Bluetooth Module PCB

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What is bluetooth module PCB?

Bluetooth PCB technology is a communication technology that operates at a range of 2.4GHz.
It is a radio frequency range that makes use of the Wi-Fi technology. The Bluetooth communication has a master device that is remotely connected to a maximum of seven slave devices.

What is bluetooth module PCB?
What is bluetooth module PCB?

What is bluetooth module PCB?

Printed circuit boards (PCBs) are the foundational building block of most modern electronic devices.
Semiconductors, connectors, resistors, diodes, capacitors and radio devices are mounted to, and “talk” to one another through the PCB.

What is HC-06 bluetooth module PCB?

The HC-06 bluetooth module is a slave bluetooth module designed for wireless serial communication.
It is a slave module meaning that it can receive serial data when serial data is sent out from a master bluetooth device(device able to send serial data through the air: smart phones, PC).

What is HC-06 bluetooth module PCB?

Venture Bluetooth modules PCBs are wireless enabling components that are attached usually to a motherboard. It enables the device to connect and broadcast via a Bluetooth signal.

Venture Bluetooth modules PCBs can be installed on many different devices. So, it greatly improves the basic functions of the device.

For your Bluetooth modules PCB needs, Venture is the best partner you can rely on.

Your Leading Bluetooth Module PCB Supplier in China

If you are looking for a one-stop supplier for your Bluetooth module PCB needs, Venture Electronics is the best choice! We have manufacture different types of Bluetooth module PCB for your business necessities.

Venture Bluetooth module PCB provides Bluetooth connectivity in legacy and existing designs that may have been based upon the 802.15.4 standard.

Our Bluetooth module PCB is designed to support multiple interface protocols. Since they are easy to design and are fully certified, they are great for embedded Bluetooth solution.

Venture Bluetooth module PCB is manufacture with great and advantageous features like:

  • high-performance,
  • on-chip antenna
  • support for Bluetooth EDR

With its beneficial features, our Bluetooth module PCB delivers up to a 3 Mbps data rate for distances up to 20 meters.

As a professional manufacturing company, Venture is experts in manufacturing high-end Bluetooth module PCB to meet the requirements of your different applications.

As a leading manufacturer and supplier, we can manufacturer and distribute the highest quality and functional Bluetooth module PCB for your projects.

Venture is a professional manufacturer and supplier of the Bluetooth module PCB in China for more than 20 years. We are famous in manufacturing PCBs then shipping it to Europe, North America, and throughout the world.

Along with our rich experience team of engineers, project managers, and QA specialists, we became the most trusted Bluetooth module PCB manufacturer and supplier in China. We make sure the product quality from demand to delivery.

If you desire a long-lasting business for your PCB, then consider Venture Electronics as your immediate best manufacturer, supplier, and distributor.

Contact us now!

Bluetooth Module PCB: The Ultimate FAQ Guide


I know you would like to learn more about Bluetooth module PCB.

That’s why this guide will answer all your questions about Bluetooth module PCB.

From design requirements, specifications, features to working frequencies – you will find all information you’re looking for right here.

Keep reading to learn more.

What Are The Applications Of Bluetooth Module PCB In The Internet Of Things?

Bluetooth Module PCB

Bluetooth Module PCB

Bluetooth module PCBs find wide usage, especially in providing communication with devices connected to the internet known as the Internet of Things. You can classify common applications of the Bluetooth module PCB into the following categories:

Smart Industry

The manufacturing included has implemented Bluetooth module PCB in its assembly lines to optimize production and monitor inventory. Moreover, you can track parts using these PCBs while also managing security via alarm systems.

Smart Home Features

The Bluetooth module PCB finds applications in home automation where it features temperature and light regulation systems. Additionally, maintenance features for your home, energy-saving controls, and smart appliances employ Bluetooth module PCBs.

Techno Cities

Here, you employ Bluetooth module PCBs in traffic control where you install smart traffic lights. You can also employ the PCB in meters for electricity and water as well as alarms for accidents.

Health Care

You find the Bluetooth module PCB essential in medical applications such as remote nursing and tracking drugs and ambulances. You also employ Bluetooth module PCBs in access control, allowing you to regulate different aspects remotely.

Automobile Application

Modern vehicles can communicate via Bluetooth module PCB while also replacing wired internal communication with wireless type. Furthermore, you find these vehicles offer you wireless control multimedia entertainment thanks to the Bluetooth module PCB.

How Does Bluetooth Module PCB Vs. Wi-Fi Module PCB Compare?

Wfi Module PCB.

