OGEMRAY GWF-KM26 UART Wi-Fi Module User Manual

User Manual for OGEMRAY models including: GWF-KM26, GWFKM26, 2AWY7GWF-KM26, 2AWY7GWFKM26, GWF-KM26 UART Wi-Fi Module, UART Wi-Fi Module, Wi-Fi Module

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User Manual

The Tata Power Company Limited GWF-KM26 UART WiFi Module 2AWY7GWF-KM26 2AWY7GWFKM26 gwf km26

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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 can't be modified without permission in this document

Historical Releases

Version V1.0

Modified Content the first version

Writer Auditing

date

Department

Jasmine Ning Qing 2016-11-15 Product dept.

Catalogue
1. 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
2. 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
3. Approval and Certification....................................................................................................................................15 4. 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

1.3Appearance
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- 3 GWF-KM26 Front View

1.4Specification

Figure 1- 4 Dimension

Table 1- 1 GWF-KM26 Specification Protocol and Interface Standard

WiFi Standard Data Interface I/O Interface
LED Memory

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.

SPI Flash WiFi Features

8 Mbit

WiFi work mode RF Security mode Encryption type WiFi RF Parameter

STA/AP/STA+AP/Smart Config WPAWPA2 WEP/TKIP/AES

Frequency

2.4GHz-2.5GHz (2400M-2483.5M)

TX PWR
Running Current Power Supply

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
3.0~3.6V(3.3V)

Running Current Working Condition
Work Temperature

80mA (average value) -10ºC to +60ºC

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)

1.5 Interface Definition

Figure 1- 5 Pin

Table 1- 2 GWF-KM26 Pin Definition

No.

Function Instruction

GND

ADC

A/D result, input voltage range: 0~1V, value range: 0~1024

Chip enable interface, active high enable.

IO16

IO14

GPIO16; Connecting it to RST pin to wake up deep sleep mode.
GPIO14; HSPI_CLK

IO12

GPIO12; HSPI_MISO

IO13

GPIO13; HSPI_MOSI; UART0_CTS

IO15

IO2

RXD

TXD

IO5

IO0

IO4

3V3

GND

RST

GPIO15; MTDO; HSPICS; UART0_RTS GPIO2; UART1_TXD UART0_RXD; GPIO3 UART0_TXD; GPIO1 GPIO5 GPIO0 GPIO4 3.3V Power Supply GND Reset

Table 1- 3 Pin Mode Mode UART download mode
Flash Boot mode

GPIO15 Low Low

GPIO0 Low High

GPIO2 High High

Table 1- 4 Pin Instruction

Interface Pin

Function Instruction

PWM

IO12(R), IO15(G),IO13(B)

To control color, buzzer, relay, motor and so on.

IO14(IR_T), IO5(IR_R)

IR Remote Control4 interface is implemented by software, the interface use NEC coding and modem, 38KHz carrier modulation

ADC

TOUT

To detect VDD3P3 (Pin3,Pin4) power voltage an TOUT(Pin6) and input voltage(can't be use at the same time); Sensor application.

I2C

IO14(SCL), IO2(SDA) To connect to external sensor and display.

UART0: TXD(U0TXD),

UART

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. 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.

I2S Input:

IO12 (I2SI_DATA) ;

IO13 (I2SI_BCK );

I2S

IO14 (I2SI_WS); I2S Output:

It is utilized for audio collection, process and transmission.

IO15 (I2SO_BCK );

IO3 (I2SO_DATA);

IO2 (I2SO_WS).

1.6 Electrical Features

Table 1- 5 Electrical features

Rated Value

Condition

Range

Unit

VCC

IPC/JEDEC J-STD-020

+3.0 to +3.6

VESD

ESD Protection (HBM)

2000

1.7 Digital Port Features

Table 1- 6 Data port features

Port

Typical Value Minimum Typical Value Maximum Unit

Input Logical Level Low

VIL

-0.3

0.25VDD

Input Logical Level High

VIH

0.75VDD

VDD+0.3

Output Logical Level Low

VOL

0.1VDD

Output Logical Level High

VOH

0.8VDD

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:

2.2 GPIO

Figure 2- 1 Application Diagram

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 name

I/O

Instruction

RXD

UART_RXD(UART Receive Data)

TXD

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.

I/O

GND

Power

VCC

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: -1dBi
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 Document's 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 FCC ID: 2AWY7GWF-KM26

