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Hi-Link

HLK-RM08K

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Flychip works with qualified channels including international chip manufacturers and well-known distributors. Our team focuses on supplier review, traceability, product condition and quality control.

HLK-RM08K is an MT7688AN-based WiFi and Ethernet module with OpenWrt support, ideal for serial networking, IoT gateways, remote monitoring, embedded routers, and industrial device connectivity.

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Part No.:: HLK-RM08K

Manufacturer:: Hi-Link

Category:: Modules

Package:: Embedded Module

Datasheet:: HLK-RM08K.pdf

Description:: HLK-RM08K is an MT7688AN-based WiFi and Ethernet module with OpenWrt support, ideal for serial networking, IoT gateways, remote monitoring, embedded routers, and industrial device connectivity.

Quantity:: RFQ Add To RFQ list

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Product Details

FLYCHIP Product Review

Hi-Link HLK-RM08K WiFi Router Module Procurement & Engineering Review

This engineering and procurement review helps designers, sourcing teams and production engineers evaluate the Hi-Link HLK-RM08K embedded UART-ETH-WIFI module for serial-to-network communication, industrial networking, IoT equipment, embedded gateways and connected device applications.

Brand Hi-Link

Model HLK-RM08K

Module Type UART / Ethernet / WiFi

Hi-Link HLK-RM08K Product Overview

The Hi-Link HLK-RM08K is an embedded communication module designed to provide conversion between UART serial communication, wired Ethernet and 2.4 GHz WiFi. It integrates a TCP/IP protocol stack so an embedded host can add network connectivity without implementing the complete Ethernet and wireless networking layer itself.

The module is based on the MT7688K platform and is particularly useful in equipment where an existing MCU, controller or serial device needs access to a local network or Internet-connected infrastructure. Its combination of multiple Ethernet interfaces, dual UART channels and WiFi makes it more flexible than a simple serial-to-WiFi converter.

HLK-RM08K can operate in several network architectures, including serial-to-Ethernet, serial-to-WiFi STA, WiFi AP, router and bridge configurations. This makes the module relevant to industrial control, smart equipment, instrumentation, remote monitoring, LED control systems, embedded gateways and other connected electronic products.

2.4GHz: WiFi operating frequency band

150Mbps: Maximum IEEE 802.11n wireless rate

1+4+2: 1 WAN, 4 LAN and 2 UART interfaces

Engineering perspective

HLK-RM08K is best viewed as a network communication subsystem rather than only a WiFi radio. Its value comes from combining UART conversion, Ethernet switching and wireless networking functions in one embedded module.

HLK-RM08K Key Specifications & Interface Review

Before placing the HLK-RM08K into a design or production BOM, engineers should evaluate the wireless standard, Ethernet architecture, serial interfaces, module version, antenna arrangement and mechanical requirements against the target system.

Manufacturer / Brand	Hi-Link / Shenzhen Hi-Link Electronic Co., Ltd.
Model	HLK-RM08K
Product Type	Embedded UART-ETH-WIFI communication and WiFi router module
Core Platform	MT7688K
Wireless Standards	IEEE 802.11b / 802.11g / 802.11n
Wired Network Standards	IEEE 802.3 / IEEE 802.3u
Wireless Frequency	2.4 GHz band
802.11n Data Rate	Up to 150 Mbps under supported operating conditions
Ethernet Interfaces	1 WAN + 4 LAN
Serial Interfaces	2 UART serial ports
Antenna Interface	External antenna connection / IPEX according to module configuration
Network Functions	STA, AP, Router, serial-to-Ethernet, serial-to-WiFi and bridge configurations
Protocol Capability	Integrated TCP/IP networking functions
Mechanical Options	Pin-header and surface-mount versions are listed by the manufacturer
Reference Module Size	Manufacturer product information lists approximately 40 × 29 × 3.2 mm; verify the mechanical drawing for the exact selected version

Wireless Interface

2.4 GHz IEEE 802.11b/g/n operation enables connection to common WiFi infrastructure used by embedded and industrial systems.

Ethernet Connectivity

Multiple Ethernet interfaces allow HLK-RM08K to support applications requiring more than a single network connection.

Dual UART

Two serial interfaces provide flexibility when connecting MCUs, controllers, instruments or legacy serial equipment.

Flexible Network Modes

AP, STA, router and bridge-related operating modes allow the same module to be used across several network architectures.

HLK-RM08K Engineering Verification & Network Modes

The most important engineering question is not simply whether the HLK-RM08K supports WiFi. Engineers should determine how the module will sit between the host controller, Ethernet infrastructure and wireless network.

Serial to Ethernet	Used when UART data from a host controller must be transferred through a wired Ethernet network. DHCP or static IP configuration can be selected according to the system architecture.
Serial to WiFi STA	The module connects as a WiFi station to an existing wireless access point, allowing serial equipment to communicate through the established WiFi network.
Serial to WiFi AP	HLK-RM08K operates as a wireless access point so phones, tablets, computers or embedded clients can connect directly to the module's local wireless network.
Router Operation	The module can combine wireless and Ethernet functions for router-style applications where WAN and LAN interfaces are required.
Bridge Operation	Wired or wireless bridge configurations can be used where devices connected through the module need to participate in an upstream network.