W-fi Module PCB

The Bluetooth Module PCB and Wi-Fi Module PCB are the major wireless communication setups employed worldwide currently. However, choosing between the two is sometimes difficult, requiring a comparative analysis as follows:

Power Needs

Power consumption is a major problem you associate with the wireless communication devices of Bluetooth and Wi-Fi module PCBs. While recent Bluetooth standards have a lower turn-on time, they have high power demands.

Application Standards

You find Bluetooth and Wi-Fi both allow you to communicate wirelessly in the public frequency band defined as ISM 2.4 GHz. However, you find the Bluetooth PCB employs the FHSS approach splitting 79 channels in the 83.5 MHz frequency band.

Distance Of Transmission

The latest Bluetooth standard you can employ in a Bluetooth Module PCB can afford you a transmission range reaching 100 meters. However, when employing a Wi-Fi module PCB in an open area, you can achieve a transmission range of 300 meters.

Speed Of Transmission

In theory, the Wi-Fi protocol has a speed of about 600 Mbps. However, it currently sits at 300 Mbps in actuality. For the Bluetooth standard employed by the Bluetooth Module PCB, you find a peak rate of 25 Mbps.


Every technological advancement comes at a price, and wireless communication is no different. Presently, you find Wi-Fi Module PCBs come at slightly higher costs than Bluetooth Module PCBs.

Which Are The Types Of Bluetooth Module PCB?

Some of the common types of Bluetooth Module PCBs are as follows:

HC-05 Bluetooth Module

The HC-05 is a common wireless two-way (full-duplex) Bluetooth module PCB that you can employ in a variety of projects. You can create communication between a microcontroller pairing, such as an Arduino, or with any Bluetooth-enabled device, such as a phone.

HC-05 Bluetooth Module

HC-05 Bluetooth Module

HM-11 Bluetooth Module

The HM-11 is a surface-mounted module that allows for reliable network nodes at low bill-of-materials costs. It employs the Bluetooth 4.0 version, and you can use it for ultralow power consumption systems.

HM-11 Bluetooth Module

HM-11 Bluetooth Module


The ESP32 is a Bluetooth Module PCB that features a highly integrated microcontroller unit applicable to various devices. The module features internal switches for the antenna, filters, and power and low noise receiver amplifiers.

ESP32 Bluetooth Module

ESP32 Bluetooth Module


The CSR8645 is dual-mode ROM audio Bluetooth Module PCB designed for full voice and music capabilities. Therefore, you find its common use in voice and music-enabled wireless audio products.

This module finds a processor, Bluetooth radio with dual-mode, and DSP with low power. Also integrated are a memory chip, interfaces for audio and hardware, and battery charger.

CSR8645 Bluetooth Module

CSR8645 Bluetooth Module

How Do You Select The Best Bluetooth Module PCB?

When selecting a Bluetooth module PCB, it is essential to take into account the following considerations:

Bluetooth Standards

Since the introduction of Bluetooth, there have been numerous versions of the standard. You find the most common are the Basic Rate (BR), Enhanced Data Rate (EDR), and the Low Energy version (LE).

Frequency Band

You find 79 channels in total for Bluetooth signal transmission, ranging from 2.4 GHz to 2.4835 GHz. Additionally, you have a frequency band spacing of 1 MHz.

Low-energy Bluetooth standards focus on lowering power demand and costs, making wave filter design easier. You have an extended channel interval to 2 MHz, with a total of 40 channels.

Distance Of Transmission

The Bluetooth network, like any other wireless technology, has a limited range. You note the distance of transmission varies depending on the version, with low-energy Bluetooth having a longer range.

The distance of transmission supported by a single version varies with different power classes. Thus, where you have a bigger power class, you achieve greater distance.

Rate Of Transmission

You find low energy Bluetooth doesn’t ensure transmission rate but instead concentrates on simple information transmission. Therefore, the transmission rate of low-energy Bluetooth will theoretically not support its maximum bandwidth (1 MHz).

Transmission Output Power And Operating Current/Voltage

Higher power means you can achieve a longer range. In addition to meeting the Bluetooth criteria, your device must also meet the power requirements as set by the regulatory body.

The Bluetooth device is typically battery-powered. Therefore the device’s operating current/voltage is a key concern. You find this is because it directly affects the battery life and charging cycle.


A Bluetooth module PCB’s microprocessor functions as its brain to optimize hardware functionality, receive wireless data, and quickly integrate and analyze information.

When choosing a microprocessor for your Bluetooth module PCB, consider the: size, memory, power consumption, peripheral extensibility, computation performance, and price.

Operating System (OS)

The inclusion of Bluetooth module PCBs on Android, iOS, Linux, and WinCE allows end-users to interact highly with smart platforms. Consequently, you can set up a Bluetooth connection quickly and monitor the application.

