GWF-KM26 Product Specification
(2.4GHz/72.2Mbps 802.11 b/g/n) ITEMGWF-KM26 VERSIONV1.0 DATE2016-11-15 All rights reserved by Shenzhen Ogemray Technology Co., Ltd. The content cant be modified without permission in this document Historical Releases Version Modified Content Writer Auditing date Department V1.0 the first version Jasmine Ning Qing 2016-11-15 Product dept. Catalogue 1. 2. 3. 4. Product Introduction.............................................................................................................................................. 1 1.1 Overview........................................................................................................................................................... 1 1.2 Features............................................................................................................................................................ 2 1.3 Product Diagram............................................................................................................................................... 3 1.4 Appearance.......................................................................................................................................................3 1.5 Specification......................................................................................................................................................4 1.6 Interface Definition...........................................................................................................................................6 1.7 Electrical Features.............................................................................................................................................8 1.8 Digital Port Features......................................................................................................................................... 8 Hardware Design Notice.........................................................................................................................................9 2.1 Application Diagram......................................................................................................................................... 9 2.2 GPIO.................................................................................................................................................................. 9 2.3 UART................................................................................................................................................................10 2.4 Design requirement of practical application..................................................................................................10 2.4.1 Reset Sequence................................................................................................................................... 10 2.5 Power Supply Interface...................................................................................................................................11 2.6 RF Input and Output Interface........................................................................................................................11 2.7 Dimension....................................................................................................................................................... 14 2.8 No wiring area.................................................................................................................................................15 Approval and Certification....................................................................................................................................15 Disclaimer............................................................................................................................................................. 16 Figure Catalogue Figure 1- 1 GWF-KM26............................................................................................................................................2 Figure 1- 2 ESP8266EX Functional block diagram.................................................................................................. 3 Figure 1- 3 GWF-KM26 Front View.........................................................................................................................3 Figure 1- 4 Dimension.............................................................................................................................................4 Figure 1- 5 Pin......................................................................................................................................................... 6 Figure 2- 1 Application Diagram............................................................................................................................. 9 Figure 2- 2 GPIO reference design.......................................................................................................................... 9 Figure 2- 3 LED reference design.......................................................................................................................... 10 Figure 2- 4 UART reference design....................................................................................................................... 10 Figure 2- 5 KM26 external reset sequence...........................................................................................................11 Figure 2- 7 On-board antenna.............................................................................................................................. 12 Figure 2- 8 Antenna pattern................................................................................................................................. 12 Figure 2- 9 Dimens................................................................................................................................................ 14 Figure 2- 10 No wiring area.................................................................................................................................. 15 Table Catalogue Table 1- 1 GWF-KM26 Specification....................................................................................................................... 4 Table 1- 2 GWF-KM26 Pin Definition......................................................................................................................6 Table 1- 3 Pin Mode................................................................................................................................................ 7 Table 1- 4 Pin Instruction........................................................................................................................................ 7 Table 1- 5 Electrical features...................................................................................................................................8 Table 1- 6 Data port features.................................................................................................................................. 8 Table 2- 1 UART pin definition.............................................................................................................................. 10 Table 2- 2 Power supply pin definition................................................................................................................. 11 Table 3- 1 Approval and Certification................................................................................................................... 