wireless-tag ESP8266 Wifi Module Wireless IoT Board Module User Manual

ESP8266 Wifi Module Wireless IoT Board Module
User Manual

ESP8266 Wifi Module Wireless IoT Board Module

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Note
As th e product upgrade or other reasons, this manual may change. Shenzhen Unique Scales Co.,Ltd
has rig ht to modify the contents of this manual without any no e or warning. This manual is only as a Spareno e ort to provide accurate informa on in this manual, but the can’t guarantee manual there is no problem , all statem ents in this manual, information and sugges ons do not cons tute any guarantee of express or implication.
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Overview

WT8266-S2 Wi-Fi module is a low consump on, high performance Wi-Fi network control module designed . It can meet the IoT applica on requirements in smart power grids, building automa on, security and protec on, smart home, remote health care etc.
The module’s core processor ESP8266integrates an enhanced version of Tensilica’s L106 Diamond series 32- bit processor with smaller package size and 16 bit compact mode, main frequency support 80 MHz and 160 MHz, support RTOS, integrated Wi-Fi MAC / BB / RF / PA / LNA, on-board PCB antenna.
The module supports standard IEEE802.11 b / g / n protocol, a complete TCP / IP protocol stack.it can be used to hostthe application or to offload Wi-Fi networking functions from another application processor.

Main Features

• Opera g Voltage: 3.3V
• Opera g Temperature -40-85°C
• CPU Tensilica L106
  • RAM 50KB Available
  • Flash 16Mbit/32Mbit 16Mbit default
• System
  • 802.11 b/g/n
  • IntegratedTensilica L106 ultra-low power 32-bitmicro MCU, with 16-bit RSIC. The CPU clock speed is 80MHz. It can also reach a maximum value of 160MHz.
  • WIFI 2.4 GHz supportWPA/WPA2
  • Ultra-Small 18.6mm*15.0mm
  • Integrated10 bit high precision ADC
  • IntegratedTCP/IP Stack
  • IntegratedTR switch, balun,LNA, Power ampli er and matching network
  • Integrated PLL, Regulator and power source management components, +20 dBm output power in 802.11b mode
  • Supports antenna diversity
  • Deep sleep current<20uA, Power down leakage current < 5uA
  • Rich interface on processor: SDIO 2.0, (H) SPI, UART, I2C, I2S, IRDA, PWM, GPIO
  • STBC, 1×1 MIMO, 2×1 MIMO, A-MPDU & A-MSDU aggrega on & 0.4s guard interval
  • Wake up ,build the connec on and transmit packets in < 2ms
  • Standby power consump on<1.0mW (DTIM3)
  • Support AT remote upgrades and cloud OTA upgrade
  • Support STA/AP/STA+AP opera on modes

Hardware Specifications

3.1 System Diagram

3.2Pin Description

Table 1 Pin Definition and Description

available at the same me)
14| EN| Chip Enable.
High: On, chip works properly; Low: O , small current
---|---|---
15| IO16| GPIO16; Deep sleep wakeup, by connecting to RST pin
16| IO12| GPIO12;HSPI_MISO
17| IO14| GPIO14;HSPI_CLK
18| GND| GND
19| GND| GND PAD

Note
Table-2 Pin Mode

Table-3 Interface Description

HSPI
Interface| 1012(MISO),1013(MOSI),I 014(CLK),I015(CS)| Can connect external SPI Flash, display and MCU etc.
PWM
Interface| 1012(R),1015(G),1013(B)| The official demo provides4-channel PWM (user can expand to 8-channel ), can be used to control lights, buzzers, relays and motors, etc.
IR Interface| 1014(1R_T),105(IR_R)| The functionality of Infrared remote control interface can be implemented via software programming. NEC coding, modulation, and demodulation are used by this interface. The frequency of modulated carrier signal is 38KHz.
ADC Interface| ADC| ESP8266EX integratesa 10-bit precision SARADC.
ADC IN interface is used to test the power supply voltage of VDD3P3(Pin 3 and Pin 4), as well as the input voltage of TOUT (Pin 6). It can be used in sensors application.
12C Interface| I014(SCL), IO2(SDA)| Can connect to external sensor and display, etc.
UART Interface| UARTO: TX0(UOTXD),RX0(UORXD) , 1015(RTS),I013(CTS) UART1:102(TX0)| Devices with UART interfaces can be connected
Download: UOTXD+UORXD or GPIO2+UORXD Communication:
(UARTO):UOTXD,UORXD,MTDO(UORTS),MTCK(UOCTS)
Debug: UART1_TXD(GPIO2)Can be used to print debugging information
By default, UARTO will output some printed information when the device is powered on and is booting up. If this issue exerts influence on some specific applications, users can exchange the inner pins of UART when initializing, that is to say, exchange UOTXD, UORXD with UORTS, UOCTS.
I2S Interface| I2S input  IO12 (I2SI_DATA); IO13 (I2SI_BCK ); IO14 (I2SI_WS);| Mainly used for audio capturing, processing and transmission.
---|---|---

