDWIDE SHIPPING. (Except some countries and APO/FPO)

2. We only ship to confirmed order addresses. Your order address MUST MATCH your Shipping address.

3. SERVICE TRANSIT TIME is provided by the carrier and excludes weekends and holidays. Transit times may vary, particularly during the holiday season.

4.If you have not received your shipment within 30 days after payment, please contact us. We will track the shipment and get back to you as soon as possible.

5. Shipping time:

1) By HK/china post air parcel : Generally, about 20–30 days (Brazil need 30–40 days)

By Express: Generally, about 5–10 working days

2) Most of the countries within 10 to 20 business days. Except West Europe, Africa. (15–30days)

Feedback:

1) Your Feedback is really important to us, please take a few seconds to leave great feedback if you are satisfied with our product or service, thank you so much!!

2) We always offer the best goods and service to you.

3) Please contact us before leaving neutral (3 stars) or negative (1–2 stars) feedback. We will try our best to solve the problem and leave you a happy shopping mood here. Thank you!

Return:

1. Refund or replacement request is available only the requests within 1 week after item received & returning the item as the same condition as received.

2. Please contact us to request a return authorization. Your name, auction number, and reason for return should be included in the email. The items returned must contain all original packaging materials.

3. Please repack the item carefully. Items returned will be tested to ensure the defective and then a new replacement will be shipped to you immediately. In the event that a suitable replacement is not available then a refund will be issued. Shipping, handling and insurance fees are non refundable.

4. If the item is found non-defective, the item will be sent back to the buyer at buyers expense. Items returned without RMA number will be refused and returned to the sender. Buyer is responsible for All Return Postage and Shipping Charges. Buyer is responsible for additional shipping costs for items that are returned refused and/or undeliverable. We do not accept any returns without an authorization number on the box or label it is being returned in.

About US:

1. We provide technical support and user manual for customers, if you need, please contact us through Meeky Store mail, we will send the software to you by e-mail, some of the software is large, so please leave your available mail to receive them.

2. We are care about our customer. We guarantee 100% customer satisfaction. If your item is not as described or faulty when you receive it we will replace it for you with no additional charge.

3. We guarantee that our products are brand new, official and first-class quality.

4. Please contact us with any comments, questions or suggestions that you may have, we will be happy to assist you.

5. For quality control we do personally inspect for each item before shipment. All items are 100% new and inspected.

6. We hope to develop a strong, long-term, mutually beneficial relationship with you.

7. If you are a seller, we can help you send the products to your customer directly. (Please contact first, thank you)

8. If you are interesting in our products, please send us your order soon.

Packaging Details

Unit Type:

lot (1 pieces/lot)

Package Weight:

0.300kg

Package Size:

10cm x 8cm x 6cm (3.94in x 3.15in x 2.36in)

432

Our company

To order this product, please go to meekystore.com or use this link {link}

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