Ogemray Technology KM26 UART WiFi Module User Manual x005f x005f x005f x0001

Shenzhen Ogemray Technology Co.,Ltd UART WiFi Module x005f x005f x005f x0001

User Manual

All rights reserved by Shenzhen Ogemray Technology Co., Ltd.The content can’t be modified without permission in this documentGWF-KM26Product Specification(2.4GHz/72.2Mbps 802.11 b/g/n)ITEM：GWF-KM26VERSION：V1.0DATE：2016-11-15
Historical ReleasesVersionModified ContentWriterAuditingdateDepartmentV1.0the first versionJasmineNing Qing2016-11-15Product dept.
Catalogue1. Product Introduction.............................................................................................................................................. 11.1 Overview........................................................................................................................................................... 11.2 Features............................................................................................................................................................ 21.3 Product Diagram............................................................................................................................................... 31.4 Appearance....................................................................................................................................................... 31.5 Specification......................................................................................................................................................41.6 Interface Definition...........................................................................................................................................61.7 Electrical Features.............................................................................................................................................81.8 Digital Port Features......................................................................................................................................... 82. Hardware Design Notice......................................................................................................................................... 92.1 Application Diagram......................................................................................................................................... 92.2 GPIO.................................................................................................................................................................. 92.3 UART................................................................................................................................................................102.4 Design requirement of practical application..................................................................................................102.4.1 Reset Sequence................................................................................................................................... 102.5 Power Supply Interface...................................................................................................................................112.6 RF Input and Output Interface........................................................................................................................112.7 Dimension....................................................................................................................................................... 142.8 No wiring area.................................................................................................................................................153. Approval and Certification....................................................................................................................................154. Disclaimer............................................................................................................................................................. 16
Figure CatalogueFigure 1- 1 GWF-KM26............................................................................................................................................2Figure 1- 2 ESP8266EX Functional block diagram.................................................................................................. 3Figure 1- 3 GWF-KM26 Front View......................................................................................................................... 3Figure 1- 4 Dimension.............................................................................................................................................4Figure 1- 5 Pin......................................................................................................................................................... 6Figure 2- 1 Application Diagram............................................................................................................................. 9Figure 2- 2 GPIO reference design.......................................................................................................................... 9Figure 2- 3 LED reference design.......................................................................................................................... 10Figure 2- 4 UART reference design....................................................................................................................... 10Figure 2- 5 KM26 external reset sequence...........................................................................................................11Figure 2- 7 On-board antenna.............................................................................................................................. 12Figure 2- 8 Antenna pattern................................................................................................................................. 12Figure 2- 9 Dimens................................................................................................................................................ 14Figure 2- 10 No wiring area.................................................................................................................................. 15Table CatalogueTable 1- 1 GWF-KM26 Specification....................................................................................................................... 4Table 1- 2 GWF-KM26 Pin Definition...................................................................................................................... 6Table 1- 3 Pin Mode................................................................................................................................................ 7Table 1- 4 Pin Instruction........................................................................................................................................ 7Table 1- 5 Electrical features...................................................................................................................................8Table 1- 6 Data port features.................................................................................................................................. 8Table 2- 1 UART pin definition.............................................................................................................................. 10Table 2- 2 Power supply pin definition................................................................................................................. 11Table 3- 1 Approval and Certification................................................................................................................... 15
1. Product Introduction1.1 OverviewGWF-KM26 adopted ESP8266EX platform, the chip work at 2.4G frequency. ESP8266EX isamong the most integrated Wi-Fi chips in the industry. Measuring just 5mm*5mm, ESP8266EXrequires minimal external circuitry and integrates a 32-bit Tensilica MCU, which features extra lowpower consumption and 16-bit RISC, the main frequency support 80MHz and 160MHz. With RTOS,it integrate WiFi MAC/BB/RF/PA/LNA/on-board antenna.GWF-KM26 support IEEE802.11 b/g/n standard. Using TCP/IP complete protocol stack, usercan use the module to add WiFi network function, it will also establish independent networkcontroller.ESP8266EX is a high-efficiency SOC, it offer the unprecedented practicality by low cost, whichoffer unlimited possibilities for WiFi technology applied to other control system.ESP8266EX is a complete and self-contained WiFi solutions, it can not only run independently,but also work when carried on other host MCU. If ESP8266EX is loaded application as the onlyapplication processor, it will be set up from external flash. Built-in with high speed buffer memory,it is conductive to enhance system performance and reduce RAM demand.In other case, ESP8266EX take charge of accessing to WiFi adapter, we can add it to any MCUdesign, it is easy and convenient. Just need to thorough SPI/SDIO interface or I2C/UART interface.Great capacity for management and memory function make it integrate sensors or otherapplication by GPIO, which occupy the least system resource.With highly integrated on-chip features and minimal external discrete component count, thechip offers reliability, compactness and robustness critical in end products.