3.3Electrical Characteristic
3.3.1Maximum Ratings
Table- 4. Maximum Ratings

3.3.2Recommended Opera ng Environment
Table -5 Recommended Opera g Environment

Working Environment| Name| Min Value| Typical Values| Max Value| Unit
---|---|---|---|---|---
Operating Temperature| /| -40| 20| 85| °C
Supply Voltage| VDD| 3.0| 3.3| 3.6| V

3.3.3Digital Port Characteristis
Table -6 Digital Port Characteristis

3.4Power Consumption
3.4.1Opera g Power Consump on
Table -7 Opera g Power Consump on

Note: RX mode data packet length is 1024 bytes;
3.4.2Standby Power Consump on
The following current consumption is based on 3.3V supply and 25°C ambient with internalregulators.Values are measured at antenna port without SAW filter. All the transmissionmeasurements valuesare based on 90% duty cycle, continuous transmission mode.
Table -8 Standby Power Consumption

1. Modem-Sleep requires the CPU to be working, as in PWM or I2S applica ons. According to802.11 standards (like U-APSD), it saves power to shut down the Wi-Fi Modem circuit whilemaintaining a Wi-Fi connec on with no data transmission. E.g. in DTIM3, to maintain a sleep 300mswake 3ms cycle to receive AP’s Beacon packages, the current is about 15mA.
2. During Light-Sleep, the CPU may be suspended in applica ons like Wi-Fi switch. Without datatransmission, the Wi-Fi Modem circuit can be turned o and CPU suspended to save poweraccording to the 802.11 standard (U-APSD). E.g. in DTIM3, to maintain a sleep 300ms-wake 3mscycle to receive AP’s Beacon packages, the current is about 0.9mA.
3. Deep-Sleep does not require Wi-Fi connec on to be maintained. For application with long melags between data transmission, e.g. a temperature sensor that checks the  temperature every 100s,sleep 300s and waking up to connect to the AP (taking about 0.3~1s), the overall average current isless than 1mA.

3.5RF Characteristics
3.5.1RF Con gura on and General Speci ca ons of Wireless LAN
Table-9 RF Con gura on and General Speci ca ons of Wireless LAN

3.5.2 RF Tx Characteristics
Table-10 Emission Characteristics

Mark| Parameters| Condi on| Min Value| Typical Value| Max Value| Unit
---|---|---|---|---|---|---
Ftx| Input Frequency| —| 2.412| —| 2.484| GHz
Pout| Output Power
11b| 1Mbps| —| 19.5| —| dBm
11Mbps| —| 18.5| —| dBm
54Mbps| —| 16| —| dBm
MCS7| —| 14| —| dBm

3.5.3RF Rx Characteristics
Table-11RF Receiving Characteristics

Mark| Parameters| Condi on| Min Value| Typical Value| Max Value| Unit
---|---|---|---|---|---|---
Frx| Input Frequency| —| 2.412| —| 2.484| GHz
Srf| Sensi vity
DSSS| 1 Mbps| —| -98| —| dBm
| 11 Mbps| —| -91| —| dBm
OFDM| 6 Mbps| —| -93| —| dBm
| 54 Mbps| —| -75| —| dBm
HT20| MCS7| —| -71| —| dBm

Mechanical Dimensions

4.1Module Size

|
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4.2 Schematics

Product Trial

• Forum: yangxianwen@lefu.cc

FCC regulatory conformance

This device complies with Part IS of the FCC Rules. Operation is subject to the following two conditions:

1. This device may not cause harmful interference.
2. This device must accept any interference received, including interference that may cause undesired operation.

