A: Depending on your device’s capabilities and software support,
you may be able to use multiple modules simultaneously. Refer to
the user manual or contact support for guidance.

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63(&,)&$7,21

CDI-W30721DM
Dual band WiFi4+BLE5.0 Module Spec
(UART, 1 antenna type,with shielding)

Software
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Version

Date

1.0

2025.03.10

1.1

2025.03.20

1.2

2025.04.12

1.3

2025.05.26

Wi-Fi Module CDI-W30721DM
Modification First release Revise PIN definitionPIN19
Update power parameter(2.4G 11g/ BLE) Update module photo (Add Laser Marking information)

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1.Overview

Wi-Fi Module CDI-W30721DM

CDI-W30721DM be based on RTL8721DM-VA1 designed moduleit is a highly integrated single-chip low power dual bands (2.4GHz and 5GHz) Wireles LAN (WLAN) and Bluetooth Low Energy (BLE 5.0communication controller.
There are also audio codec, Key-Scan and touch kevs integrated into this lC Besides, High speed connectivity interfaces,flexible design configures GPlO to different functions according to applications.

2.Features
Wi-Fi 802.11 a/b/g/n 1×12.4GHz &5GHz Supports 20MHz/40MHz up to MCS7 Internal PTA interface for arbitrating data transmission between Wi-Fi and internal
Bluetooth or external 2.4G devices Both central and peripheral modes BLE 5.0 Low power beacon listen mode

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3.General Specification

Wi-Fi Module CDI-W30721DM

Model Product Name Major Chipset
Standard Frequency Band
Interface Operating Temperature Storage Temperature
Humidity Dimension

CDI-W30721DM WLAN 802.11 a/b/g/n+BLE5.0 Module Spec
RTL8721DM-VA1-CG 802.11 a/b/g/n
Dual band 2.4GHz&5GHz ISM UART
-10~ 70°C ambient temperature -55 ~ 125°C ambient temperature 5% to 90 % maximum (non-condensing) 33.0×20.5 x3.0(L*W*H) ±0.2mm

RF Specification

2.4GHz RF Specification

Feature
WLAN Standard Receive Sensitivity
11b@8%PER Receive Sensitivity
11g@10%PER Receive Sensitivity
11n@10%PER

Description
IEEE 802.11b/g/n WiFi compliant 11Mbps PER @ -83dBm
54Mbps PER @ -71dBm
MCS7 PER @ -68dBm

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Wi-Fi Module CDI-W30721DM

5GHz RF Specification

Feature
WLAN Standard Receive Sensitivity
11a@10%PER Receive Sensitivity
11n@10%PER

Description
IEEE 802.11a/n WiFi compliant
54Mbps PER @ -71dBm MCS7 PER @ -68dBm

BLE RF Specification

Feature
WLAN Standard
Receive Sensitivity @BER=1% FOR
GFSK(1Mbps) Receive Sensitivity @PER=30.8% FOR
BLE

BLE5.0 1M/2Mbps PER @ -86dBm PER @ -90dBm

Description

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4.Electrical Characteristics

Wi-Fi Module CDI-W30721DM

symbol

Parameter

Minimum

VBAT/VDD 3.3V supply voltage 2.97

VBAT/VDD

current

—

Typical 3.3 —

Maximum 3.63 500

Units V mA

4.1 Power-on or Resuming from Deepsleep Sequence

Shutdown Sequence

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Wi-Fi Module CDI-W30721DM
5.Pin Description& Dimensions (unit: mm)

Name

Description

GND

Ground connections

PA12

General purpose input/output,can be use application Tx port

PA13

General purpose input/output,can be use application Rx port

PA14

General purpose input/output

PA15

General purpose input/output

PA27

General purpose input/output

PA30

General purpose input/output

GND

Ground connections

VD1833

Main power source input(+3.3V)

GND

Ground connections

PA28

External reference resistor for USB analog, 1% accuracy

GND

Ground connections

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Wi-Fi Module CDI-W30721DM

PA26

USB differential bus

PA25

USB differential bus

GND

Ground connections

PB1

General purpose input/output

PB2

General purpose input/output

PB3

General purpose input/output

PB13

FLASH SPI CLK

PB14

FLASH SPI Data Input (Data Input Output 0)

PB16

FLASH Chip Select Input

PB17

FLASH SPI Data Input (Data Input Output 1)

SPI_WP

FLASH Write Protect Input

GND

Ground connections

PB22

General purpose input/output

PB23

General purpose input/output

GND

Ground connections

CHIP-EN

CHIP-EN(default pull-up,pull-down reset)

GND

Ground connections

PA8

UART_LOG_RXUART_DOWLOAD

PA7

UART_LOG_TXUART_DOWLOAD

GND

Ground connections

GND

Ground connections

Download : UART_LOG_RXUART_LOG_TX (TX ground before power-on

When downloading software, run it first and then power on the module

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6.Supplier
Name of material Crystal Duplexer Inductor WiFi chip
Capacitance FLASH Switch PCB