Operating Temperature

A Bluetooth module PCB’s most frequent operational temperature range is between -40°C to 85°C. Most Bluetooth modules target commercial use at moderate temperatures.

You can employ some Bluetooth module PCBs at severe temperatures, thus requiring protection equipment such as a fan or insulation chamber.

Antennas And Interfaces

There are two types of antennas for Bluetooth module PCBs: omnidirectional and directional antennae. You can maximize signal coverage by employing an omnidirectional antenna to broadcast signals over a 360° range.

Alternately, the directional antenna only emits signals in a certain direction, making it ideal point-to-point transmission. You employ the omnidirectional antenna for home or office network coverage needs.

What Are The Main Components Of Bluetooth Module PCB?

You find the following components on a Bluetooth module PCB:

  • An antenna connector that allows you to send and receive information alongside an antenna matching circuit.
  • Crystal Oscillators are necessary for radio function.
  • Low Noise and Power Amplifiers
  • Power components including capacitors (decoupling), resistors, Diodes, and sometimes DC/DC converters.
  • At least two inductors regulate antenna impedance, thereby improving performance.
  • Non Volatile memory
  • A module with four input pins, including power supply

Which Are The Versions Of Bluetooth Technology Applicable In Bluetooth Module PCB?

Over time, improvements in the development of Bluetooth communication have made it possible to make Bluetooth Module PCBs with better performances. While the earliest versions are outdated, most of these you can employ in a Bluetooth Module PCB.

Bluetooth 2.0 + EDR (2004)

The BT 2.0 + EDR employed Enhanced Data Rate and three-bit encoding (versus one). It increased the data transfer rate from 1 to 3 Mbps, which maxed out at 2.1 Mbps. You find while it consumed lower power, it also handled interference better than previous versions.

Bluetooth 2.1 + EDR (2007)

The follow-up to BT 2.0 also maintained Enhanced Data Rate. It also secured the pairing process through the addition of SSP (Secure Simple Pairing). You find encryption became obligatory, and it consumed less power.

Bluetooth 3.0 + HS (2009)

The following Bluetooth version encompassed High Speed (HS), achieving 24 Mbit/s. It is important to note that while the connection commenced through Bluetooth, it got transmitted over Wi-Fi.

Bluetooth 4.0 (2010)

The BT 4.0 pioneered low-power BLE (Bluetooth Low Energy) while maintaining Bluetooth high-speed protocols that are Wi-Fi-based. Consequently, you maintained the same range of communication, albeit with low power consumption.

Bluetooth 4.1 (2013)

Data efficiency improved with this standard, alongside avoiding interference with other similar technologies sharing the same frequency. You require reduced interventions manually while alternately employing devices as either hub or client, allowing interoperability.

Bluetooth 4.2 (2014)

The BT 4.2 had ten times more payload than its predecessor and was tailor-made for IoT. You note this version decreased the overhead allowing a two and a half times increase in data yield.

Furthermore, it sustained low power WPAN (wireless personal area network) version providing each connectible device an exclusive IP address.

Bluetooth 5.0 (2016)

You note an increased transmission range with the BT 5.0 from 50 to 200m and longer battery life. While capable of supporting IoT, it improved location services by providing more connection information.

Bluetooth 5.1 (2019)

This version’s main areas of advancement include Angles of Arrival and Departure (AoA/AoD) that allow device tracking and locating. It also employs an Advertising Channel Index while enhancing features such as the accuracy of the sleep clock updates mechanism.

Bluetooth 5.2(2019)

As the most recent version, you find similar features to the BT 5.1 combined with new features. Some of the features include low energy power control and isochronous channels and Enhanced Attribute Protocol.

Why Is Bluetooth 4.0 The Preferred Option For Most Bluetooth Module PCB Applications?

You find an increase in demand for low-energy Bluetooth applications led to the development of the Bluetooth 4.0 version.  The Bluetooth version finds applications in the wide Internet of Things with many devices and appliances built to support Bluetooth connectivity.

Some of the features that make Bluetooth 4.0 preferred for Bluetooth Module PCBs are:

  • The capability to make secure connections and low energy demands.
  • A length extension of data packets
  • Privacy with the Link Layers in addition to filter policies of Extended Scanner
  • The application capacity in various elements of the Internet of Things. Including devices, appliances, and systems.

What Is The Difference Between Classic And Low-Energy Bluetooth Versions Used In Bluetooth Module PCB?

Classic and Low-Energy Bluetooth versions are classifications you find based on new developments in the Internet of Things.

