Lierda Science and Technology Group LSD4WF WiFi Module User Manual

Lierda Science & Technology Group Co.,Ltd WiFi Module

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User Manual

Lierda Science & Technology Ltd

LSD SCIENCE & TECHNOLOGY CO., LTD.

LSD4WF-2MD05101

Low Power Wi-Fi Module User Manual

Model ：LSD4WF-2MD05101

Name ：Wi-Fi Module

Revision ：v1.0

FCC ID:N8NLSD4WF

Index

1. Product overview.................................................................................................................................................3

1.1 General Description..................................................................................................................................3

1.2 Features........................................................................................................................................................3

2. Parameters.............................................................................................................................................................4

3. Package.................................................................................................................................................................. 4

4. Pin definition.........................................................................................................................................................5

5. Behavior of electricity.........................................................................................................................................6

6. Typical application...............................................................................................................................................7

7. Reference design................................................................................................................................................. 7

8. Developing tool................................................................................................................................................... 8

1. Product overview

1.1 General Description

LSD4WF-2MD05101 is a Wi-Fi module for any electronic device to achieve networking

capabilities. The module is fully in line with the 802.11b/g/n international standard specification, the

internal integrated high performance Cortex M4 and Wi-Fi chip make it easy to access the serial port

equipment or MCU control equipment to network, so as to realize wireless networking.

Built-in TCP/IP protocol stack, supports STA/AP/STA+AP coexistence working modes, supports

802.11b/g/n protocol, supports wireless local upgrade and OTA remote firmware upgrade.

32.8mmx23.1mmx3.2mm, using the stamp hole package, built-in board PCB antenna.

1.2 Features

Confirm with 802.11b/g/n protocol.

Built-in high performance M4 core MCU, highest frequency 100MHz, high speed data

processing ability.

USART/GPIO/SPI/PWM multiple interface.

QJoine high speed link configuration.

Support STA/AP/STA+AP coexist work mode.

Support WPA/WPA2/WEP encryption.

Support wireless, Web page and OTA remote hardware upgrading.

Support multiple net protocol communication.

Provide abundant AT＋instruction set configuration.

Optional built-in on board PCB antenna and external antenna interface.

Dimension：32.8mmx23.1mmx3.2mm, Stamp hole paste.

3.3V single power supply.

CE/FCC.

RoHS.

2. Parameters

Parameters

Wireless

Parameters

Standard 802.11 b/g/n

Frequency 2.412GHz-2.462GHz

Emitting power

Receiving

Sensitivity

802.11b: -83 dBm (@1Mbps ,CCK)

802.11g: -74dBm (@54Mbps, OFDM)

802.11n: -61dBm (@HT20, MCS7)

Antenna Built-in：On board PCB antenna

Hardware

Parameters

Working Voltage 3.3V（3.0V~3.6V）

Working Current Quiescent Current：~20mA

Emitting peak Current：~200mA

Working

Temperature -40℃~ 85℃

Hardware

Interface USART/GPIO/SPI/PWM

Dimension 32.8mmx23.1mmx3.2mm

Software

parameters

Wireless network

type STA/AP/STA+AP

Security

Mechanism WEP/WPA-PSK/WPA2-PSK

Encryption WEP/AES/TKIP

Hardware

upgrading

Local wireless upgrading/ Web page

upgrading/ Remote upgrading

Network Protocol IPv4, TCP/UDP/FTP/HTTP

User

Configuration

QJoine Configuration，AT+instruction，Web

page

Pic1-1 LSD4WF-2MD05101 Basic Parameters

3. Package

Pic 1-2 LSD4WF-2MD05101 Front and back

802.11b:+9.82dBm(@11Mbps)

802.11g:+8.27dBm(@54Mbps)

802.11n:+8.12dBm(@HT20,MCS7)

