5V wifi relay switch with 16 channels digital control

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US $49.90 / Piece | 1 Piece (Min. Order)
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Shipping fee:
Depends on the order quantity.
Lead Time:
7 day(s) after payment received
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Quick Details
Place of Origin:
Guangdong, China (Mainland)
Brand Name:
Model Number:
Electromagnetic Relay
Protect Feature:
Contact Load:
Low Power
WiFi working mode:
AP, Client, Router
Baud rate:
1200~ 115200bps
RS232(DB9 Male)
Operating Temperature:
Maximum Power:
220V 10A
Wireless cloud/remote Control
Supply Voltage:
5V 2A

Packaging & Delivery

Selling Units:
Single item
Single package size: 
10X8X6 cm
Single gross weight:
0.5 kg
Package Type:
1.Standard exported package 2.Packing List: one HLK-WR02 server
Lead Time :


Cloud/Remote control TTL UART to wifi relay
*PC, Mobile, Computer source code
*Data interface:GPIO/Ethernet/SPI

  Notice: The item include one HLK-RM04-E module with p2p function, one 10cm flexible antenna, one 16 channels test board with one RS232 serial port two RJ45 ports, one 5V 2A power supply and one ethernet cable.

Product Description

HLK-SW16 specification:

1.Smart size:115*130*19mm

2.Low power wifi module

3.Support 802.11b/g/n protocol

4.Support wireless security WEP/WPA-PSK/WPA2-PSK/TKIP/AES

5.Need no driver, just use as the normal serial port for users' PC

6.Support AP/STA

7.Support TCP Server/TCP Client/UDP Server/UDP Client work mode






RS232(DB9 Male)

The range of baud rate: 1200~ 115200bps

single 5V power supply


support IEEE802.11b/g wireless


support the range of frequency: 2.412~2.484 GHz

support two types of wireless


Ad hoc and Infrastructure

support multiple security authenti- cation mechanisms:



support quick networking

support wireless roam


support multiple network protocols:


support two types of work modes:

auto and command

Support transparent transmission


support AT+ instruction set

support a variety of parameters configuration methods:

serial/WEB server/wireless conn- ection


intelligent bus network, such as wireless credit card machine

small financial payment network, such as wireless POS machine

industrial equipment networking, such as wireless sensor



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)



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)


Our Services

 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.




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.




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.


Company Information

  The main WiFi module is HLK-RM04 module.