Ogemray Technology WF7681KMX UART WiFi Module User Manual x005f x0001
Shenzhen Ogemray Technology Co.,Ltd UART WiFi Module x005f x0001
User manual
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| Document ID | 2421044 |
| Application ID | pykboVd6fWfjv8YBvefufA== |
| Document Description | User manual |
| Short Term Confidential | No |
| Permanent Confidential | No |
| Supercede | No |
| Document Type | User Manual |
| Display Format | Adobe Acrobat PDF - pdf |
| Filesize | 35.57kB (444619 bits) |
| Date Submitted | 2014-10-17 00:00:00 |
| Date Available | 2014-10-17 00:00:00 |
| Creation Date | 2014-10-17 13:50:03 |
| Producing Software | Acrobat Distiller 9.0.0 (Windows) |
| Document Lastmod | 2014-10-17 08:36:34 |
| Document Title | _x005f_x0001_ |
| Document Creator | WPS Office 个人版 |
| Document Author: | zheng |
Specification UART WiFi Module GWF-KM22 (2.4GHz 802.11 b/g/n) Ver: 1.2 2014-10-17 Contents 1. Introduction............................................................................................................................................................... 1 1.1 Profile................................................................................................................................................................1 1.2 Features............................................................................................................................................................. 1 1.3 Block diagram...................................................................................................................................................2 1.4 Outline...............................................................................................................................................................3 1.5 Specification..................................................................................................................................................... 4 1.6 Pinout configuration......................................................................................................................................... 6 1.7 Characteristics...................................................................................................................................................7 2. Reminds to hardware design................................................................................................................................. 8 2.1 Application........................................................................................................................................................ 8 2.2 GPIO Descriptions............................................................................................................................................8 2.2.1 LED Display......................................................................................................................................9 2.3 UART interface................................................................................................................................................. 9 2.4 Power supply.....................................................................................................................................................9 2.6 Dimensions................................................................................................................................................... 13 2.7 Clear place to use the module.................................................................................................................. 13 3.Software descriptions............................................................................................................................................. 14 3.1 AT command.................................................................................................................................................14 4.Certificate and Approval.........................................................................................................................................15 5.Disclaimer.................................................................................................................................................................15 Figures and tables Table 1-1 General Specification.................................................................................................................................. 3 Table 1-2 Pin configuration......................................................................................................................................... 5 Table 1-3 Absolute Max Rating................................................................................................................................... 6 Table 1-4 DC Characteristics....................................................................................................................................... 6 Table 2-1 UART interface............................................................................................................................................7 Table 2-2 Power input.................................................................................................................................................. 8 Table 5-1 Certificates and Approval.......................................................................................................................... 15 Fig. 1-1 Block diagram-An onboard antenna used......................................................................................................2 Fig. 1-2 Outline reference picture................................................................................................................................3 Fig. 1-3 Pin definition overview.................................................................................................................................. 