RINO XY3721-C Wi-Fi Module User Guide

RINO XY3721-C Wi-Fi Module

Product Information

Specifications

• Model: XY3721-B2C
• Output Power: 13.13dBm
• Receiving Sensitivity: 9.97dBm
• Compliance: FCC Part 15.212

Product Usage Instructions

Module Procedures
The module is a single module and complies with FCC Part 15.212 requirements.

Antenna
The module has its own antenna and does not require additional components like host sprinted board microstrip trace antennas.

Compliance Information
Host product manufacturers must provide a physical or e-label stating “Contains FCC ID: 2A9TO-XY3721-C” with their finished product.

Testing Requirements
Ensure that all test results comply with FCC requirements before legally selling the end product.

Additional Testing Disclaimer

• The modular transmitter is FCC authorized for FCC Part 15 Subpart C 15.247 & 15.209. Host product manufacturers are responsible for compliance with other FCC rules that apply to the host.
• If the product contains unintentional radiator digital circuitry, compliance testing is required.

Caution
Any changes or modifications not approved may void the user’s authority to operate the equipment.

FAQ

• Q: Do I need to perform additional testing on the module?
  A: Yes, ensure all test results comply with FCC requirements before selling the end product legally.

• Q: What happens if I do not comply with FCC regulations?
  A: Non-compliance may result in voiding the user’s authority to operate the equipment.

Wi-Fi module (XY3721-B2C) specifications
User’s Guide

Version updated 2024-4-23
Confidential, not for distribution without written permission from Rin
Version 1.0

Product Overview

XY3721_B2C is a low-power embedded Wi-Fi module developed by Shenzhen Xiyun Technology Co., LTD. It is equipped with Bluetooth 5.2 and Wi-Fi 802.11nA chips, and it can run independently or as a slave to other MCUS. When the module is equipped with external applications and serves as the only application processor in the device, it can be directly launched from the built-in Flash. It also contains low power consumption, up to 160MHz main frequency, built-in 288KB RAM, 2Mbyte flash and rich peripheral resources.
XY3721_B2C WiFi module supports IEEE 802.11b /g/n protocol standard, BLE5.2, lightweight TCP/IP protocol stack, and supports STA, AP, AP+STA modes. Users can use the module to add networking capabilities to existing devices or to build standalone network controllers. To provide customers with a complete hardware, software reference scheme, in order to shorten your product development cycle, for you to save cost investment.

Features

Confidential, not for distribution without written permission from Rin
Version 1.0

• Supports 802.11b/g/n/BLE5.2 standard protocols
• Built-in lightweight TCP/IP protocol stack
• Built-in TR switch, Balun, LNA, PA, and integrated onboard antenna (compatible with external antenna)
• MCU up to 160M clock rate + 288KB RAM
• Built-in 2Mbit Flash > Support remote firmware OTA upgrade, upgrade can be started through the mobile APP, AT command
• Support STAAPAP+STA working mode
• Supports WEP/TKIP/WPA/WPA2 security protocols
• Supports 802.11e and WMM/WMM PS protocols
• Supports Smart Link intelligent networking
• Support HT20
• Supports six hardware PWM channels
• Max output power of 13.13dBm in Wi-Fi 802.11b mode
• Bluetooth maximum output power 9.97d8m
• The voltage ranges from 2.7V to 3.6VDC. It is recommended to use 3.3V 500mA single power supply
• Onboard antenna

Main application field

• Intelligent lighting
• Smart home.
• Intelligent sensing > Smart office
• Intelligent gateway
• Intelligent industry

Module interface

Dimensional Package
The XY3721_B2C Wi-Fi module has 2 rows of pins, totaling 11 pins with a 2mm pin spacing. XY3721_B2C Wi-Fi module size: 15 0.35mm (W) ×17.95 $0.35mm (L)x 3.0$ 0.1mm(H), PCB thickness 0.8mm 0.1mm, package as shown below:

Pin definition

Description: VCC indicates the power supply pin, I/O indicates the input/output pin, ADC indicates the analog input

Electrical parameter

RF Output power

RX receiving sensitivity

Transmitting power

Power dissipation
The following power consumption data are measured data under 3.3V power supply condition :

Antenna information

Antenna type
The XY3721_B2C Bluetooth module uses an onboard PCB antenna

Reduce antenna interference
To ensure optimal RF performance, it is recommended that the distance between the antenna part of the module and other metal parts be at least 15mm. If metal materials are used around the antenna in the environment, the wireless signal will be greatly attenuated, and the RF performance will be deteriorated. Because the module is installed as a plug-in, be sure to reserve enough space for the antenna area.

 Module encapsulation

Top view
Note: The default module dimension tolerance is 0.35mm, and the critical dimension tolerance is $0.1mm
The circular pad in the left center of the module is the RF test point of the module, and this part of the pad is not drawn in the package library.

Recommended the furnace

Please apply the SMT patch according to the reflow soldering curve. The peak temperature is 245°C, and the reflow soldering temperature curve is shown in the figure below: : Refer to IPC/JEDEC standard; Peak Temperature:<250°C ; Number of Times: ≤2 times

Module MOQ with packaging information

List of applicable FCC rules FCC Part 15 Subpart C 15.247 &15.209

• Specific operational use conditions.
• The module can be used for mobile applications with a maximum 0.13dBi antenna. The manufacturer installing this module into their product must ensure that the final compos it product complies with the FCC requirements by a technical assessment or evaluation to the FCC rules , including the transmitter operation . The host manufacturer has to be aware not to provide information to the end user regarding how to install or remove this RF module in the users manual of the end product which integrates this module . The end user manual shall include all required regulatory information / warming as show in this manual.
• Limited module procedures. Not applicable.
• The module is a Single module and complies with the requirement of FCC part 15.212.
• Trace antenna designs .Not applicable .
• The module as its ow antenna,and doesn’t need a host sprinted board micros trip trace antenna etc
• RF exposure considerations.
• The module must be installed in the host equipment such that at least 20cm is maintained between the antenna and users ” body,and if RF exposure statement or module layout is changed , then the host product manufacturer required to take responsibility of the module through a change in FCC ID or new application . The FCC ID of the module cannot be used on the final product In these circumstance , the host manufacturer will be responsible for evaluating the end product ( including the transmitter ) and obtaining a separate FCC authorization

Antennas:Antenna Specification are as follows
Ty p e : PCB Antenna
Gain : 0.13dBi Max
This device is intended only for host manufacturers under the following conditions:The module shall be only used with the PCB antennas ) that has been originally tested and certified with this module . The antenna must be either permanently attached or employ a unique antenna coupler.As long as the conditions above are met , further transmitter test will not be required However , the host manufacturer is still responsible for testing their end- product for any additional compliance requirements required with his module installed for example , digital device emissions , PC peripheral requirements , etc : )

Label and compliance information
Host product manufacturers need to provide a physical or e-label stating ” Contains FCC
ID:2A9TO-XY3721-C with their finished product.
Information on the modes and additional testing requirements Host manacor mspaorms of aiad & oced mission and spurious emission a in ac test modes for a stand-along modular transmitter inhost , as well as for multi silanus ramming modules or other transmitters in a host product.Only when all the test results of test modes comply with FCC requirements , then the end product can be sold legally.
Additional testing,Part 15 subpart B disclaimer.The modular transmitter is only FCC authorized for FCC Part 15 Subpart C 15.247 & 15. 209 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 art 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 art 15 Subpart B compliance testing

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

This device complies with Part 15 of the FCC Rules. Operation is subject to the followingtwo 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.

Note: This equipment has been tested and found to comply with the limits for a 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 a minimum distance of 20cm between the radiator & your body. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.

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