BiTrend™ EssentialSeriesWi-Fi Module User Manual WT1SBSL
Hangzhou Gubei Electronics Technology Co., Ltd. Copyright Information The information contained in this document is the proprietary information of Hangzhou Gubei Electronics Technology Co., Ltd. (hereinafter referred as BroadLink). Further, no portion of this document may be altered or edited in any form or by any meanswithout the prior written consent of BroadLink, the copyrightholder.
Table of Contents 1. Introduction ................................................................................................................................. 3 1.1 Overview ............................................................................................................................ 3 1.2 Applications....................................................................................................................... 4 1.3 Key Features ...................................................
1. Introduction 1.1 Overview BiTrend™ Essentialis the industrial leading 2.4Ghz 802.11 b/g/n embedded Wi-Fi module which delivers unmatched performance and codeless development in a compact package, providing a quick, easy and cost effective way for developers and manufacturers to add Wi-Fi connectivity for home automation, lighting control, energy efficiency and other IOT applications. BiTrend™ Essential family combines a 2.4Ghz 802.
RF_IN RF receiver Baseband RF_OUTP RF_OUTN RF transmitter MAC / Packet buffer / security engine UART System control UART GPIO/LED Figure 1. WT1SBSL block diagram 1.2 Applications Smart home appliances Remote Control Medical/Health Care Network consumer devices 1.3 Key Features a. Support IEEE802.11b/g/n b. Support UARTtransparent transfer c. Support STA\AP d. Patent SmartConfig™ technology e. Support IPv4, TCP/UDP/ DNS/DHCP f. PCB printed antenna g. Power source: 3.
2. Product Overview 2.1 Product Picture 2.2 Block Diagram 40MHz OSC Reset UART PCB Antenna Filter Circuit Balun Circuit MTK7681 802.11 b/g/n SoC SPI FLASH Multiplex Circuit GPIO 5www.ibroadlink.
3. Electrical Characteristics 3.1 Absolute Maximum Ratings – Voltage & Current Using products above the absolute maximum ratings may cause permanent damage to the device. These are maximum ratings only and functional operation of the device at these conditions is not implied. Exposure to maximum rating conditions for extended periods may a ect the reliability of the device. Symbol Rating MIN TYP MAX Unit VDD33 3.3V Supply Voltage 2.97 3.3 3.
3.3 Absolute maximum ratings – Temperature Rati Symbol Max Unit TSTG Storagetemperature –40 to+125 ℃ TA Workingtemperature -10 to+70 ℃ Humidity Non condensing, relative humidity 90%(RH) 3.4Absolute maximum ratings – ESD Symbol VESD(HBM) Ratings Conditions Class Max Unit Electrostatic discharge voltage (human body model) TA = +25 °C conforming to JESD22-A114 2 2000 V 7www.ibroadlink.
4. Module Interfaces 4.1 PIN Layout WT1SBSL has one group of pins2X7. The layout of PINs are shown in the figure below. Figure6.WT1SBSLpin-out 4.2 PIN Definitions PIN Assignment PIN PIN NAME NOTE Pin1 GND Pin2 VCC 3.3V Pin3 RST_N Module software reset,Available at low level Pin4 UART_TX Pin5 UART_RX UART Only for Passthrough Pin6 GPIO3 Pin7 GPIO4 Feed watchdog Pin8 GPIO4 Feed watchdog Pin9 GPIO3 Pin10 GPIO2 8www.ibroadlink.
Pin11 GPIO1 Module software reset, Available at High level Pin12 GPIO0 Usually use as Wi‐Fi LED Pin13 VCC 3.3V Pin14 GND 5.
6. AntennaCharacteristics 6.1 Antenna Selection The WT1SBSL supports on-board PCB printed antenna.When the Operating Frequencyis between 2.4G~2.5GHz, S11 of antenna port is less than-10dB and peak gainis about 1. 5dBi. Figure 7. Antenna radiation pattern simulation Figure 8. Antenna port S11simulation curve In practical use, WT1SBSL is welded on user’s boardand value of S11 has some changes. 10www.ibroadlink.
6.2 Minimizing Radio Interference When integrating the Wi-Fi module with on board PCB printed antenna, make sure the three points below: 1. The area under the antenna end of the module should be keep clear of metallic components, connectors, vias, traces and other materials that can interfere with the radio signal. 2. The area around the antenna end the module protrudes at least 10mm from the mother board PCB and any metal enclosure. 3.
6.3 Specification of On-Board Antenna OperatingFrequency 2.4G~2.5GHz VSWR(max) 2 Peak Gain 1.45dBi AntennaType PIFA 12www.ibroadlink.
Appendix A Glossary(Quentin respible) ADC AES ANT AP BPSK Analog‐to ‐Digital Converter Advanced Encryption Standard Antenna Wireless Access Point Binary Phase Shift Keying DBPSK DC Differential binary phase shift keying Direct Current CCK CDM Complementary Code Keying Charge Device Model DHCP Dynamic Host Configuration Protocol CMOS Complementary Metal Oxide Semiconductor DNS DQPSK DSSS DTIM EMSP ESD EVM FCC FER GND GPIO HBM IEEE IO IOT IPv4 LED LVTTL MAC MCS MCU MIMO MSL NC NRST OFDM OSC PCB PIFA
RISC RoHS RX SDIO SoC SPDT SPI STA TCP TKIP TX IP UART UDP UFL Reduced Instruction Set Computer Restriction of Hazardous Substances Receiver Serial Digital Input/Output System on Chip Single-Pole Double-Throw Serial Peripheral Interface Spanning Tree Algorithm Transfer Control Protocol Temporal Key Integrity Protocol Transmitter Internet Protocol Universal Asynchronous Receiver/Transmitter User Datagram Protocol a miniature coaxial RF connector for high-frequency signals manufactured by Hirose Electric Gro
Appendix B Reference paper(Quentin respible) [1] IEEE 802.11b/g/n- published IEEE 802.11-2007wireless networking standard and published IEEE 802.11-2012 standard for Information technology - Clause 19 of the publishedIEEE 802.11-2007 standard, and Clause 19 of the published IEEE 802.11-2012 standard. 15www.ibroadlink.
Contact Us Hangzhou Gubei Electronics Technology Co., Ltd. Room 106, Building 1, No. 611 Jianghong Road, Binjiang, Hangzhou, Zhejiang, P.R.China T: +86-571-85159281 F: +86-571-86631817 E: intl@broadlink.com.cn W: www.ibroadlink.com.cn This device complies with Part 15 of the FCC Rules / Industry Canada licence‐exempt RSS standard(s).
—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. MPE Requirements To satisfy FCC / IC RF exposure requirements, a separation distance of 20 cm or more should be maintained between the antenna of this device and persons during device operation.