K-tronics WXT28M2111 2R Plus Bluetooth V2.1 Module User Guide

K-Tronics WXT28M2111 2R Plus Bluetooth V2.1 Module

Product Specifications

• Version: 1.0
• IEEE: 802.11 a/b/g/n/ac/ax 2T/2R+ Bluetooth V2.1/4.2/5.2 USB2.0/3.0 Module
• Model Number: WXT28M2111 (MediaTek MT7921AU)
• Design Date: 2023-09-08

Product Information

• The WXT28M2111 is a wireless module that supports IEEE 802.11 standards and Bluetooth connectivity. It offers seamless roaming, full interoperability, and advanced security features like the WEP standard.
• The module ensures interoperability with different vendors’ access points through wireless LAN.

Usage Instructions

Installation and Operation

• This equipment must be installed and operated following the provided instructions. The antenna(s) used with this transmitter should be installed to maintain a separation distance of at least 20 cm from all persons.
• Avoid co-locating or operating the antenna with any other transmitter.

Features Overview

The module supports IEEE 802.11 standards including a/b/g/n/ac/ax, and Bluetooth versions 2.1, 4.2, and 5.2. It also features USB 2.0/3.0 connectivity.

Functional Block Diagram

• Standard: IEEE 802.11b
• Radio and Modulation Schemes: DQPSK, DBPSK, and CCK with DS
• Operating Frequency: 2400 – 2483.5MHz ISM band
• Channel Numbers: 13 channels for Worldwide
• Data Rate: Up to 11Mbps
• Media Access Protocol: CSMA/CA with ACK
• Transmitter Output Power: Typical RF Output Power at each RF chain, and room Temp. 25

Frequently Asked Questions

Q: What is the maximum separation distance recommended for the antenna(s) used with this transmitter?

A: A separation distance of at least 20 cm from all persons is recommended for the antenna(s) used with this transmitter.

Q: What standards does the WXT28M2111 module support?

A: The WXT28M2111 module supports IEEE 802.11 a/b/g/n/ac/ax standards and Bluetooth versions V2.1/4.2/5.2.

IEEE 802.11 a/b/g/n/ac/ax 2T/2R+ Bluetooth V2.1/4.2/5.2 USB2.0/3.0 Module

• Model Number: WXT28M2111
• (MediaTek: MT7921AU )

Custom Approval Section

Custom Name|
Department|
Approval| | Date：
DESIGN| CHECK| APPROVAL
---|---|---
2023-09-08| 2023-09-08| 2023-09-08

Document revision history

General Description

This document is to specify the product requirements for 802.11a/b/g/n/ac/ax and Bluetooth USB Module. This Card is based on the MediaTek MT7921 chipset. It is a complete dual-band(2.4GHz and 5GHz)WIFI 2 ×2 MIMO MAC/PHY/Radio System-on-a-Chip. This module provides a high level of integration with dual- stream IEEE 802.11ax MAC/baseband/radio. The WLAN operation supports 20MHz,40MHz, and 80MHz channels for data rates up to 1201Mbps. It is also backward complied with IEEE 802.11a standard from 5.15~5.825GHz wideband and IEEE 802.11b/g standard from 2.4~2.5GHz. It can be used to provide up to 54Mbps for IEEE 802.11a and IEEE 802.11g, 11Mbps for IEEE 802.11b, and 300Mbps for IEEE 802.11n. The Bluetooth part supports the latest 5.2.
With seamless roaming, full interoperability, and advanced security with WEP standard, 802.11 a/b/g/n/ac USB2.0 Module offers absolute interoperability with different vendors 802.11a/b/g/n/ac. Access Points through the wireless LAN.