Wi-Fi Module CDI-W30721DM
9[VVROKXROYZ
Material brand FJ /JWT /KYX /TKD ACX/Walsin/GLEAD/TDK/ Sunlord/FTR Sunlord/CHILISIN/SAMWHA/TDK/MuRata/INPAQ
Realtek SAMSUNG /EYANG/ WALSIN/ MuRata/TAIYO/ Darfon
MXIC/Winbond/ZBIT/Fudan/GigaDevice Maxscend/RichWave/GSR
Bomin/Kexiang/Sunlord/Taijing

7.Physical photo

PIN1

PIN33

PIN1

PIN10

PIN11

PIN33

PIN23

PIN24 PIN24

PIN23

PIN10 PIN11

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8.Warpage

Wi-Fi Module CDI-W30721DM

Warpage (Clearance) Inspection Standard: 0.1mm , gap0.1mm Place the module on a horizontal marble surface, and use a 0.1mm-thick feeler gauge to measure the clearance between the bottom of the module and the marble. The requirement is that the gap 0.1mm.
9.Baking & storage temperature & Recommended
Reflow Profile
9.1 Baking & storage temperature
A. Storage life12 months. Storage conditions:<40. Relative humidity:<90%R.H. (12<40<90%R.H.)
B. After this bag is opened , devices that will be subjected to infrared reflow, vapor-phase reflow, or equivalent processing must be .(SMT )
a. Check the humidity card :stored at 20%RH.If :30%~40%(pink)or greater than 40%(red).Labeling module has moisture absorption.( 30%30%~40%( 40%.)
b. Mounted within 168 hours at factory conditions of: t30%60%R.H. (30%60%R.H, 168) c. Once opened, the workshop the preservation of life for168 hours. (168.) C. Module apart packing after 168 hoursIf baking is required, devices may be baked for. (168) a. Modules must be to remove module moisture problem. (.) b. Baking temperature: 40±5, 120 hours. (40±5120). c. After baking, put proper amount of desiccant to seal packages.
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D.Module reel packaging items as follows:
a. Storage life: 12 months. Storage conditions:<40.Relative humidity:<90%R.H. 5+
EModule apart packing after 168 hours , To launch patch need to bake, to move the module hygroscopic, baking temperature conditions: 125 , 8hours.
F
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Wi-Fi Module CDI-W30721DM
d. The actual number of module reel packing which is based on the actual number of packages to the
customer requirements .
E. Module pallet packaging items as follows:
D Storage life: 3 months. Storage conditions:<40. Relative humidity:<90%R.H. E 5+ F 0RGXOHLIQRWXVHGZLWKLQKRXUVEHIRUHODXQFKWKHQHHGIRUEDNLQJEDNLQJ
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9.2 Recommended Reflow Profile
Referred IPC/JEDEC standard. Peak Temperature : <250°C Number of Times : 2 times

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10. Packing information

Wi-Fi Module CDI-W30721DM

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Vacuum

AL Bag anti-static
AL BAG ANTI-STATIC

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The CDI-W30721DM is ESD (electrostatic discharge) sensitive device and may be damaged with ESD or spike voltage. Although CDI-W30721DM is with built-in ESD protection circuitry, please handle with care to avoid the permanent malfunction or the performance degradation.
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Wi-Fi Module CDI-W30721DM

11. Appendix

Module integration Description

Integration instructions for host product manufacturers according to 996369 D03 OEM Manual v01r01

Manual v01

1.1 List of applicable FCC rules

CFR 47 FCC PART 15 SUBPART C&E has been investigated. It is applicable to the modular.

1.2 Specific operational use conditions

This module is stand-alone modular. If the end product will involve the Multiple simultaneously

transmitting condition or different operational conditions for astand-alone modular transmitter in a host,

host manufacturer have to consult with module manufacturer for the installation method in end system.

1.3 Limited module procedures

Not applicable

1.4 Trace antenna designs

Not applicable

1.5 RF exposure considerations

To maintain compliance with FCC’s RF Exposure guidelines, This equipment should be installed and

operated with minimum distance of 20cm from your body.

1.6 Antennas

This radio transmitter FCC ID:2BFLD-W30721DM has been approved by Federal Communications

Commission 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.

Antenna Type

Maximum antenna gain

PCB

BLE:1.68dBi

2.4G WiFi:1.68dBi

5.2G WiFi:1.95dBi

5.3G WiFi:1.93dBi

5.6G WiFi:3.24dBi

5.8G WiFi:3.24dBi

1.7 Label and compliance information

The final end product must be labeled in a visible area with the following” Contains

FCC ID:2BFLD-W30721DM”

1.8 Information on test modes and additional testing requirements

Host manufacturer is strongly recommended to confirm compliance with FCC requirements for the

transmitter when the module is installed in the host.

1.9 Additional testing, Part 15 Subpart B disclaimer

Host manufacturer is responsible for compliance of the host system with module installed with all other

applicable requirements for the system such as Part 15 B

This device is intended only for OEM integrators under the following condition: The transmitter module may not be co-located with any other transmitter or antenna. As long as the condition above is met, further transmitter test will not be required. However, the OEM integrator is still

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Wi-Fi Module CDI-W30721DM
responsible for testing their end-product for any additional compliance requirements required with this module installed.