15 1. Product Introduction 1.1 Overview GWF-KM26 adopted ESP8266EX platform, the chip work at 2.4G frequency. ESP8266EX is among the most integrated Wi-Fi chips in the industry. Measuring just 5mm*5mm, ESP8266EX requires minimal external circuitry and integrates a 32-bit Tensilica MCU, which features extra low power 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, user can use the module to add WiFi network function, it will also establish independent network controller. ESP8266EX is a high-efficiency SOC, it offer the unprecedented practicality by low cost, which offer 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 only application 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 MCU design, 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 other application by GPIO, which occupy the least system resource. With highly integrated on-chip features and minimal external discrete component count, the chip 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 support 80MHz 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 functionAndroid& iOS device HSPI,UART, I2C,I2S,IR Remote Control, PWM, GPIO Deep sleep current is 10 A , turn-off current is less than 5 A . Wake up, connect and transfer data in 2ms. Figure 1- 1 GWF-KM26 1.3 Product Diagram Figure 1- 2 ESP8266EX Functional block diagram 1.4 Appearance GWF- KM26 dimension is 24.3mm*16mm*3.65mm (As shown in the figure below). The SPI flash capacity is 8 Mbit packaging SOP-208 mil. Figure 1- 3 GWF-KM26 Front View Figure 1- 4 Dimension 1.5 Specification Table 1- 1 GWF-KM26 Specification Protocol and Interface Standard WiFi Standard IEEE 802.11b/g/n Data Interface I/O Interface LED UART/HSPI/I2C/I2S/IR Remote Control GPIO/PWM 9 GPIO When the LED flash slow, the module is not access to WiFi. When LED is on, the module has been accessed to WiFi. Memory SPI Flash 8 Mbit WiFi Features WiFi work mode RF Security mode Encryption type STA/AP/STA+AP/Smart Config WPAWPA2 WEP/TKIP/AES WiFi RF Parameter Frequency 2.4GHz-2.5GHz (2412MHz-2462MHz) 802.11b (CCK) 11Mbps: 20+/-1.5dBm 802.11g (OFDM) 54Mbps: 15.5+/-1.5dBm 802.11n(HT20@MCS7) 72.2Mbps: 14.5+/-1.5dBm TX PWR Running Current Power Supply 3.0~3.6V(3.3V) Running Current Working Condition Work Temperature 80mA (average value)
-10C to +60C Storage Temperature Normal Temperature Work Humidity 5% to 95%(no condensing) Physical Specification PCBA dimension 24.3mm*16mm*3.65mm RF Range Indoor: 45m; Outdoor: 150m(To be depended on the real environment) 1.6 Interface Definition Figure 1- 5 Pin Table 1- 2 GWF-KM26 Pin Definition No. 1 2 3 4 5 6 7 Pin GND ADC EN IO16 IO14 IO12 IO13 Function Instruction GND A/D result, input voltage range: 0~1V, value range: 0~1024 Chip enable interface, active high enable. GPIO16;
Connecting it to RST pin to wake up deep sleep mode. GPIO14; HSPI_CLK GPIO12; HSPI_MISO GPIO13; HSPI_MOSI; UART0_CTS 8 9 10 11 12 13 14 15 16 17 IO15 IO2 RXD TXD IO5 IO0 IO4 3V3 GND RST Table 1- 3 Pin Mode Mode UART download mode Flash Boot mode Table 1- 4 Pin Instruction Interface Pin IO12(R), PWM IO15(G),IO13(B) GPIO15; MTDO; HSPICS; UART0_RTS GPIO2; UART1_TXD UART0_RXD; GPIO3 UART0_TXD; GPIO1 GPIO5 GPIO0 GPIO4 3.3V Power Supply GND Reset GPIO15 Low Low GPIO0 Low High GPIO2 High High Function Instruction To control color, buzzer, relay, motor and so on. IR IO14(IR_T), IO5(IR_R) ADC TOUT I2C UART IO14(SCL), IO2(SDA) UART0: TXD(U0TXD), RXD(U0RXD), IO15(RTS), IO13(CTS) IR Remote Control4 interface is implemented by software, the interface use NEC coding and modem, 38KHz carrier modulation To detect VDD3P3 (Pin3,Pin4) power voltage an TOUT(Pin6) and input voltage(cant be use at the same time);
Sensor application. To connect to external sensor and display. 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. UART0 output printing information by ESP8266EX in default. Developers can user the internal exchange function of UART to interchange U0TXD, U0RXD and U0RTSU0CTS at the time of initialization, To connect MTDO and MTCK to corresponding UART of external MCU. It is utilized for audio collection, process and transmission. UART1: IO2(TXD) I2S Input:
IO12 (I2SI_DATA) ;
IO13 (I2SI_BCK );
IO14 (I2SI_WS);
I2S Output:
IO15 (I2SO_BCK );
IO3 (I2SO_DATA);
IO2 (I2SO_WS). I2S 1.7 Electrical Features Table 1- 5 Electrical features Rated Value Condition VCC VESD IPC/JEDEC J-STD-020 ESD Protection (HBM) Range
+3.0 to +3.6 2000 Unit V V 1.8 Digital Port Features Table 1- 6 Data port features Port Typical Value Minimum Typical Value Maximum Unit Input Logical Level Low Input Logical Level High Output Logical Level Low Output Logical Level High VIL VIH VOL VOH
-0.3 0.75VDD N 0.8VDD 0.25VDD VDD+0.3 0.1VDD N V V V V 2. Hardware Design Notice 2.1 Application Diagram The module support general UART and network standard. Built-in TCP/IP protocol stack, users can use the module to add network function. It also can establish independent internet controller to 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 any configuration, to provide complete and quick solutions for UART device. There are two methods to control external devices, the first is that external MCU control WiFi module UART. Secondly, KM26 controls external devices by its self-contained UART. The following is application diagram:
Figure 2- 1 Application Diagram 2.2 GPIO There are 9 GPIO in the module, the minimum interrupt response time is 1ms, these GPIO could be configured by software directly like UART, LED, IR control. Figure 2- 2 GPIO reference design Figure 2- 3 LED 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 UART Table 2- 1 UART pin definition UART interface Pin 10 11 Pin name RXD TXD I/O I O Instruction UART_RXD(UART Receive Data) UART_TXD (UART Transmit Data) GWF-KM26 default configuration 10 pin for UART RXD 11 pin for UART TXD Hyper 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. Figure 2- 4 UART reference design 2.4 Design requirement of practical application 2.4.1 Reset Sequence KM26 need to reset external reset signal (Active Low ),external reset sequence as shown in the figure below:
T3: 30ms ~50ms Figure 2- 5 KM26 external reset sequence 2.5 Power Supply Interface Table 2- 2 Power supply pin definition Power Supply Interface Pin No. 16 15 Pin GND VCC I/O Power Power Instruction Ground 3.3V Input Because module need low ripple DC power supply, please design the power module accurately, otherwise, it may lead to RF performance degradation. 2.6 RF Input and Output Interface A. Using on-board antenna, we need to place 1nH inductance, remain IPEX empty. Figure 2- 6 On-board antenna Figure 2- 7 Antenna pattern Peak gain: -1dBi; average gain: -3dBi B. External antenna is connected to IPEX by RF cable, we should not add inductance to the board. Above figure is suggested antennaAirgain P / NN2420and its antenna pattern. 2.7 Dimension Figure 2- 8 Dimens 2.8 No wiring area Figure 2- 9 No wiring area 3. Approval and Certification Table 3- 1 Approval and Certification Certification FCC part15 CE RoHS Approval Ongoing Ongoing Pass 4. Disclaimer These material and information are provided as is without warranty of any kind, either express of implied, including but not limited to, the implied warranties of merchantability, fitness for a particular purpose or 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 Documents contents shall not be liable for any special, indirect, incidental, or consequential damages, including without limitation, lost revenues 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 bo dy. 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