For production use, engineers should confirm the exact operating mode before PCB and firmware release. Ethernet-port behavior can change according to the selected mode, so WAN/LAN assumptions should not be made only from the number of physical interfaces.

Confirm whether the product requires WiFi STA, AP, router or bridge operation.
Determine whether the host application requires one or both UART channels.
Verify UART voltage levels, baud-rate requirements and host-controller compatibility.
Confirm whether DHCP or static IP addressing will be used during deployment.
Check WAN and LAN behavior in the selected networking mode.
Verify antenna type, IPEX connection, antenna cable and final enclosure location.
Review power input and peak-current requirements using the documentation for the exact hardware revision.
Check firmware and configuration compatibility before replacing an existing production batch.
Validate the final PCB footprint against the pin-header or surface-mount version being ordered.

Do not design from a distributor title alone

HLK-RM08K documentation has been released in multiple revisions over the product's lifetime. Electrical, mechanical and environmental values should therefore be checked against the current manufacturer drawing, user manual and the exact hardware version being purchased.

HLK-RM08K Applications & BOM Integration

HLK-RM08K is most useful when a project already contains an MCU, processor or serial controller and network connectivity needs to be added without developing a complete WiFi and Ethernet subsystem from the beginning.

Industrial Automation

Connect controllers, monitoring equipment and serial industrial devices to Ethernet or WiFi infrastructure.

Instruments & Meters

Provide network access for instruments or metering equipment originally designed around serial communication.

Smart Equipment

Use WiFi and Ethernet connectivity in smart appliances, control equipment and connected electronic devices.

Embedded Gateways

Combine UART, wired Ethernet and WiFi where a compact embedded network gateway is required.

A complete HLK-RM08K BOM may include significantly more than the communication module itself. Antenna components, power conversion, Ethernet magnetics or connectors, status indicators, protection components and host-side interface circuitry may all need to be considered.

1: Module Selection
Confirm HLK-RM08K variant, installation method and required production quantity.

2: Interface Review
Review UART, Ethernet, WiFi, antenna and power requirements against the host design.

3: Supporting BOM
Check connectors, protection parts, power devices, antenna accessories and related PCB materials.

4: Production Validation
Test networking, serial communication and configuration behavior before releasing the complete assembly for mass production.

HLK-RM08K Procurement & Replacement Risk

Unlike a simple passive component, an embedded communication module includes hardware, firmware and network configuration behavior. Consequently, procurement approval for HLK-RM08K should include both physical inspection and functional compatibility checks.

Hardware Revision

Confirm whether the supplied production lot matches the hardware revision already qualified in the customer's design.

Firmware Behavior

Configuration interfaces and network behavior should be checked when changing batch, firmware or module revision.

Mechanical Version

Distinguish between pin-header and surface-mount configurations before PCB assembly or replacement purchasing.

Antenna System

Do not approve a substitute without confirming RF interface, antenna connector and final installation requirements.

Important replacement warning

A module with similar WiFi specifications is not automatically a drop-in replacement for HLK-RM08K. Pin definition, PCB footprint, supply requirements, UART behavior, Ethernet architecture, antenna interface, firmware commands and network functions must all be checked before substitution.

HLK-RM08K Quality & Supply Chain Review

For prototype, NPI and production purchasing, FLYCHIP can evaluate HLK-RM08K from both component-sourcing and engineering-integration perspectives. The goal is to reduce the risk of receiving the wrong mechanical variant, unqualified source, incompatible revision or unsuitable production batch.

Model Confirmation	Confirm Hi-Link brand, HLK-RM08K model, mounting version and project-specific configuration requirements.
Supplier Review	Evaluate sourcing channel, supplier history, available batch information and delivery feasibility.
Appearance Inspection	Check shielding, PCB condition, pins or pads, antenna connector, marking and general manufacturing consistency.
Traceability	Review product labels, packaging, lot information and available supporting documentation where applicable.
Functional Validation	For project-critical supply, verify boot behavior, UART operation, Ethernet connectivity and required WiFi network modes.
Production Planning	Review quantity, lead time, future demand and change-control needs before transitioning from prototype to mass production.

HLK-RM08K PCB, SMT & PCBA Integration Support

The performance of HLK-RM08K in a finished product depends on more than the module itself. Power integrity, antenna positioning, grounding, Ethernet routing, mechanical clearance and production assembly can all affect the final system.

Component Supply

Support HLK-RM08K and related electronic component sourcing for prototype, NPI and production demand.

PCB Review

Coordinate PCB requirements around module footprint, antenna area, power routing and host interface connections.

SMT Assembly

Support assembly planning for the selected HLK-RM08K version and its associated PCB-level components.

PCBA Integration

Combine module sourcing, PCB manufacturing, assembly and project-level production coordination within one workflow.