Features

• Compatible with IEEE 802.11a standard to provide wireless 54Mbps data rate
• Compatible with IEEE 802.11b standard to provide wireless 11Mbps data rate
• Compatible with IEEE 802.11g standard to provide wireless 54Mbps data rate
• Compatible with IEEE 802.11n standard to provide wireless 300Mbps data rate
• Compatible with IEEE 802.11ac standard to provide wireless 866.7Mbps date rate.
• Compatible with IEEE 802.11ax standard to provide wireless 1201Mbps data rate.
• Operation at 2.4~2.5GHz and 5.15~5.825GHz frequency bands to meet worldwide regulations.
• Support MU-MIMO RX.
• Bluetooth specification 2.1+EDR
• Bluetooth 5.2 Low Energy (LE)
• IEEE 802.11 d/e/h/i/j/k/mc/r/v/w support
• Security support for WFA WPA/WPA2/WPA3 personal, WPS2.0, WAPI
• Drivers support Win10,Win8,Win7,XP,Linux
• High-speed  USB 2.0 interface
• High-speed  USB 3.0 interface
• HSF compliant

Application Diagrams

Functional Block Diagram

General Requirements

IEEE 802.11b Section

| Feature| Detailed Description
---|---|---
3.2.1.1| Standard| ●       IEEE 802.11b
3.2.1.2| Radio and Modulation Schemes| ●       DQPSK, DBPSK, and CCK with DS
3.2.1.3| Operating Frequency| ●       2400 ～ 2483.5MHz ISM band
3.2.1.4| Channel Numbers| ●       13 channels for Worldwide
3.2.1.5| Data Rate| ●       at most 11Mbps
3.2.1.6| Media Access Protocol| ●       CSMA/CA with ACK
3.2.1.7| Transmitter Output Power at Antenna Connector| ●       Typical RF Output Power at each RF chain, and room Temp. 25℃

●       14±2 dBm at 11Mbps

__ 3.2.1.8| Receiver Sensitivity at Antenna Connector| ●     Typical Sensitivity at each RF chain. @Frame (1000-byte PDUs) Error Rate<8% at room Temp 25℃

●       -83 dBm for 11Mbps

IEEE 802.11g Section

| Feature| Detailed Description
---|---|---
3.2.2.1| Standard| ●       IEEE 802.11g
3.2.2.2| Radio and Modulation Type| ●       QPSK , BPSK , 16QAM ,64QAM with OFDM
3.2.2.3| Operating Frequency| ●       2400 ～ 2483.5MHz ISM band
3.2.2.4| Channel Numbers| ●       13 channels for Worldwide
3.2.2.5| Data Rate| ●       at most 54Mbps
3.2.2.6| Media Access Protocol| ●       CSMA/CA with ACK
__ 3.2.2.7| Transmitter Output Power at Antenna Connector| ●         Typical RF Output Power at each RF chain, at room Temp. 25℃

●          14±2 dBm at 54Mbps

__ 3.2.2.8| Receiver Sensitivity

at Antenna Connector

| ●     Typical Sensitivity at each RF chain. @Frame (1000-byte PDUs) Error Rate<10% at room Temp 25℃

●       -71 dBm for 54Mbps

IEEE 802.11a Section

| Feature| Detailed Description
---|---|---
3.2.3.1| Standard| ●       IEEE 802.11a
3.2.3.2| Radio and Modulation Type| ●       QPSK , BPSK , 16QAM ,64QAM with OFDM
3.2.3.3| Operating Frequency| ●        5.15~5.25GHz

●        5.25~5.35GHz

●        5.47~5.725GHz

●        5.725~5.825GHz

3.2.3.4| Data Rate| ●       at most 54Mbps
3.2.3.5| Media Access Protocol| ●       CSMA/CA with ACK
__ 3.2.3.6| Transmitter Output

Power at the Antenna Connector

| ●     Typical RF Output Power at each RF chain, at room Temp. 25℃

●          14±2 dBm at 54Mbps

__ 3.2.3.7| Receiver Sensitivity at Antenna Connector| ●     Typical Sensitivity at each RF chain. @Frame (1000-byte PDUs) Error Rate<10% at room Temp 25℃