1.2 FeaturesSupport 2.4GHz, 802.11b/g/nIntegrate Tensilica L106 low consumption 32-bit MCU, the main frequency support80MHz and 160MHz. With RTOS.Built-in 10-bit high-precision ADC.TCP/IP protocol stack.Integrate TR switch, balun, LNA, power amplifier and matching network.With PLL, AVR and power management part, 20 dBm output power in 802.11b mode.A-MPDU, A-MSDU,0.4 s protection interval.Support WPA/WPA2 Security mode.Support AT remote upgrade and OTA upgrade.Support STA/AP/STA+AP work modeSupport Smart-Config function（Android& iOS device）HSPI,UART, I2C,I2S,IR Remote Control, PWM, GPIODeep sleep current is 10 μA , turn-off current is less than 5 μA .Wake up, connect and transfer data in 2ms.Figure 1- 1 GWF-KM26
1.3 Product Diagram1.4 AppearanceGWF- KM26 dimension is 24.3mm*16mm*3.65mm (As shown in the figure below). The SPI flashcapacity is 8 Mbit packaging SOP-208 mil.Figure 1- 2 ESP8266EX Functional block diagramFigure 1- 3 GWF-KM26 Front View
Figure 1- 4 Dimension1.5 SpecificationTable 1- 1 GWF-KM26 SpecificationProtocol and Interface StandardWiFi StandardIEEE 802.11b/g/nData InterfaceUART/HSPI/I2C/I2S/IR Remote ControlGPIO/PWMI/O Interface9 GPIOLEDWhen the LED flash slow, the module is not access to WiFi.When LED is on, the module has been accessed to WiFi.MemorySPI Flash8 MbitWiFi Features
WiFi work modeSTA/AP/STA+AP/Smart ConfigRF Security modeWPA，WPA2Encryption typeWEP/TKIP/AESWiFi RF ParameterFrequency2.4GHz-2.5GHz (2412MHz-2462MHz)TX PWR802.11b (CCK) 11Mbps: 20+/-1.5dBm802.11g (OFDM) 54Mbps: 15.5+/-1.5dBm802.11n(HT20@MCS7) 72.2Mbps: 14.5+/-1.5dBmRunning CurrentPower Supply3.0~3.6V(3.3V)Running Current80mA (average value)Working ConditionWork Temperature-10ºC to +60ºCStorage TemperatureNormal TemperatureWork Humidity5% to 95%(no condensing)Physical SpecificationPCBA dimension24.3mm*16mm*3.65mmRF RangeIndoor: 45m;Outdoor: 150m(To be depended on the real environment)
1.6 Interface DefinitionFigure 1- 5 PinTable 1- 2 GWF-KM26 Pin DefinitionNo.PinFunction Instruction1GNDGND2ADCA/D result, input voltage range: 0~1V, value range: 0~10243ENChip enable interface, active high enable.4IO16GPIO16;Connecting it to RST pin to wake up deep sleep mode.5IO14GPIO14; HSPI_CLK6IO12GPIO12; HSPI_MISO7IO13GPIO13; HSPI_MOSI; UART0_CTS
8IO15GPIO15; MTDO; HSPICS; UART0_RTS9IO2GPIO2; UART1_TXD10RXDUART0_RXD; GPIO311TXDUART0_TXD; GPIO112IO5GPIO513IO0GPIO014IO4GPIO4153V33.3V Power Supply16GNDGND17RSTResetTable 1- 3 Pin ModeModeGPIO15GPIO0GPIO2UART download modeLowLowHighFlash Boot modeLowHighHighTable 1- 4 Pin InstructionInterfacePinFunction InstructionPWMIO12(R),IO15(G),IO13(B)To control color, buzzer, relay, motor and so on.IRIO14(IR_T), IO5(IR_R)IR Remote Control4 interface is implemented by software, the interfaceuse NEC coding and modem, 38KHz carrier modulationADCTOUTTo detect VDD3P3 (Pin3,Pin4) power voltage an TOUT(Pin6) and inputvoltage(can’t be use at the same time);Sensor application.I2CIO14(SCL), IO2(SDA)To connect to external sensor and display.UARTUART0: TXD(U0TXD),RXD(U0RXD),IO15(RTS),IO13(CTS)To connect to external device UART interface.Download U0TXD+U0RXD or GPIO2+U0RXD.Communication (UART0): U0TXD, U0RXD, MTDO(U0RTS), MTCK(U0CTS)Debug: UART1_TXD (GPIO2),it can be served as debug information print.