Keep the antenna and RF region away from unnecessary shielding or conductive enclosure structures.
Provide stable power with adequate transient-current capability for wireless operation.
Check Ethernet routing and external interface circuitry against the reference design.
Verify UART voltage levels before connecting the host MCU or processor.
Confirm the exact module footprint before PCB fabrication.
Perform WiFi, Ethernet and serial communication tests on the assembled PCBA.

Recommended HLK-RM08K Purchase Decision Flow

A reliable purchase decision should start with system compatibility rather than price. Engineering approval should be completed before final procurement approval, particularly when HLK-RM08K is being introduced as a new design component or replacing another network communication module.

Application Definition UART / Ethernet / WiFi Check Hardware Version PCB & Antenna Review Sample Validation Supply Review Order Approval

1: Confirm Technical Fit
Verify network mode, UART requirements, Ethernet interfaces, WiFi architecture and antenna design.

2: Test a Representative Sample
Validate configuration, connection stability and communication behavior in the actual host system.

3: Confirm Production Version
Lock the required mounting style, hardware version and project-approved configuration.

4: Approve Procurement
Confirm price, quantity, supplier source, delivery requirements and quality expectations before mass-production purchasing.

HLK-RM08K Engineering & Procurement Notice

This HLK-RM08K product review is prepared for component sourcing, engineering evaluation, BOM planning and production procurement reference. Technical information should be checked against the latest documentation released by Hi-Link before design release or mass production.

Because communication modules may be supplied in different hardware, mechanical or firmware revisions, specifications such as power input, current consumption, operating temperature, RF output, mechanical dimensions and configuration behavior should be verified against the exact production version being purchased.

Manufacturer-listed wireless transmission rates represent supported PHY capabilities and should not be interpreted as guaranteed real-world application throughput. Actual wireless range and data performance depend on antenna design, RF environment, interference, enclosure structure, access-point configuration and system implementation.

FLYCHIP can support HLK-RM08K sourcing together with BOM procurement, PCB manufacturing, SMT assembly and PCBA project coordination. Final application suitability remains subject to customer engineering validation and the latest manufacturer documentation.

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Flychip has been providing electronic components to global customers for 20 years. We combine component supply, BOM services, PCB, SMT and PCBA support to help customers accelerate product development and delivery.

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Stable supply coordination for production preparation, batch delivery and long-term purchasing needs.

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HLK-RM08K Technical Information

Specifications
FAQ
Hot Sale
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Specifications

Product Attributes: Attribute Value

Manufacturer:: Hi-Link

Series:: RM08K Series

Package/Case:: Embedded Module

Packaging:: Module

Product Status:: Active

Protocol:: TCP/IP, TCP, UDP, DHCP, WDS

Function:: Serial to WiFi, Serial to Ethernet, WiFi Router, AP/STA

Interface:: 5 x Ethernet, 2 x UART, USB Host/Slave, GPIO

Standards:: IEEE 802.11b/g/n, IEEE 802.3, IEEE 802.3u

Voltage - Supply:: 5V DC ±0.2V

Current - Supply:: 120 ±50mA Typical, 550mA Peak

Operating Temperature:: -20°C to +70°C

Supplier Device Package:: Embedded WiFi Module

Grade:: Commercial / Industrial Application

Qualification:

FAQ

1. How to order HLK-RM08K on Flychip?

You can submit an RFQ directly on this page. Our sales team will review your quantity, delivery requirements and target price, then reply with a quotation as soon as possible.

2. How does Flychip verify the quality of HLK-RM08K?

We work with qualified channels including international chip manufacturers and well-known distributors. Our team pays close attention to supplier review, traceability, product condition and quality control.

3. Are the price and inventory of HLK-RM08K updated in real time?

Inventory and prices of electronic components may fluctuate frequently. The displayed data is for reference, and the final quotation will be confirmed by our sales team.

4. What payment methods are accepted?

Wire Transfer, PayPal, Alipay, WeChat, Credit Card, Western Union, MoneyGram and Escrow may be supported depending on the order and region.

5. How is shipping arranged?

We can arrange international shipping through DHL, UPS, FedEx, TNT and other logistics channels. Tracking information will be provided after shipment.

6. What is the return or replacement process for HLK-RM08K?

Please contact our sales team within the specified period if there are quantity differences, wrong items, or clear external defects. The product should remain unused and in its original packaging.

7. Can I request technical support for HLK-RM08K?

Yes. You can contact us for datasheet, package details, pin information and sourcing assistance related to HLK-RM08K.

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HLK-RM08K Sourcing & Technical Support

HLK-RM08K is supplied by Hi-Link. This page provides key purchasing information including manufacturer, package, datasheet, stock reference, price reference and RFQ support.

As your reliable partner for semiconductor solutions, Flychip supports customers from research and development to mass production with electronic component supply, BOM sourcing, PCB, SMT and PCBA solutions.

Our sourcing partners include international chip manufacturers and well-known distributors. With rich experience in channel management, quality control and sales management, Flychip helps customers accelerate product development and delivery.