GWF-KM26 Product Specification (2.4GHz/72.2Mbps 802.11 b/g/n) ITEM：GWF-KM26 VERSION：V1.0 DATE：2016-11-15 All rights reserved by Shenzhen Ogemray Technology Co., Ltd.
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............................................................................................................................................
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..........
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.
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.
1.3Appearance 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- 4 Dimension 1.4Specification Table 1- 1 GWF-KM26 Specification Protocol and Interface Standard WiFi Standard Data Interface I/O Interface LED IEEE 802.11b/g/n 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.
WiFi work mode STA/AP/STA+AP/Smart Config RF Security mode WPA，WPA2 Encryption type WEP/TKIP/AES WiFi RF Parameter Frequency 2.4GHz-2.5GHz (2400M-2483.5M) 802.11b (CCK) 11Mbps: 20+/-1.5dBm TX PWR 802.11g (OFDM) 54Mbps: 15.5+/-1.5dBm 802.11n(HT20@MCS7) 72.2Mbps: 14.5+/-1.5dBm Running Current Power Supply Running Current 3.0~3.6V(3.
1.5 Interface Definition Figure 1- 5 Pin Table 1- 2 GWF-KM26 Pin Definition No. Pin Function Instruction 1 GND GND 2 ADC A/D result, input voltage range: 0~1V, value range: 0~1024 3 EN Chip enable interface, active high enable. 4 IO16 GPIO16; Connecting it to RST pin to wake up deep sleep mode.
8 IO15 GPIO15; MTDO; HSPICS; UART0_RTS 9 IO2 GPIO2; UART1_TXD 10 RXD UART0_RXD; GPIO3 11 TXD UART0_TXD; GPIO1 12 IO5 GPIO5 13 IO0 GPIO0 14 IO4 GPIO4 15 3V3 3.3V Power Supply 16 GND GND 17 RST Reset Table 1- 3 Pin Mode Mode GPIO15 GPIO0 GPIO2 UART download mode Low Low High Flash Boot mode Low High High Table 1- 4 Pin Instruction Interface PWM Pin IO12(R), IO15(G),IO13(B) Function Instruction To control color, buzzer, relay, motor and so on.
UART1: IO2(TXD) UART0 output printing information by ESP8266EX in default. Developers can user the internal exchange function of UART to interchange U0TXD, U0RXD and U0RTS，U0CTS at the time of initialization, To connect MTDO and MTCK to corresponding UART of external MCU. I2S I2S 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.
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.
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.
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. Pin I/O Instruction 16 GND Power Ground 15 VCC Power 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: -1dBi B. 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.
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2.8 No wiring area Figure 2- 9 No wiring area 3.
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.
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.
Requirement per KDB996369 D03 2.2 List of applicable FCC rules List the FCC rules that are applicable to the modular transmitter. These are the rules that specifically establish the bands of operation, the power, spurious emissions, and operating fundamental frequencies. DO NOT list compliance to unintentional-radiator rules (Part 15 Subpart B) since that is not a condition of a module grant that is extended to a host manufacturer. See also Section 2.
2.5 Trace antenna designs For a modular transmitter with trace antenna designs, see the guidance in Question 11 of KDB Publication 996369 D02 FAQ – Modules for Micro-Strip Antennas and traces. The integration information shall include for the TCB review the integration instructions for the following aspects: layout of trace design, parts list (BOM), antenna, connectors, and isolation requirements. a) Information that includes permitted variances (e.g.
For situations where the host product manufacturer is responsible for an external connector, for example with an RF pin and antenna trace design, the integration instructions shall inform the installer that unique antenna connector must be used on the Part 15 authorized transmitters used in the host product. The module manufacturers shall provide a list of acceptable unique connectors. Explanation: The EUT has one PCB Antenna, The antenna cannot be removed, Unconventional interface 2.
