bibikoo HLK-7688A IoT Home Automation Serial Wireless Module User Manual

: June 12, 2024
: bibikoo

Table of Contents

INTRODUCTION
Typical application
Specification
MODULE PINS DEFINITION
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IoT Home Automation Serial Wireless Module

bibikoo HLK 7688A IoT Home Automation Serial Wireless
Module HLK-7688A user manual

INTRODUCTION

HLK-MT7688A based on MT7688AN is a low cost and low power consumption IOT module developed by Hi-Link.The module supports Linux, OpenWRT operating system and custom development. It could be widely applied to smart devices or cloud services application with its rich interface and powerful processors.

1.1. BASIC PARAMETERS

High data processing ability，MCU frequency 580MHz
150M Mbps
Support 802.11b/g/n
20/40 Channel bandwidth
Support 802.11v
Support AP,STA and AP,STA mixed
Five 10/100M ETH PORT
1 USB2.0 Host interface port
Interface SPI/SD-XC/eMMC
Rich peripheral interfaces，SPI,I2C,I2S,PCM,UART,JTAG,GPIO
Widely used in IOT
Inbuilt powerful PMU
Support 16 Multiple BSSID
Support multiple security methods WEP64/128, TKIP, AES, WPA, WPA2, WAPI
Support QoS，WMM，WMM-PS
The following power is for Japan.
802.11b (2412-2472MHz): 6.0mW/MHz
802.11b (2484MHz): 6.0 mW/MHz
802.11g (2412-2472MHZ):3.0mW/MHz
802.11n HT20 (2412-2472MHZ): 1.5mW/MHz
802.11n HT40 (2422-2472MHZ): 1.0mW/MHz

Typical application

bibikoo HLK 7688A IoT Home Automation Serial Wireless Module - Typical
application HLK- 7688A typical peripheral interfaces

Specification

Item	Parameter
Model	HLK-7688A
Chipset	MT7688AN
Kernel	MIPS24KEc
Basic frequency	580MHz
RAM	DDR2 128MB
Flash	32MB
Temperature	Environmental temperature：-20℃~55℃
**** Humidity	working：0~85%（noncondensing ）

Storage： 0~85%（noncondensing）
**** Size| 18mm×32.8mm×2.8mm

MODULE PINS DEFINITION

3.1. DEFAULT PINS DEFINITION bibikoo HLK 7688A IoT Home Automation
Serial Wireless Module - default definition

3.2. DEGAULT PINS DEFINITION

PIN	Name function 1	GPIO	Note
1	GND
2	3.3VD
3	3.3VD
4	GND
5	SPI_CS0
6	REF_CLK0	GPIO38	****

33333333333333333333333333333333333333333 Time output

Note ：

All pins are Default function 1.

FCC Caution :
Any C hanges or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
FCC Radiation Exposure Statement:
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment .This equipment should be installed and operated with minimum distance 20cm between the radiator& your body.
When the module used in devices requiring additional RF exposure compliance information (e.g., MPE evaluation or SAR testing).
OEM antegrators Installation Manual
List of applicable FCC rules This module has been tested and found to comply with part 15.247 requirements for Modular Approval.
The input voltage to the module should be nominally 3.3V DC, typical value 3.3V DC and the ambient temperature of the module should not exceed 55℃
Limited module procedures N/A
Trace antenna designs N/A
Antenna
The module of HLK-7688A has one antenna port and the antenna gain as below: 2.4G Wi-Fi: 2.89dBi, Antenna cable loss: 0.5dB
The external antenna is Dipole Antenna.
Label and compliance information When the module is installed in the host device, the FCC ID label must be visible through a window on the final device or it must be visible when an access panel, door or cover is easily reamoved. If not, a second label must be placed on the outside of the final device that contains the following text: Contains Transmitter Module FCC ID: 2BBXW-7688, the FCC ID can be used only when all FCC ID compliance requirements are met.

Information on test modes and additional testing requirements

The modular transmitter has been fully tested by the module grantee on the required number of channels, modulation types, and modes, it should not be necessary for the host installer to re‐test all the available transmitter modes or settings. It is recommended that the host product manufacturer, installing the modular transmitter, perform some investigative measurements to confirm that the resulting composite system does not exceed the spurious emissions limits or band edge limits (e.g., where a different antenna may be causing additional emissions).
The testing should check for emissions that may occur due to the intermixing of emissions with the other transmitters, digital circuitry, or due to physical properties of the host product (enclosure). This investigation is especially important when integrating multiple modular transmitters where the certification is based on testing each of them in a stand‐alone configuration. It is important to note that host product manufacturers should not assume that because the modular transmitter is certified that they do not have any responsibility for final product compliance.
If the investigation indicates a compliance concern the host product manufacturer is obligated to mitigate the issue. Host products using a modular transmitter are subject to all the applicable individual technical rules as well as to the general conditions of operation in Sections 15.5, 15.15, and 15.29 to not cause interference. The operator of the host product will be obligated to stop operating the device until the interference has been corrected.

Additional testing, Part 15 Subpart B disclaimer
The final host / module combination need to be evaluated against the FCC Part 15B criteria for unintentional radiators in order to be properly authorized for operation as a Part15 digital device. The host integrator installing this module into their product must ensure that the final composite product complies with the FCC requirements by a technical assessment or evaluation to the FCC rules, including the transmitter operation and should refer to guidance in KDB 996369. For host products with certified modular transmitter, the frequency range of investigation of the composite system is specified by rule in Sections 15.33(a)(1) through (a)(3), or the range applicable to the digital device, as shown in Section 15.33(b)(1), whichever is the higher frequency range of investigation. When testing the host product, all the transmitters must be operating. The transmitters can be enabled by using publicly available drivers and turned on, so the transmitters are active. In certain conditions it might be appropriate to use a technology-specific call box (test set) where accessory devices or drivers are not available. When testing for emissions from the unintentional radiator, the transmitter shall be placed in the receive mode or idle mode, if possible. If receive mode only is not possible then, the radio shall be passive (preferred) and/or active scanning. In these cases, this would need to enable activity on the communication BUS (i.e., PCIe, SDIO, USB) to ensure the unintentional radiator circuitry is enabled. Testing laboratories may need to add attenuation or filters depending on the signal strength of any active beacons (if applicable) from the enabled radio(s). See ANSI C63.4, ANSI C63.10 and ANSI C63.26 for further general testing details.