Integration Manual

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LS-WIFI

8688 Module Specification

1 Features

■ Qualified 2.4-GHz IEEE 802.11b/g transceiver

■ Address the connectivity demand in M2M

applications, e.g. UART-WiFi Bridge, WiFi

Gateway, Wireless Sensor Node and etc

■ ARMv5TE-compliant MCU running up to

106MHz

■ Ultra-low power: 4 uA sleep, 40 mA Rx, 210 mA

■ Receive sensitivity:

• -87 dBm @ b mode

• -72.5 dBm @ g mode

■ Maximum Couducted Peak output power:

• 16 dBm @ b mode

• 16 dBm @ g mode

■ High throughput, 1 Mbps sustained data rate

with TCP/IP and WPA2

■ Small, compact surface-mount module

■ On-board ceramic chip antenna

■ UART hardware interface

■ Supports ad hoc and infrastructure networking

modes

■ On board ECOS -OS, TCP/IP stacks

■ Wi-Fi Alliance certified for WPA2-PSK

■ FCC/CE/ICS certified and RoHS compliant.

Applications

■ Remote equipment monitoring

■ Telemetry

■ Industrial sensors and home automation

controls

■ Medical device monitoring

2 Overview

2.1 Description

The LS-WIFI8688 module is a standalone,

embedded wireless 802.11 b/g networking module.

With its small form factor and extremely low power

consumption, the LS-WIFI8688 is perfect for

mobile wireless applications such as asset

monitoring, GPS tracking, and battery sensors.

The WiFl module incorporates a 2.4-GHz radio,

processor, TCP/IP stack, crypto accelerator,

power management, and analog sensor interfaces.

The module is preloaded with software to simplify

integration and minimize application development.

In the simplest configuration, the hardware

requires only four connections (PWR, TX, RX, and

GND) to create a wireless data connection.

Additionally, the sensor interface provides

temperature, audio, motion, acceleration, and

other analog data without requiring additional

hardware. The module is programmed and

controlled with a simple ASCII command

language.

Once the module is set up, it can scan to find an

access point, associate, authenticate, and

connect over any Wi-Fi network.

2.2 Overview

■ Host data rate up to 1 Mbps for the UART

Summary of content (19 pages)