Unit：mm

Pic 1-3 LSD4WF-2MD05101 module package dimension

4. Pin definition

Pic 1-4 LSD4WF-2MD05101 Module pin layout

Pin Pin definition Function

1 GND Ground pin

2 SWCLK Program download port

5 SWDIO Program download port

9 VCC Power supply pin (DC_3.3V)

17 GND Ground pin

20 GPIO3/USART_CK/TIM1_CH1 Multiplex pin:

IO port/USART / Timer

25 WKUP Module wake up

27 GPIO1/USART_CTS/TIM1_CH4/SPI4_MISO Multiplexed pin：

IO port/USART /timer/SPI port

28 GPIO9/SPI4_SCK/TIM1_CH1N Multiplex pin：

IO port/SPI port/timer

29 GPIO8/SPI4_NSS/TIM1_BKIN Multiplex pin：

IO port/SPI port/timer

30 GPI07/ADC1_1/TIM2_CH2&TIME5_CH5/SPI4_MOSI Multiplex pin：

IO port/ADC/timer/SPI port

31 VCC Power supply pin (DC_3.3V)

32 GND Ground pin

34 VCC Power supply pin（DC_3.3V）

39 USART_TX USARTport Data sendng port

40 GPIO2/USART_RTS/TIM1_ETR Multiplex pin：

IOport/USARTport/timer

41 USART_RX USARTportdata receiver

42 GPIO1/USART_CTS/TIM1_CH4/SPI4_MISO Multiplex pin：

IOport/USARTport/timer/SPIport

43 GPI04/ADC1_9/TIM3_CH4/nLink Multiplex pin：IOport/ADC/timer

44 GPI05/ADC1_8/TIM3_CH3/nReady Multiplex pin：IOport/ADC/timer

45 GPI06/ADC1_4/nReload Multiplex pin:IOport/ADC

47 RST/nReset Reset pin

48 GND Ground pin

Table 1-1 LSD4WF-2MD05101 Module pin definition

5. Behavior of electricity

Parameters Minimum Typical value Maximum Unit

Working voltage 3.0 3.3 3.6 V

Standby current 5 mA

Static current 20 mA

TX current 200 mA

RX current 50 mA

Table1-2 LSD4WF-2MD05101 behavior of electricity

6. Typical application

Pic1-5 LSD4WF-2MD05101 Typical circuit connection

Pin State Remark

NRST411 Input, valid in low level Module reset pin with internal pull resistor

nlink Output (connected to LED) Check the network state of module or indication

for batch upgrade or configuration

nReload Input, valid in low level Connect button to chip pin for factory setting

restoring

Sleep_RQ Input, standby control Connect button to chip pin for module dormancy

managing

Sleep_ON Output, standby state indication Indication of dormancy state, connected with

LED

USART_TX/USAR

T_RX

Serial port transceiver port Serial port transceiver port

Table 1-3 Connection introduction of cardinal pin

7. Reference design

PCB onboard antenna is built in LSD4WF-2MD05101 module, users should using onboard antenna

design need to be cautious that：

1, No components or GND on antenna area of user board

2, Keep antenna away from metal, stay over 10mm away from surrounding higher components.

3, Antenna can’t be covered by metal case and it should be over 10mm away from plastic casing.

During specific design, users can consult the Lierda technical engineer to assist in the place of the

module and related Layout.

8. Developing tool

Lierda would provide a complete set of LSD4WF-2MD05101 development kit for customers to get

familiar with the application and development of the module. Users can configure and debug the

parameters of the LSD4WF-2MD05101 module through the USB interface and the function test. This

development board can directly get power from the USB interface, it also support lithium battery and DC

5~18V DC current supply, convenient for the user.

Pic 1-6 Developing board (front)

Pic 1-7 Developing board (back)

External interface introduction, table: 1-4

Function Item Description

External

interface

USB2TTL UART to USB debugging port, can be used for

power supply

USB DEBUG USB2.0 debugging interface(reserved)

DC5-18V 5~18V DC input

COM1 RS232 interface

RS485 RS485 interface

JMP1 Preserve

JMP2 Preserve

JMP3 4Pin USB and RS232 debugging choosing port, left

choose USB

JPM6 3Pin RS485 与RS232 debugging choosing port, no

wire jumper choose RS232

EXT_PORT LSD4WF-2MD05101 GPIO interface expand

JTAG JTAG data debugging interface

Battery Lithium battery supply interface

LED

indication

light

Power 3.3V power indication

Sleep_ON

Module standby indication

On：Module is in standby mode

Off：Module is working

nReady

Module start or updating ready indication

On：Module started up

Off：Module not started

Blink：Remote updating, blink frequency in

proportion to download speed

nLink

Module connection indication

On：Wi-Fi connected；

Off：Wi-Fi unconnected；

Button

WPS Function reserve

nReset Reset

Sleep_RQ Function reserve

nReload Press button for over 4 seconds to restore to factory

settings.

Table 1-4 External interface introduction of LSD4WF-2MD05101developing board



(OEM)Integratorhastoassurecomplianceoftheentireend‐product

incl.theintegratedRFModule.Additionalmeasurements(15B)and/orequipmentauthorizations

(e.gVerification)mayneedtobeaddresseddependingonco‐locationorsimultaenous

transmissionissuesifapplicable.



Integratorisremindedtoassurethattheseinstallationinstructions

willnotbemadeavailabletotheend‐userofthefinalhostdevice.



Withthelowoutputpower,thisRFModulemeetstheFCCSARexemption

andcanbethereforeintegratedintoany(portable,mobile,fixed)hostdevice.



Thefinalhostdevice,intowhichthisRFModuleisintegrated"hastobelabelled

withanauxilliarylablestatingtheFCCIDoftheRFModule,suchas

"ContainsFCCID:". 



Dependingonthesizeofthefinalend‐product,the§15.19FCCstatement

"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."

shouldbeplacedalsoonthedeviceoralternativelywithinaprominentlocationoftheusers

manual



The§15.21"Changes or modifications to this unit not expressly

approvedbythepartyresponsibleforcompliancecould

voidtheuser’sauthoritytooperatetheequipment."statementhastobeincludedinaprominent

locationoftheusersmanual



N8NLSD4WF

NOTE: This equipment has been tested and found to comply with the limits for a Class B digital

device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection

against harmful interference in a residential installation. This equipment generates, uses and can radiate

radio frequency energy and, if not installed and used in accordance with the instructions, may cause

harmful interference to radio communications. However, there is no guarantee that interference will not

occur in a particular installation. If this equipment does cause harmful interference to radio or television

reception, which can be determined by turning the equipment off and on, the user is encouraged to try to

correct the interference by one or more of the following measures:

—Reorient or relocate the receiving antenna.

—Increase the separation between the equipment and receiver.

—Connect the equipment into an outlet on a circuit different from that to which the receiver is

connected.

—Consult the dealer or an experienced radio/TV technician for help.



Lierda Science and Technology Group LSD4WF WiFi Module User Manual

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