5 Fig. 2-1 To use external MCU ................................................................................................................................... 6 Fig. 2-2 Reference design of GPIO pins......................................................................................................................7 Fig. 2-3 Reference design for external LED connection.............................................................................................7 Fig. 2-4 UART reference connection diagram............................................................................................................ 9 Fig. 2-5 Ref pic with onboard antenna........................................................................................................................ 9 Fig. 2-6 Dimensions...................................................................................................................................................10 Fig. 2-7 Clear space needed..................................................................................................................................... 11 1. Introduction 1.1 Profile The GWF-KM22 module operates in 2.4GHz ISM frequency band with low power consumption; it applies a highly integrated MAC/BBP in the MT7681 chipset, support IEEE的802.11b/g/n standards with 1T1R technology. This module supports TCP/IP ， UDP protocol ， its low cost and low power consumption, easy using characteristics make the wireless connection become easy and reliable. The single side components mounted module provide 1 UART interface and 4 GPIO ports. The optional on-board or external antenna easy the downstream RF hardware technology requirement. A set of future provided serial AT commands can simplify software design, thus a normal, simple, cheap MCU can be used to control the WiFi module easily. The module includes a number of TCP/IP-based connectivity protocols enabling a low-cost, low-complexity system to contain full-featured internet connectivity and reliable information exchange. This module is mainly used in a multitude of smart home appliances and consumer electronics such as remote control, thermostats, power socket, WIFI audio transmission, LED control, wireless sensor, etc and other applications. 1.2 Features Supports 2.4GHz, 802.11b/g/n Client and AP mode Internal MCU development SDK supported. Smart WiFi configuration supported. Provide 1 UART and 4 GPIO ports. Support WEP,WPA2 encryption mode Selection Client and AP mode RF ON/OFF control, Sleep mode power management. Optional onboard antenna . 1.3 Block diagram Fig. 1- 1 Block diagram--The onboard antenna used 1.4 Outline Fig. 1- 2 Outline reference picture 1.5 Specification Table1 1–1 General Specification Protocol and interface WiFi Protocol IEEE 802.11b/g/n Data interface 1 UART, Max data rate:115200bps I/O ports 4 GPIO LED display Link/Activity display Memory size External SPI Flash 4Mbit WiFi Features WiFi mode Client / Soft AP mode Encryption WPA2-PSK，WEP ( more will be available later) WiFi RF Characteristics Frequency ISM band, 2412~2462MHz. 802.11b (CCK) 11Mbps: 19.5+/-1dBm Tx power （Peak value） 802.11g (OFDM) 54Mbps: 21.5+/-1dBm 802.11n(HT20@MCS7),20.5+/-1dBm Rx sensitivity 802.11b: -86+/-1dBm; 802.11g: -72+/-1dBm, 802.11n (HT20), -68+/-1dBm; Operation Voltage and Current (Typical) Power supply 3.3+/-0.05 VDC 1.1mA Current Sleep mode 6mA RX listen mode 15mA RX power saving, DTIM=1 70mA RX Active、MCS7 220mA 802.11g (OFDM) 54Mbps 210mA 802.11n (HT20@MCS7) 245mA 802.11b (CCK) 11Mbps Operation Condition Operating temperature -10ºC to +60ºC Storage temperature -20ºC to +80ºC Operating humidity 20% to 80% Physical Size 30*18mm Weight 2.4g 1.6 Pinout configuration Shield Case LE Shield Case Fig. 1- 3 Pin definition overview Table1 1–2 Pin configuration Pin Name Description RST External reset active low GND GND 3 VCC 3.3V RXD UART_RXD(UART Receive data) TXD UART_TXD(UART transmit data) GPIO3 GPIO3 GPIO2 GPIO2 GPIO1 GPIO1 GPIO0 GPIO0 10 NC Not Connection Notes: 1. GPIO0〜3 can be pulled up to low or high 2. For the time being only UART/GPIO supported 3. Pin 10 must ben’t connected 4、GPIO1 has been reserved for a AT command mode switching, high level is the AT command mode, low level is pure data model 1.7 Characteristics Table 1- 3 Absolute Max Rating Symbol Description Max rating Unit VCC 3.3V power input -0.3~3.6 VESD ESD protection (HBM) 2000 Table 1- 4 DC Characteristic Symbol Description Condition Min Typ Max Unit 3.3VD Power supply 3.3V 2.97 3.3 3.63 V IL Input low voltage -0.28 N/A 0.6 V IH Input low voltage 2.0 3.3 3.63 LVTTL V T- Negative trigger 0.68 N/A 1.36 V T+ Positive trigger 1.36 N/A 1.7 V OL Output low voltage II OL I=1.6~14mA -0.28 N/A 0.4 V OH Output high voltage II OH I=1.6~14mA 2.4 N/A 3.63 R PU Input pull-up resistance PU=high，PD=low 40 N/A 190 KΩ R PD Input pull-down resistance PU=low，PD=high 40 N/A 190 KΩ 2. Reminds to hardware design 2.1 Application The module is designed with an UART interface, it support TCP/IP protocol, users can use the UART port to transfer data via WiFi connection to other internet devices. Fig. 2-1 To use external MCU 2.2 GPIO Descriptions The KM22 module designed with 4 GPIO port , the fastest interrupt request time is about 1ms。 