PAGE 1
LS-WIFI ■ Wi-Fi Alliance certified for WPA2-PSK ■ FCC/CE/ICS certified and RoHS compliant. 8688 Module Specification Applications ■ Remote equipment monitoring ■ Telemetry ■ Industrial sensors and home automation controls ■ Medical device monitoring 2 2.1 1 Features ■ Qualified 2.4-GHz IEEE 802.11b/g transceiver ■ Address the connectivity demand in M2M applications, e.g.
PAGE 2
■ Intelligent, built-in power management with programmable wakeup ■ Real-time clock for time stamping, auto-sleep, and auto-wakeup ■ Configuration over UART using simple ASCII commands ■ Remote configuration over WiFi using Telnet ■ Supports over the air firmware upgrade (FTP) ■ Supports WPS pushbutton mode for easy 3 Electrical characteristics 3.1 DC/RF CHARACTERISTICS 3.11 Characteristics for IEEE802.
PAGE 3
.12 Characteristics for IEEE802.11g 3.
PAGE 4
3.3 Absolute maximum ratings Parameter Minimum Maximum Unit VDD33 -0.3 3.9V V GND - 0 V I/O pin voltage -0.3 VDD33+0.3V V 3.4 Operating conditions Symbol Parameter min Nominal Max Unit VDD33 Supply voltage 3.1 3.3 3.6 V VIH I/O input high voltage 2.3 - Vdd33+0.3 V VIL I/O input low voltage -0.3 - 1.1 V VOH I/O output high voltage 2.57 - - V VOL I/O output low voltage - - 0.4 V 4 Pin-out and signal description 4.
PAGE 5
4.2 Pin Description: No. Terminal Name Type System Connection to IC Terminal Description 1 GND G - VSS Ground 2 NC - - 3 UART_SIN I/O - UART SIN input When not used, this pin should be left floating. UART SOUT outpup When not used, this pin should be left floating. 4 UART_SOUT I/O - 5 NC - - 6 GND G - VSS Ground 7 VDD33 VDD33 - VDD33 3.
PAGE 6
11 12 13 SPI_SDO/ SD_DAT[1] SPI_SCSn/ SD_DAT[0] SPI_SDI/ SD_CMD I/O IO I/O WLAN WLAN WLAN SPI_SDO/ SD_DAT[1] G-SPI Mode: SPI_SDO G-SPI Data Output SDIO 4-bit Mode: SD_DAT[1] Data Line Bit[1] SDIO 1-bit Mode: SD_DAT[1] Interrupt SDIO SPI Mode: SD_DAT[1] Reserved SPI_SCSn/ SD_DAT[0] G-SPI Mode: SPI_SCSn G-SPI Chip Select input (active low) SDIO 4-bit Mode: SD_DAT[0] Data Line Bit[0] SDIO 1-bit Mode: SD_DAT[0] Data Line SDIO SPI Mode: SD_DAT[0] Data Output SPI_SDI/ SD_CMD G-SPI Mode: SPI_SDI G
PAGE 7
5 Functional description 5.1 Functional block diagram 5.2 RF descriptions The LS8688 is equipped with a fully integrated RF to baseband transceiver that operates in both the 2.4 GHz ISM radio band for 802.11g/b WLAN applications, It contains all the circuitry to support both transmit and receive operations. 5.3 On-board antenna specification The LS8688 contains a chip multilayer antenna. Part Number: LDA312G4413H-280. Manufacturer: Murata. Gain: 0.
PAGE 8
5.3.1 Return Loss 5.3.2 Radiation Pattern 5.4 Clock specifications LS8688 has a high-speed 38.4MHz oscillator to provide clock signals for the processors. The customer doesn’t need to use external CLK.
PAGE 9
5.5 UART host interface The LS8688 supports a high speed Universal Asynchronous Receiver/Transmitter (UART) interface. High speed baud rates are supported to provide the physical transport between the device and the host for wireless data connection. Customer can use AT command to control the module. 5.6 G-SPI host interface specifications Referred from Marvell hardware specifications G-SPI Host Interface Transaction Timing 5.
PAGE 10
6 Typical application schematic UART_ RXD HO ST UART_ TXD 3. 3V Regulator 10KΩ 7 Package Module Physical Dimensions (unit: mm) Note: the LS8688 is without shielding box.
PAGE 11
8 Solder reflow temperature profile 11 / 16
PAGE 12
9 AT Command 1.
PAGE 13
Mode: infra channel: 1 rssi: -50 dBm security: OPEN WMM: NO 3.APN (Setup all demand the AP) (1).Demand the setting of current AP: Input:*AT*APN*?* Output:+APN:OK profile=,ssid=,mode=<[infra][ad-hoc]>,security= For example: +APN:OK profile=default,ssid=h3c,mode=infra, security=None (2).
PAGE 14
Output: disconnected, connecting or Connected。 5.wlan-info(Display the information of the current wlan, include SSID, Encryption, IP address) Input:*AT*wlan-info* Output: ◆(If the profile name=Provisioning, SSID= PROV-24-A6-90, Then output:) +wlan-info:OK Profile: provisioning SSID: PROV-24-A6-90 BSSID: 5C:DA:D4:24:A6:90 channel: 11 mode: adhoc security: WEP (shared) address: STATIC IP:192.168.10.1 gateway:192.168.10.1 netmask:255.255.255.0 dns1:192.168.10.1 dns2:192.168.10.
PAGE 15
(System reset, and switch the current mode: provisioning mode transfer to working mode; or working mode transfer to provisioning mode) *AT*RESET*2* (System reset, and erase all the config of the FLASH, include APN, baud rate……) 10.Setting user’s network function (1).The parameter of server（SRVURL） ◆Demand the information of the server Input:*AT*SRVURL*?* Output:+SRVURL:OK Hostname:http://demo90.myit-school.net/ SetDataAPI:LiSeng.Body.Scale.Apps/API.setData.php GetDataAPI:LiSeng.Body.Scale.Apps/API.getData.
PAGE 16
The command format:*AT*GETDATA** If input URL in the command, then the sourcedata will be sent to the URL as http; if without URL in the command, then the sourcedata will be sent to the URL of the SRVURL command setting. For example: Input: *AT*GETDATA*http://demo90.myit-school.net/LiSeng.Body.Scale.Apps/API.getData.
PAGE 17
Federal Communication Commission Interference Statement 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.
PAGE 18
IMPORTANT NOTE: This module is intended for OEM integrator. The OEM integrator is still responsible for the FCC compliance requirement of the end product, which OEM integrates this module. The integration of this RF Module is limited to host devise, where the module with it's onboard has minimum separation distance of 10mm to the human body. Any changes or modifications not expressly approved by the manufacturer could void the user's authority to operate this equipment.
PAGE 19
The device is intended only for OEM integrators under the following conditions: (1) According to FCC Part 15 Subpart C Section 15.212, the radio elements of the modular transmitter must have their own shielding. However, due to there is no shielding for this WIFI module, the integrator has to perform radiated measurements of the host device with the integrated WIFI module to assure compliance with the FCC regulations. (2) According to FCC Part 15 Subpart C Section 15.