UART1: IO2(TXD)UART0 output printing information by ESP8266EX in default. Developerscan user the internal exchange function of UART to interchange U0TXD,U0RXD and U0RTS，U0CTS at the time of initialization, To connect MTDOand MTCK to corresponding UART of external MCU.I2SI2S Input:IO12 (I2SI_DATA) ;IO13 (I2SI_BCK );IO14 (I2SI_WS);It is utilized for audio collection, process and transmission.I2S Output:IO15 (I2SO_BCK );IO3 (I2SO_DATA);IO2 (I2SO_WS).1.7 Electrical FeaturesTable 1- 5 Electrical featuresRated ValueConditionRangeUnitVCCIPC/JEDEC J-STD-020+3.0 to +3.6VVESDESD Protection (HBM)2000V1.8 Digital Port FeaturesTable 1- 6 Data port featuresPortTypical ValueMinimumTypical ValueMaximumUnitInput Logical Level LowVIL-0.30.25VDDVInput Logical Level HighVIH0.75VDDVDD+0.3VOutput Logical Level LowVOLN0.1VDDVOutput Logical Level HighVOH0.8VDDNV
2. Hardware Design Notice2.1 Application DiagramThe module support general UART and network standard. Built-in TCP/IP protocol stack, userscan use the module to add network function. It also can establish independent internet controllerto realize data transmission between UART and WiFi internet. Using GWF-KM26 WiFi module,traditional UART device could be connected to the WiFi network without changing anyconfiguration, to provide complete and quick solutions for UART device. There are two methods tocontrol external devices, the first is that external MCU control WiFi module UART. Secondly, KM26controls external devices by its self-contained UART.The following is application diagram:2.2 GPIOThere are 9 GPIO in the module, the minimum interrupt response time is 1ms, these GPIO could beconfigured by software directly like UART, LED, IR control.Figure 2- 1 Application DiagramFigure 2- 2 GPIO reference design
To control LED brightness by adjusting resistance value of R8.Note: If the LED is in semi-bright for a long time, please try to reset.2.3 UARTTable 2- 1 UART pin definitionGWF-KM26 default configuration10 pin for UART RXD11 pin for UART TXDHyper terminal, Tera or Secure CRT can be regarded as communication tools for UART interface debug.The UART setting is 115200; 8-N-1.The following figure is a reference design selection.2.4 Design requirement of practical application2.4.1 Reset SequenceKM26 need to reset external reset signal (Active Low ),external reset sequence as shown in the figure below:UART interfacePinPin nameI/OInstruction10RXDIUART_RXD(UART Receive Data)11TXDOUART_TXD (UART Transmit Data)Figure 2- 3 LED reference designFigure 2- 4 UART reference design
T3: 30ms ~50ms2.5Power Supply InterfaceTable 2- 2 Power supply pin definitionPower Supply InterfacePin No.PinI/OInstruction16GNDPowerGround15VCCPower3.3V InputBecause module need low ripple DC power supply, please design the power module accurately, otherwise, it maylead to RF performance degradation.2.6 RF Input and Output InterfaceA. Using on-board antenna, we need to place 1nH inductance, remain IPEX empty.Figure 2- 5 KM26 external reset sequence
Figure 2- 6 On-board antennaFigure 2- 7 Antenna patternPeak gain: -1dBi; average gain: -3dBiB. External antenna is connected to IPEX by RF cable, we should not add inductance to the board.
Above figure is suggested antenna（Airgain P / N：N2420）and its antenna pattern.
2.7 DimensionFigure 2- 8 Dimens
2.8 No wiring areaFigure 2- 9 No wiring area3. Approval and CertificationTable 3- 1 Approval and CertificationCertificationApprovalFCC part15OngoingCEOngoingRoHSPass
4. DisclaimerThese material and information are provided “as is” without warranty of any kind, either express ofimplied, including but not limited to, the implied warranties of merchantability, fitness for a particularpurpose or non-infringement.We use reasonable efforts to include accurate and up-to-date information on this document, it doesnot, 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 shallnot be liable for any special, indirect, incidental, or consequential damages, including without limitation, lostrevenues or lost profits.
FCC Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate this 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. This device and its antenna(s) must not be co-located or operating in conjunction with any other antenna or transmitter. 15.105 Information to the user. (b) For a Class B digital device or peripheral, the instructions furnished the user shall include the following or similar statement, placed in a prominent location in the text of the manual: 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. 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 and your body. Radiation Exposure Statement: This equipment complies with FCC 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. The module should not be installed and operated simultaneously with other radios except additional RF exposure was evaluated for simultaneously transmission. The availability of some specific channels and/or operational frequency bands are country dependent and are firmware programmed at the factory to match the intended destination. The firmware setting is not accessible by the end user. The final end product must be labelled in a visible area with the following: “Contains Transmitter Module YWT-KM26”

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