●       -71 dBm for 54Mbps

| |

IEEE 802.11n Section

| Feature| Detailed Description
---|---|---
3.2.4.1| Standard| ●    IEEE 802.11n
3.2.4.2| Radio and Modulation Type| ●    BPSK , QPSK , 16QAM ,64QAM with OFDM
3.2.4.3| Operating Frequency| ●    2.4GHz :2400 ~ 2483.5MHz for ISM band

5GHz : 5.15~5.25GHz；5.25~5.35GHz；

5.47~5.725GHz；5.725~5.825GHz；

3.2.4.4| Data Rate| at most 300 Mbps
3.2.4.5| Media Access Protocol| __

●        CSMA/CA with ACK

3.2.4.6| Transmitter Output Power at Antenna Connector| ●        Typical RF Output Power at each RF chain, and roomTemp. 25℃
●      2.4GHz Band/HT20 14±2dBm at MCS7| ●      2.4GHz Band/HT40 14±2dBm at MCS7
●      5GHz Band/HT20 14±2dBm at MCS7| ●      5GHz Band/HT40 14±2dBm at MCS7
3.2.4.7| Receiver Sensitivity at Antenna Connector| Typical Sensitivity at each RF chain. @Frame(1000-byte PDUs)Error Rate=10% and at room Temp. 25℃
2.4GHz Band/HT20

● -68dBm at MCS7

| 2.4GHz Band/HT40

●  -66dBm at MCS7

5GHz Band/HT20

●  -68dBmat MCS7

| 5GHz Band/HT40

●  -66dBm at MCS7

IEEE 802.11ac Section

| Feature| Detailed Description
---|---|---
3.2.5.1| Standard| ●       IEEE 802.11ac
3.2.5.2| Radio and Modulation Type| ●       QPSK , BPSK , 16QAM ,64QAM,256QAM with OFDM
3.2.5.3| Operating Frequency| ●       5GHz : 5.15~5.25GHz； 5.25~5.35GHz； 5.47~5.725GHz；5.725~5.825GHz；
3.2.5.4| Data Rate| ●       at most 866.7 Mbps
3.2.5.5| Media Access Protocol| ●       CSMA/CA with ACK
3.2.5.6| Transmitter Output Power at Antenna

Connector

| ●          Typical RF Output Power at each RF chain, at room Temp. 25℃

●          13±2dBm HT80 at MCS9

3.2.5.7| __ Receiver Sensitivity at Antenna Connector| Typical Sensitivity at each RF chain. @Frame(1000-byte PDUs)Error Rate<10% at room Temp    25℃
| 5GHz Band / HT20

●       -64dBm at MCS8

| 5GHz Band / HT40

●       -58dBm at MCS9

|
5GHz Band / HT80

●       -55dBm at MCS9

| |

IEEE 802.11ax Section

| Feature| Detailed Description
---|---|---
3.2.6.1| Standard| ●       IEEE 802.11ax
3.2.6.2| Radio and Modulation Type| ●       QPSK , BPSK , 16QAM ,64QAM,256QAM, 1024QAM
3.2.6.3| Operating Frequency| ●       2G: 2400 ～ 2483.5MHz ISM band

●       5GHz : 5.15~5.25GHz； 5.25~5.35GHz； 5.47~5.725GHz；5.725~5.825GHz；

3.2.6.4| Data Rate| ●     2.4G: at most 573.5 Mbps

●     5G: at most 1201 Mbps

3.2.6.5| Media Access Protocol| ●       CSMA/CA with ACK
3.2.6.6| Transmitter Output Power at Antenna Connector| ●          Typical RF Output Power at each RF chain, at room Temp. 25℃

●          11±2dBm HT80 at MCS11

3.2.6.7| Receiver Sensitivity at Antenna Connector| Typical Sensitivity at each RF chain. @Frame(1000-byte PDUs)Error Rate<10% at room Temp    25℃
| 2GHz Band / HT20

