RINO XY3721-B3C WiFi Bluetooth Module User Guide

RINO XY3721-B3C WiFi Bluetooth Module

Product Information

Product Overview

The XY3721-B3C 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, which can run independently or as a slave in other MCUs. The module can be booted directly from the  built-in Flash when equipped with external applications and is the only application processor in the device. It features low power  consumption, a maximum main frequency of 160MHz, built-in 288KB  RAM, 2Mbyte flash, and rich peripheral resources. The XY3721-B3C  Wi-Fi module supports IEEE 802.11b/g/n protocol standard, BLE5.2,  and lightweight TCP/IP protocol stack. It also supports STA, AP, AP+STA mode, allowing users to add networking power to existing devices or build a separate network controller.

Features

• Supports the 802.11b/g/n/BLE5.2 standard protocol
• 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 frequency +288KB RAM
• Built-in 2Mbit Flash
• Supports remote firmware OTA upgrade, which can be started by  the mobile APP or AT command
• Supports STAAPAP+STA working mode
• Supports WEP/TKIP/WPA/WPA2 security protocol
• Supports 802.11e and WMM/WMM PS protocol
• Supports Smart Link intelligent networking function
• Supports HT20
• Supports 6-way hardware PWM
• Max output power of +16dBm in Wi-Fi 802.11b mode
• Bluetooth Max output power +6dBm
• Voltage range 2.7V~3.6VDC, 3.3V 500mA single power supply is  recommended
• Onboard antenna, compatible with external antennas

Frequently Asked Questions

• Q: What is the voltage range for the module?
  • A: The module supports a voltage range of 2.7V~3.6VDC. It is recommended to use a single power supply of 3.3V with a current rating of 500mA.
• Q: Can I use an external antenna with the module?
  • A: Yes, the module is compatible with external antennas. If you prefer to use an external antenna, you can connect it to the module’s antenna port.
• Q: What are the main application areas for this module?
  • A: The main application areas for this module include smart lighting, smart home, smart sensing, smart office, smart gateway, and smart industry.

Product Overview

XY3721-B3C 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, which can run independently or as a slave in other MCUS.

When the module is equipped with external applications and is the only application processor in the device, it can be booted directly from the built- in Flash; also Contains low power consumption, maximum main frequency 160MHz, built-in 288KB RAM, 2Mbyte flash and rich peripheral resources.

XY3721-B3 WiFi module supports IEEE 802.11b /g/n protocol standard, BLE5.2, and lightweight TCP/IP Protocol stack, and support STA, AP, AP+STA mode. Users can use this module to add networking power to existing devices Can, or can build a separate network controller. 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

• Supports the 802.11b /g/n/BLE5.2 standard protocol
• 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 frequency +288KB RAM
• Built-in 2Mbit Flash
• Supports remote firmware OTA upgrade, which can be started by the mobile APP, AT command
• Support STAAPAP+STA working mode
• Support WEP/TKIP/WPA/WPA2 security protocol
• Support 802.11e and WMM/WMM PS protocol
• Support Smart Link intelligent networking function
• Support HT20
• Supports 6-way hardware PWM
• Max output power of +16dBm in Wi-Fi 802.11b mode
• Bluetooth Max output power +6dBm
• Voltage range 2.7V~3.6VDC, 3.3V 500mA single power supply is recommended
• Onboard antenna, compatible with external antennas

Main application areas

• Smart lighting
• Smart home
• Smart Sensing
• Smart Office
• Smart Gateway
• Smart indus

Module Interface

Dimensional Package

The XY3721-B3C Wi-Fi module has 3 rows of pins, a total of 22, and the pin spacing is 2mm.
XY3721-B3Wi-Fi module size: 16

±0.35mm (W)×24±0.35mm (L) ×3.0±0.15mm(H), where the PCB thickness is 0.8mm± 0.1mm, the package is shown in Figure 2.1:

Pin definition

Pin Serial Number /Symbol / IO type / Features

1

|

RST

|

I

| Hardware reset pin (active low), corresponding to the CEN of the IC
---|---|---|---

2

|

ADC

|

I/O

| ADC port, which can be reused as

ordinary IO, corresponding to the P28 of the IC

3

|

EN

|

I

| Module enable pin, internal pull up

processing, compatible with other module design docking

4

|

P16

|

I/O

| Common I/O port, corresponding to P16 of the IC

5

|

P26

|

I/O

| Ordinary IO port, can do LED driver PWM output, corresponding to IC P26, PWM5

6

|

P24

|

I/O

| Ordinary IO port, can do LED driver PWM output, corresponding to IC P24,PWM4
7| P6| I/O| Ordinary IO port, can do LED drive PWM
 |  |  | output, corresponding to IC P6,PWM0