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 2.10 below concerning the need to notify host manufacturers that further testing is required.3 Explanation: This module meets the requirements of FCC part 15C(15.247).it specifically establish the 6dB Bandwidth, Peak Output Power, Radiated Spurious Emission, Power Spectral Density, Restricted Band of Operation and Band Edge (Out of Band Emissions)
2.3 Summarize the specific operational use conditions
Describe use conditions that are applicable to the modular transmitter, including for example any limits on antennas, etc. For example, if point-to-point antennas are used that require reduction in power or compensation for cable loss, then this information must be in the instructions. If the use condition limitations extend to professional users, then instructions must state that this information also extends to the host manufacturer's instruction manual. In addition, certain information may also be needed, such as peak gain per frequency band and minimum gain, specifically for master devices in 5 GHz DFS bands. Explanation: The module has one PCB antenna, The antenna cannot be removed, Unconventional interface
2.4 Limited module procedures If a modular transmitter is approved as a "limited module," then the module manufacturer is responsible for approving the host environment that the limited module is used with. The manufacturer of a limited module must describe, both in the filing and in the installation instructions, the alternative means that the limited module manufacturer uses to verify that the host meets the necessary requirements to satisfy the module limiting conditions. A limited module manufacturer has the flexibility to define its alternative method to address the conditions that limit the initial approval, such as: shielding, minimum signaling amplitude, buffered modulation/data inputs, or power supply regulation. The alternative method could include that the limited module manufacturer reviews detailed test data or host designs prior to giving the host manufacturer approval. This limited module procedure is also applicable for RF exposure evaluation when it is necessary to demonstrate compliance in a specific host. The module manufacturer must state how control of the product into which the modular transmitter will be installed will be maintained such that full compliance of the product is always ensured. For additional hosts other than the specific host originally granted with a limited module, a Class II permissive change is required on the module grant to register the additional host as a specific host also approved with the module. Explanation: The module is a single module.

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., trace boundary limits, thickness, length, width, shape(s), dielectric constant, and impedance as applicable for each type of antenna); b) Each design shall be considered a different type (e.g., antenna length in multiple(s) of frequency, the wavelength, and antenna shape (traces in phase) can affect antenna gain and must be considered); c) The parameters shall be provided in a manner permitting host manufacturers to design the printed circuit (PC) board layout; d) Appropriate parts by manufacturer and specifications; e) Test procedures for design verification; and f) Production test procedures for ensuring compliance. The module grantee shall provide a notice that any deviation(s) from the defined parameters of the antenna trace, as described by the instructions, require that the host product manufacturer must notify the module grantee that they wish to change the antenna trace design. In this case, a Class II permissive change application is required to be filed by the grantee, or the host manufacturer can take responsibility through the change in FCC ID (new application) procedure followed by a Class II permissive change application. Explanation: Yes, The module with trace antenna designs, and This manual has been shown the layout of trace design,, antenna, connectors, and isolation requirements.
2.6 RF exposure considerations It is essential for module grantees to clearly and explicitly state the RF exposure conditions that permit a host product manufacturer to use the module. Two types of instructions are required for RF exposure information: (1) to the host product manufacturer, to define the application conditions (mobile, portable xx cm from a person's body); and (2) additional text needed for the host product manufacturer to provide to end users in their end-product manuals. If RF exposure statements and use conditions are not provided, then the host product manufacturer is required to take responsibility of the module through a change in FCC ID (new application).
Explanation: This module complies with FCC RF radiation exposure limits set forth for an uncontrolled environment, This equipment should be installed and operated with a minimum distance of 20 centimeters between the radiator and your body." This module is designed
to comply with the FCC statement, FCC ID: 2AWY7GWF-KM26.
2.7 Antennas A list of antennas included in the application for certification must be provided in the instructions. For modular transmitters approved as limited modules, all applicable professional installer instructions must be included as part of the information to the host product manufacturer. The antenna list shall also identify the antenna types (monopole, PIFA, dipole, etc. (note that for example an "omni-directional antenna" is not considered to be a specific "antenna type")).

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 2.8 Label and compliance information Grantees are responsible for the continued compliance of their modules to the FCC rules. This includes advising host product manufacturers that they need to provide a physical or e-label stating "Contains FCC ID" with their finished product. See Guidelines for Labeling and User Information for RF Devices KDB Publication 784748. Explanation:The host system using this module, should have label in a visible area indicated the following texts: Contains FCC ID: 2AWY7GWF-KM26
2.9 Information on test modes and additional testing requirements5 Additional guidance for testing host products is given in KDB Publication 996369 D04 Module Integration Guide. Test modes should take into consideration different operational conditions for a stand-alone modular transmitter in a host, as well as for multiple simultaneously transmitting modules or other transmitters in a host product. The grantee should provide information on how to configure test modes for host product evaluation for different operational conditions for a stand-alone modular transmitter in a host, versus with multiple, simultaneously transmitting modules or other transmitters in a host. Grantees can increase the utility of their modular transmitters by providing special means, modes, or instructions that simulates or characterizes a connection by enabling a transmitter. This can greatly simplify a host manufacturer's determination that a module as installed in a host complies with FCC requirements.
Explanation: WiFi Module can increase the utility of our modular transmitters by providing
instructions that simulates or characterizes a connection by enabling a transmitter. 2.10 Additional testing, Part 15 Subpart B disclaimer The grantee should include a statement that the modular transmitter is only FCC authorized for the specific rule parts (i.e., FCC transmitter rules) listed on the grant, and that the host product manufacturer is responsible for compliance to any other FCC rules that apply to the host not covered by the modular transmitter grant of certification. If the grantee markets their product as being Part 15 Subpart B compliant (when it also contains unintentional-radiator digital circuity), then the grantee shall provide a notice stating that the final host product still requires Part 15 Subpart B compliance testing with the modular transmitter installed. Explanation: The module without unintentional-radiator digital circuity, so the module does not require an evaluation by FCC Part 15 Subpart B. The host shoule be evaluated by the FCC Subpart B.