Each GPIO port can be individually configured as an input or output via software. To stabilize the interface communication, you can add a pull-push circuit as below: Fig. 2- 2 Reference design of GPIO pins Notes: The supply voltage is 3.3V for this module. The default voltage setting of GPIO is also 3.3V. Should other voltage system be applied, a voltage converter must be used. Remarks: the GPIO3 was default assigned for LED display, if this port must be used for other purpose; please specify the requirement when ordering, so that the onboard LED can be removed during production. 2.2.1 LED Display When an external LED to be used, a recommended connection shows as below: Fig. 2- 3 Reference design for external LED connection * the 470 ohm resistor can be changed to a value depends on the brightness of the LED. 2.3 UART interface UART interface Pin Pin name I/O Instruction RXD UART_RXD(UART Receive data) TXD UART_TXD (UART transmit data) Table 2- 1 UART interface The Super terminal or Tera or SecureCRT tool can be sued to test or debug the UART。 The UART setting is 115200，8-N-1; A reference design connection like: Fig. 2- 4 UART reference connection diagram 2.4 Power supply Table 2- 2 pin configuration pin Symbol Description GND Ground 3.3VD 3.3Vpower input Since the module needs clean and low ripple 3.3V DC power supply, please properly design the power supply to this module, otherwise the RF performance of the module might be deteriorated. 2.5 RF output A、onboard antenna Fig. 2-5 Reference pic with onboard antenna 2.6 Dimensions Shield Case LE Shield Case Fig. 2-6 Dimensions 2.7 Clear place to use the module The following drawing shows a recommended footprint which can be a reference for a main PCB design. The clear space requirement for onboard antenna is suit for either pin header or semi-holes connection application. 10 Shield Case LE Shield Case Metallic Clear Area Fig. 2-7 Note： Clear space needed Pin 10 must ben’t connected 3.Software descriptions Right now, to develop customized application, the SDK software pack provided by the chipset manufacturer MTK is recommended to use. Other kind of software supported is not available yet. 3.1 AT command This module applies the chipset MT7681, it has its own internal MCU which can be used to fulfill some sort of software functions. For most of users, to simplify the technology requirement of software programming, an external cheap or simple MCU might be used. In this kind of application, the internal MCU of MT7681 will be limited and can’t be approached by normal users. When an external MCU is selected, several future integrated AT commands may be provided and useful to expedite the software design rather than spend much time to know the kernel Linux driver of the MT7681 The command format： AT#Command -Parameters +enter 11 Command Parameters Descriptions Ver none Display ver Reboot none Reboot Default none Load default Smtconn none Start smart connection mode Conn_AP -sSSID -pPassword Connect ap Uart_Wifi -n(0/1) -m(0/1) -i(ip-addr) -l(local port) -r(remort port) Open TCP/UDP Server/Client Mac none Display the device MAC GPIO -p(pin) -w(0/1) -r(0/1) Write/Read GPIO WMode -w(0/1) Switch to AP/STA mode Puredata none Enter the pure data mode 4.Certificate and Approval Table 4- 1 Certificates and Approval Certificates Remarks FCC part15 Not ready yet CE Not ready yet RoHS Not ready yet 5.Disclaimer THESE MATERIALS AND INFORMATION ARE PROVIDED “AS IS” WITHOUT WARRANTYOF ANY KIND, EITHER EXPRESS OR IMPLIED , INCLUDING BUT NOT LIMITED TO, THEIMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSEOR 12 NON-INFRINGEMENT. We use reasonable efforts to include accurate and up-to-date information on this document; it does not, however, make any representations as to its accuracy or completeness of the information, text, graphics, links or other items contained within these materials. Your use of this Document is at your own risk. Ogemray, its suppliers, and other parties involved in creating and delivering this Document’s contents shall not be liable for any special, indirect, incidental, or consequential damages, including without limitation, lost revenues or lost profits. 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. Caution! Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. FCC Radiation Exposure Statement The modular can be installed or integrated in mobile or fix devices only. This modular cannot be installed in any portable device, for example, USB dongle like transmitters is forbidden. This modular complies with FCC RF radiation exposure limits set forth for an uncontrolled environment. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. This modular must be installed and operated with a minimum distance of 20 cm between the radiator an d user body. If the FCC identification number is not visible when the module is installed inside another device, then th e outside of the device into which the module is installed must also display a label referring to the enclos ed module. This exterior label can use wording such as the following: Contains Transmitter Module FCC ID: YWTWF7681KMX or Contains FCC ID: YWTWF7681KMX when the module is installed inside another device, the user manual of this device must contain below w arning statements; 1. This device complies with Part 15 of the FCC Rules. Operation is subject to the following two condition s: (1) This device may not cause harmful interference. (2) This device must accept any interference received, including interference that may cause undesired o peration. 13 2. Changes or modifications not expressly approved by the party responsible for compliance could void t he user's authority to operate the equipment. The devices must be installed and used in strict accordance with the manufacturer's instructions as desc ribed in the user documentation that comes with the product. 14
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