Cet appareil est conçu uniquement pour les intégrateurs OEM dans les conditions suivantes: Le module émetteur peut ne pas être coïmplanté avec un autre émetteur ou antenne. Tant que les 1 condition ci-dessus sont remplies, des essais supplémentaires sur l’émetteur ne seront pas nécessaires. Toutefois, l’intégrateur OEM est toujours responsable des essais sur son produit final pour toutes exigences de conformité supplémentaires requis pour ce module installé.

Important Note: In the event that these conditions cannot be met (for example certain laptop configurations or co-location with another transmitter), then the Canada authorization is no longer considered valid and the ISED cannot be used on the final product. In these circumstances, the OEM integrator will be responsible for reevaluating the end product (including the transmitter) and obtaining a separate Canada authorization.Any company of the host device which install this modular with limit modular approval should perform the test of radiated emission and spurious emission according to RSS-247 and RSSGen requirement, only if the test result comply with RSS-247 and RSS-Gen requirement, then the host can be sold legally.

Note Importante: Dans le cas où ces conditions ne peuvent être satisfaites (par exemple pour certaines configurations d’ordinateur portable ou de certaines co-localisation avec un autre émetteur), l’autorisation du Canada n’est plus considéré comme valide et l’ ISED ne peut pas être utilisé sur le produit final. Dans ces circonstances, l’intégrateur OEM sera chargé de réévaluer le produit final (y compris l’émetteur) et l’obtention d’une autorisation distincte au Canada. toute entreprise de l’hôte qui installent ce dispositif modulaire avec limite approbation devrait effectuer l’essai des modules et des rayonnements non essentiels des émissions rayonnées selon RSS-247 et le cnr gen, seulement si le résultat d’essai conforme RSS-247 et le cnr -gen, puis l’hôte peut être vendu légalement.

End Product Labeling The final end product must be labeled in a visible area with the following: Contains IC:32294-W30721DM. Plaque signalétique du produit final Le produit final doit être étiqueté dans un endroit visible avec l’inscription suivante: Contient des IC:32294-W30721DM.

Manual Information to the End User The OEM integrator has to be aware not to provide information to the end user regarding how to install or remove this RF module in the user’s manual of the end product which integrates this module. The end user manual shall include all required regulatory information/warning as show in this manual. Manuel d’information à l’utilisateur final L’intégrateur OEM doit être conscient de ne pas fournir des informations à l’utilisateur final quant à la façon d’installer ou de supprimer ce module RF dans le manuel de l’utilisateur du produit final qui intègre ce module. Le manuel de l’utilisateur final doit inclure toutes les informations réglementaires requises et

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avertissements comme indiqué dans ce manuel.

Wi-Fi Module CDI-W30721DM

ISED Statement
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. Cet appareil contient des émetteurs/récepteurs sans licence qui sont conformes aux RSS sans licence d’Innovation, Sciences et Développement économique Canada. L’exploitation est soumise aux deux conditions suivantes : (1) Cet appareil ne doit pas causer d’interférences. (2) Cet appareil doit accepter toute interférence, y compris les interférences qui pourraient causer un fonctionnement indésirable de l’appareil.
ISEDC Radiation Exposure Statement: This equipment complies with ISEDC 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 equipment should be installed and operated with minimum distance 20cm between the radiator& your body.
Cet appareil est conforme aux limitesd’exposition de rayonnement RF ISEDC établiespour un environnement non contrôlé. Cetémetteur ne doit pas être co-implanté oufonctionner en onjunction avec toute autreantenne ou transmetteur.
Cet équipement doit être installé et utilisé avec une distance minimale de 20cm entre le radiateur et votre corps.
The device for operation in the band 51505350MHz is only for indoor use to reduce the potential for harmful inter interference to co-channel mobile satellite systems
L’appareil destiné à fonctionner dans la bande 5150-5350 MHz est uniquement destiné à une utilisation à l’intérieur afin de réduire le risque d’interférence nuisible aux systèmes mobiles par satellite dans le même canal.

FCC Statement
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. Any changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.
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Wi-Fi Module CDI-W30721DM
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 use 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. FCC 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. This equipment should be installed and operated with minimum distance 20cm between the radiator& your body.
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Documents / Resources

Cdtech CDI-W30721DM Dual Band WiFi4 Plus BLE5.0 Module [pdf] Owner's Manual
CDI-W30721DM, CDI-W30721DM Dual Band WiFi4 Plus BLE5.0 Module, Dual Band WiFi4 Plus BLE5.0 Module, WiFi4 Plus BLE5.0 Module, BLE5.0 Module

References

User Manual

Cdtech CDI-W30721DM Dual Band WiFi4 Plus BLE5.0 Module Owner’s Manual

CDI-W30721DM Dual Band WiFi4 Plus BLE5.0 Module

Product Information

Specifications

Product Usage Instructions

Installation

Software Setup

Troubleshooting

FAQ

Q: How do I reset the module to factory settings?

Q: Can I use multiple modules simultaneously?

Documents / Resources

References

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