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

NOTE: The manufacturer is not responsible for any radio or TV interference caused by unauthorized modifications to this equipment. Such modifications could void the user’s authority to operate the equipment.
RF Exposure
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance of 20 cm between the radiator and your body. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. ORIGINAL EQUIPMENT MANUFACTURER (OEM) NOTES
The OEM must certify the final end product to comply with unintentional radiators (FCC Sections 15.107 and 15.109) before declaring compliance of the final product to Part 15 of the FCC rules and regulations. Integration into devices that are directly or indirectly connected to AC lines must add with Class H Permissive Change.
The OEM must comply with the FCC labeling requirements. If the module’s label is not visible when installed, then an additional permanent label must be applied on the outside of the finished product which states: “Contains transmitter module FCC ID: 2AVENESP8266”. Additionally, the following statement should be included on the label and in the final product’s user manual: “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 interferences, and
2. this device must accept any interference received, including interlerence that may cause undesired operation.”

The module is limited to installation in mobile or fixed applications. Separate approval is required for all other operating configurations, including portable configuration with respect to Part 2.1093 and different antenna configurations.
A module or modules can only be used without additional authorizations if they have been tested and granted under the same intended end – use operational conditions, including simultaneous transmission operations. When they have not been tested and granted in this manner, additional testing and/or FCC application filing may be required. The most straightforward approach to address additional testing conditions is to have the grantee responsible for the certification of at least one of the modules submit a permissive change application. When having a module grantee file a permissive change is not practical or feasible, the following guidance provides some additional options for host manufacturers. Integrations using modules where additional testing and/or FCC application filing(s) may be required are: (A) a module used in devices requiring additional RF exposure compliance information (e.g., MPE evaluation or SAR testing); (B) limited and/or split modules not meeting all of the module requirements; and (C) simultaneous transmissions for independent collocated transmitters not previously granted together.
This Module is full modular approval, it is limited to OEM installation ONLY. Integration into devices that are directly or indirectly connected to AC lines must add with Class II Permissive Change. (OEM) Integrator has to assure compliance of the entire end product include the integrated Module. Additional measurements (15B) and/or equipment authorizations (e.g. Verification) may need to be addressed depending on co-location or simultaneous transmission issues if applicable. (OEM) Integrator is reminded to assure that these installation instructions will not be made available to the end user
IC regulatory conformance
This device complies with CAN ICES-003 (B)/NMB-003(B).
This device contains licence-exempt transmitter(s)/receiver(s) that comply with Innovation, Science and Economic Development Canada’s licence-exempt RSS(s). Operation is subject to the following two conditions:

1. This device may not cause interference.
2. This device must accept any interference, including interference that may cause undesired operation of the device.

RF Exposure
This equipment complies with IC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance of 20 cm between the radiator and your body. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.
IC labeling requirement for the final end product:
The final end product must be labeled in a visible area with the following “Contains IC: 28067-ESP8266”
The Host Marketing Name (HMN) must be indicated at any location on the exterior of the host product or product packaging or product literature, which shall be available with the host product or online.
This radio transmitter [ IC: 28067-ESP8266] has been approved by Innovation, Science and Economic Development Canada to operate with the antenna types listed below, with the maximum permissible gain indicated. Antenna types not included in this list that have a gain greater than the maximum gain indicated for any type listed are strictly prohibited for use with this device.
Frequency range Manufacturer Peak gain Impedance Antenna type 2412-2462MHz Runicc 1.56dBi 50 Q FPC Antenna

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).
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 EUT has a FPC Antenna, and the antenna use a permanently attached antenna which is not replaceable.
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 not a limited 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 is: 2AVENESP8266.
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 a FPC Antenna, and the antenna use a permanently attached antenna which is unique.
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: 2AVENESP8266, Contains IC: 28067-ESP8266”
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: Top band 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.

Specification
Version 2.5
2022/4/28

Documents / Resources

| wireless-tag ESP8266 Wifi Module Wireless IoT Board Module [pdf] User Manual
ESP8266 Wifi Module Wireless IoT Board Module, ESP8266, Wifi Module Wireless IoT Board Module, Wireless IoT Board Module, IoT Board Module
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