Electronic scale wifi module with external antenna Startkit ,wireless Access/AP/ Bridge/router

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US $15.80 / Piece | 1 Piece (Min. Order)
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Depends on the order quantity.
Lead Time:
7 day(s) after payment received
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Quick Details
Model Number:
HLK-RM04 Startkit
Logic ICs
Brand Name:
Place of Origin:
China (Mainland)
Module size:
Power supply:
5V 1A
Serial Port:
Dual RJ45, DB9 serial port
Module Type:
With external antenna
Uart Ethernet WiFi transformation from each other
Operating Temperature:
Dissipation Power:
5V 150mA
Supply Voltage:
5V 1A

Packaging & Delivery

Items per Carton:
1 Pieces/
Package Measurements:
10X8X6 cm
Gross Weight:
0.5 kg
Package Type:
Standard exported package
Lead Time :


Widely used in set-top boxes,cameras, mobile power supply, industrial control wifi devices, wireless advertising machine, 3G .

Product Description

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

1 Introduction:

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

Ethernet port: two RJ45 port

RM04 wifi module: TTL 3.3V

Power supply:5V(1A)

The startkit include four parts: the test board, the RM-04 module, the power supply and the antenna.

 HLK-RM04 is a new low-cost embedded UART-ETH-WIFI module (serial port - Ethernet - Wireless network) developed by Shenzhen Hi-Link Electronic Technology 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.

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 frontend 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. 


2 Summarize


2.1Technical Specifications


Table2-1Technical Specifications 


HLK-RM04 Mechanical Dimensions is shown in the following picture

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





Packaging & Shipping


Packaging Details

Unit Type:

lot (1 pieces/lot)

Package Weight:

0.500kg (1.102lb.)

Package Size:

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




Our Services


Our technical staff will help to solve the technical questions, our sell staff will help to solve selling problems.

We will provide the user manual and configuration files to costomer, we also can provide the PCB circuit to customer.



Promised by Seller




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)



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!




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 Aliexpress 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.



Company Information

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