8

|

VCC

|

P

| Module power supply pin (typical value 3.3V)
9| GND| P| Power reference place

10

|

P9

|

I/O

| Ordinary IO port, can do LED driver PWM output, corresponding to IC P9,PWM3

11

|

TX2

|

I/0

| Common I/O port, configured as UART_TXD2 debug output by default,

corresponding to P0 of the IC

12

|

CSN

|

I/O

| Common I/O port, corresponding to P21 of the IC

13

|

P8

|

I/O

| Ordinary IO port, can do LED drive PWM output, corresponding to IC P8, PWM2

14

|

P7

|

I/O

| Ordinary IO port, can do LED driver PWM output,  corresponding to IC P7,PWM1

15

|

RXD

|

I/O

| Serial port receiving pin UART_RXD1, which can be reused as a common I/O port, corresponding to P10 of the IC

16

|

TXD

|

I/O

| Serial port receiving pin UART_TXD1, which can be reused as a common I/O port, corresponding to P11 of the IC
---|---|---|---
17| P15| I/O| Normal IO port
18| P14| I/O| Normal IO port
19| P22| I/O| Normal IO port
20| P20| I/O| Normal I/O port –

21

|

RX2

|

I/O

| Common I/O port. The default value is  UART_RXD2, which corresponds to P1 of the IC
22| P17| I/O| Normal IO port

Description: VCC stands for power pin, I/O stands for input/output pin, ADC stands for analog input

Electrical parameters

RF output power

Parameters| Minimum value| Typical value| Maximum value| Units
---|---|---|---|---
Working frequency Wi-Fi| 2412|  | 2462| MHz
Operating frequency BLE| 2402|  | 2480| MHz
Input impedance|  | 50|  | ****

Ω

RX receiving sensitivity

Parameters| Minimum value| Typical value| Maximum value| Units
---|---|---|---|---
Sensitivity (802.11b@11Mbps,CCK)|  | – 88.|  | dBm
Sensitivity (802.11g@54Mbps,OFDM)|  | – 75.|  | dBm
Sensitivity (802.11n@HT20,MCS7)|  | – 72.|  | dBm
Sensitivity (BLE@1M)|  | – 92.|  | dBm

Transmit power

Parameters| Minimum value| Typical value| Maximum value| Units
---|---|---|---|---
Power output (802.11b@11Mbps)|  |  | ****

17.19

| dBm
BLE output power (802.11g@54Mbps)|  |  | 16.89| dBm
Output power (802.11n@HT20,MCS7)|  |  | 15.42| dBm
Output power (BLE@1M)|  |  | 3.37| dBm

Power consumption

The following power consumption data are measured data under 3.3V power supply

Working state| Mode| Rate| Launch work Rate/reception| Average| Peaks (typical values)| Units
---|---|---|---|---|---|---
send|

802.11 b

|

11Mbps

|

16dBm

|

81

|

270

|

mA

Launch|

802.11 g

|

54Mbps

|

15dBm

|

82

|

260

|

mA

Launch|

802.11 n

|

MCS7

|

14dBm

|

85

|

253

|

mA

Receiving|

802.11 b

|

11Mbps

| Continuo us  reception|

73

|

73

|

mA

Receiving|

802.11 g

|

54Mbps

| Continuo us  reception|

75

|

75

|

mA

Receiving|

802.11 n

|

MCS7

| Continuo us  reception|

75

|

75

|

mA

Antenna Information

Antenna Types

• The XY3721-B3C Bluetooth module uses an onboard PCB antenna or IPX antenna interface

Reduce antenna interference

• To ensure optimal RF performance, it is recommended to keep the distance between the antenna part of the module and other metal parts at least 15mm. If using the environment.
• The antenna is surrounded by metal materials, which greatly attenuates the wireless signal and deteriorates the RF performance. Since the module is installed as a plug-in,  Be careful to leave enough space for the antenna area.

Module Package

Top view:

Note: The default module external dimension tolerance is ±0.35mm, the key 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 shown in the package library.

Recommend the furnace

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

Appendix

Appendix: Schematic diagram

Module MOQ with packaging information

Product Model number| MOQ (PCS)| Shipping packing method| Quantity of shipping packaging| Number of packaging rolls per box
---|---|---|---|---
XY3721-B3C| 3600| Carry tape reels| 900| 4

FCC STATEMENTS

8 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 2.54dBi 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 asessment 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 that integrates this module. The end user manual shall include all required regulatory information / waming 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 microstrip 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 this circumstance, the host manufacturer will be responsible for evaluating the end product ( including the transmier ) and obtaining a separate FCC authorization.

Antennas: Antenna Specification are as follows :

• Type: PCB Antenna
• Gain: 2.54dBi Max

This device is intended only for host manufacturers under the following conditions:The module shall be only used with the internal antennas ) that has been originally tested and certified with this module . The antenna must be either permanently attached or employ 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-B3C with their finished product.

Information on the modes and additional testing requirements

Host Manacor ms pa orm s  of aiad & oced mission and spurious emission a in ac test modes for a stand – alone modular transmiter host, as well as for multi silenus 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 cerification.

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 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 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 canradiate 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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