With classic Bluetooth, emphasis is on the data transmission rate, allowing applications such as Bluetooth headsets you employ for music. You find two classic Bluetooth classifications: Basic Rate (BR) and Enhanced Data Rate (EDR).

Contrarily, the Low-energy Bluetooth concentrates on transmitting simple information that prolongs the devices’ endurance time.

Low Energy Bluetooth Module PCB

Low – Energy Bluetooth Module PCB

Classic Version Bluetooth Module PCB

Classic Version Bluetooth Module PCB

How Many Pins Does HC-05 Bluetooth Module PCB Have?

An HC-05 Bluetooth module PCB has a pinout configuration with eight pins, each serving a unique purpose. The following constitutes the pins and their description:

  • Pin 1 – Enable/Key that you use for selecting Data Mode or AT command mode.
  • Pin 2 – Vcc pin, which powers the module.
  • Pin 3 – Ground pin, which connects the module to the ground.
  • Pin 4 – TX transmitter transmits serial data.
  • Pin 5 – RX Receiver, receives serial data.
  • Pin 6 – State Pin, connects to an LED on the board, and works as feedback.
  • Pin 7 – LED Pin, which indicates the module status when powered.
  • Pin 8 – Button for controlling the Enable pin.

How Do You Connect The HC-05 Bluetooth Module PCB?

You have two operating modes in an HC-05 Bluetooth module PCB: Data Mode and AT Command Mode. In Data Mode, this particular Bluetooth module PCB can receive and send data from other devices employing Bluetooth.

Alternately, a Bluetooth module PCB in AT Command Mode can allow you to change the default setting of the device. You can operate the HC-05 Bluetooth module PCB in either mode by toggling the Enable/Key pin.

The HC-05 employs the Serial Port Protocol (SPP), allowing you to pair it with microcontrollers. You power the HC-05 and connect its RX and TX pins to the TX and RX pins of the MCU, respectively.

Why Do You Need A Processor In Bluetooth Module PCB?

A processor in a Bluetooth module PCB gives your board controlled power and flexibility. You can control the board’s peripherals using SPI, PWM, GPIO, and I2C alongside the Bluetooth stack.

Using a processor allows you to achieve high volume at a low cost, thus improving performance. Additionally, you can customize your Bluetooth module PCB to work in different devices by employing a processor.

Which Are Some Of The Processors You Can Incorporate In Bluetooth Module PCB?

The processors in a Bluetooth module PCB constitute CMOS chips with a microcontroller unit and are central to module operation. The processors are smaller and cost less than the module itself, allowing design flexibility.


You identify the BlueNRG-MS as a single-mode network processor employing Bluetooth Low-Energy (BLE) power buttressed by its ultra-low-power sleep mode. This processor is compatible with Bluetooth version 4.1, taking up multiple roles simultaneously as a sensor and hub.




The nRF5340 is a development of Nordic semiconductors whose design is a System-On-Chip (SOC) capable of operating at high temperatures. It supports Bluetooth Low-Energy and combines two processors with flexibility features with AoA and AoD tracking capability.




The K32W041AM/A is a microprocessor family that supports large memory with an extended range for optimized use in smart applications. In Bluetooth module PCBs, you can employ these processors for home automation, smart lighting, routers, gateways, and smart locks.

What Is The Longest Transmission Range Of Bluetooth Module PCB?

The transmission range of a Bluetooth module PCB depends on the radio spectrum, transmission power, and receiver sensitivity. However, you find three common classifications of Bluetooth based on their transmission range as follows:

  • Class 3: maximum radiation distance of 1 meter, suitable for ultra-short transmissions
  • Class 2: maximum radiation distance of 10 meters, which most mobile devices fall beneath
  • Class 1: maximum radiation distance of 100 meters, primarily for industry

Which Are Some Of The Bluetooth Module PCB Design Considerations And Guidelines?

When designing the Bluetooth module PCB, the following constitutes some of the design considerations and guidelines:

  • The design of your Bluetooth module PCB should conform to the application, with each application having different needs. For instance, your module PCB should have increased transmission power and higher reception sensitivity where you want high throughput.
  • Separate your antenna area from close high-energy components and copper signals. You can employ a ground plane for a manual layout alongside stitching vias to thwart undesired radiation from the board edge.
  • Ensure the power supply path of the Bluetooth module PCB is clear, employing decoupling and bypass capacitors where necessary.
  • During antennae area designing, use the appropriate equipment for the analysis and set up during network matching. You can use a network analyzer or engage a professional laboratory for RF testing.
  • Consider obstructions in the actual area of application of your Bluetooth module PCB. You may have obstacles such as water bodies, metallic objects, and other electronic devices employing the same technology.