●       -57dBm at MCS11

| 2GHz Band / HT40

●       -55dBm at MCS11

|
| |
5GHz Band / HT20

●       -57dBm at MCS11

| 5GHz Band / HT40

●       -55dBm at MCS11

|
5GHz Band / HT80

●       -53dBm at MCS11

| |

Bluetooth Section

General specification
Bluetooth standard| Bluetooth V2.1/3.0/4.2/5.2
Frequency band| 2402MHz-2480MHz
Channel Numbers| 79 channels for BDR+EDR 40 channels for BLE
Modulation| GFSK, π/4-DQPSK and 8DPSK
RF specification
| Min（dBm）| Type（dBm）| Max（dBm）
BDROutput Power| | 7|
BLE Output Power| | 5|
Sensitive @BER=0.1% FOR GFSK(1Mbps)| | -86|
Sensitive @BER=0.01% FOR π/4-DQPSK(2Mbps)| | -86|
Sensitive @BER=0.01% FOR 8DPSK(3Mbps)| | -80|
Maximum input level| GFSK(1Mbps)   -20dBm
π/4-DQPSK(2Mbps) -20dBm
8DQPSK(3Mbps) -20dBm
Sensitive @PER=30.8% FOR BLE| | -90|

Electrical and Thermal Characteristics

Temperature Limit Ratings

General Section

| Feature| Detailed Description
---|---|---
4.2.1| Antenna Type| ●       WIFI&BT:IPEX connector
4.2.2| Operating Voltage| ●       5V±10%
4.2.3| Current Consumption| ●       ＜300mA@RX

●       ＜2000mA@TX

4.2.4| Form Factor and Interface| ●       High Speed USB3.0/USB2.0 Interface

Software

EEPROM Information BT

WiFi

Reg Domain| Worldwide 2.4G/5G Read from the registry Control by the driver
---|---
——
Vendor ID| 0E8D
Product ID| 7961

DC Characteristics

Mechanical Dimensions

PRODUCTS SPECIFICATION

Size error range:

Product picture

Component preparation

Interface Timing Specification

Appendix 1 SMT connector

FCC Statements

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
2. this device must accept any interference received, including interference that may cause undesired operation.

Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.

FCC Radiation Exposure Statement

The modular can be installed or integrated in mobile or fixed devices only. This modular cannot be installed in any portable device, for example, USB dongle-like transmitters are forbidden. This modular complies with FCC RF 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. This modular must be installed and operated with a minimum distance of 20 cm between the radiator and the user body. If the FCC identification number is not visible when the module is installed inside another device, then the outside of the device into which the module is installed must also display a label referring to the enclosed module. This exterior label can use wording such as the following: “Contains Transmitter Module FCC ID: 2A769-WXT28M2111 Or Contains FCC ID: 2A769-WXT28M2111” When the module is installed inside another device, the user manual of this device must contain the below warning statements.

1. This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
2. This device may not cause harmful interference.
3. This device must accept any interference received, including interference that may cause undesired operation.
4. Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.

The devices must be installed and used in strict accordance with the manufacturer’s instructions as described in the user documentation that comes with the product.
The host product manufacturer is responsible for compliance with any other FCC rules that apply to the host not covered by the modular transmitter grant of certification.
The final host product still requires Part 15 Subpart B compliance testing with the modular transmitter installed.
The end user manual shall include all required regulatory information/warnings as shown in this manual, including.
This product must be installed and operated with a minimum distance of 20 cm between the radiator and the user body.

RF exposure warning

This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment must be installed and operated per provided instructions and the antenna(s) used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter.

• HUIZHOU GAOSHENGDA TECHNOLOGY CO.,LTD
• No. 2, Jinda Road, Huinan Science and Technology Park, Shandong Town, Huizhou City, Guangdong Province
• No. 2 Jinda Road, Sandong Town, HUIZHOU, CHINA
• TEL: 07522096932
• E-mail: zhaoc@gaosd.com

Documents / Resources

| K-tronics WXT28M2111 2R Plus Bluetooth V2.1 Module [pdf] User Guide
WXT28M2111, 2A769-WXT28M2111, WXT28M2111 2R Plus Bluetooth V2.1 Module, WXT28M2111, 2R Plus Bluetooth V2.1 Module, Bluetooth V2.1 Module, Module
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