What Is The Frequency Band Of Bluetooth Module PCB?

Bluetooth technology operates communication within short distances wirelessly. It employs a frequency band designated 2.4 GHz ISM and ranges between 2.400 GHz to 2.4835 GHz.

When employing Classic Bluetooth, you note a 79 channel count with an individual band interval of 1MHz. The description includes a guard interval of 2 MHz bordering 2.400 GHz below and 3.5 MHz ordering 2.4835 GHz above.

How Do You Minimize Interference And Ensure Signal Integrity In Bluetooth Module PCB?

Interference hampers the performance of a Bluetooth module PCB while compromising signal integrity during transmission.  You can minimize interference and maintain good signal integrity by undertaking the following:

  • Only use a certified Bluetooth module PCB in your application since such a module puts measures for EMI vulnerability.
  • Employ an antenna of the right size and tune it appropriately. You can employ low-power equipment and related peripherals when your application is simple such as a beacon.
  • Isolate active components and conductive copper paths from the antenna area. Using a ground plane or grounded stitching vias can ensure you achieve great bandwidth.
  • Employ bypass and decoupling capacitors for your power supply to ensure a clear transfer path to the Bluetooth module PCB.

Does Bluetooth Module PCB Require Installation Of Support Software?

An important aspect when selecting your Bluetooth module PCB is the accompanying hardware and software. Hardware typically includes the Bluetooth chip and the module’s processor, both usually built into the device.

You can interface the Bluetooth module PCB with other inputs such as serial communication, crystal oscillator, and clock. However, you normally require support software for applications to particular functions.

Software support is critical for securing your data and enabling users’ simple interaction and controlled development. Several solutions in the market offer you different support software for Bluetooth module PCBs based on application.

What Are The Key Specifications Of Bluetooth Module PCB To Communicate To Your Manufacturer When Placing An Order?

When placing an order for a Bluetooth module PCB, you may need to communicate certain key specifications. These include:

  • The size of your Bluetooth module PCB and area of application.
  • The operating temperature range.
  • The Bluetooth version is applicable for your modules, such as Bluetooth v4.0 or v5.1.
  • The frequency and modulation.
  • The emission power speaks to the module’s range of transmission.
  • The sensitivity of the RX receiver
  • The data transfer speed with the maximum currently set at 2.1 Mbps for asynchronous and 1 Mbps for synchronous
  • The security measures, including authentication and encryption
  • The support profiles on your device, such as Bluetooth serial port.

Which Are The Main RF Performance Tests For Bluetooth Module PCB?

The major tests on RF performance for your Bluetooth Module PCB include:

Modulation Characteristics

You use the modulation characteristics test to authenticate the correctness of the modulation function of a transmitting signal. Bluetooth standards require you to conduct this test at a fixed frequency or, in its absence, a hopping environment.

Carrier Frequency Offset And Drift

In this test, you seek to determine the conformity of the transmitting signal’s carrier frequency within the required range. Consequently, you ensure the stability of the frequency of transmission. You can conduct this test at fixed or hopping frequencies or indirect transmission mode.

In-Band Spurious Emissions

You employ this test to verify a Bluetooth transmitting band’s spectrum spurious signal conformity to within standard’s set range.  The Bluetooth standard dictates that you conduct this test in an environment of hopping frequency, thus testing each band’s integrated power.

Frequency Range

When executing the frequency range test, you intend to determine the band’s transmitting signal power conforms to the established range. The test involves a two-step sequence at a fixed frequency of non-shopping characteristics involving a low-band and high-band test.

Power Density

Conducting this test seeks to verify the RF’s output power compliance to the set standard at maximum transmission. The standard stipulates that regardless of the class, the power of a modulation mode shouldn’t exceed 100mW for every 100kHz.

Receiver Tests

Conducting the Bluetooth module PCB receiver test employs a highly accurate signal generator to ensure your receiver’s signal reception is normal. When conducting this test, the set standard emphasizes the receiver’s sensitivity and blocking characteristics.

How Much Does Bluetooth Module PCB Cost?

The cost of a Bluetooth module PCB varies with size, area of application, and range of transmission. Consequently, you will find Bluetooth module PCBs employed in basic applications going for a few dollars to tens of dollars.

However, you find industrial applications of Bluetooth module PCBs requiring high-performance features that come at a premium. Like those employed in high-definition sound systems, such PCBs will typically set you back up to hundreds of dollars.

Venture Electronics offers a range of Bluetooth PCBs, including Bluetooth keyboard, and Bluetooth transmitter.

Contact us today for all your Bluetooth module PCBs.

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