In today's rapidly evolving wireless communication landscape, Bluetooth technology shines with its low power consumption and ease of use in short-range wireless communication. As new applications such as smart home and Industry 4.0 emerge, these smart devices urgently cover long-range distance and get stable connectivity through BLE radios. To meet the needs of wireless communication over a wider range, BLE devices with a high transmit output power came into being.

What is the Maximum Transmit Power of BLE?

Various regulatory agencies limit the transmit power of BLE radio devices. Typically, in all standards, the maximum transmit power for 2.4 GHz band devices is around 100 mW (20 dBm).

Common BLE Applications with High Transmit Power

The max. transmit power of BLE radios available today usually ranges between 0 dBm to around 20 dBm, expanding transmission distances from 10 meters to hundreds of meters. Obviously, the BLE radio devices with high TX power draw a lot of attraction and are favored by the following applications:

Common BLE Applications with High Transmit Power


  • Smart Home: Seamless connectivity between rooms across large houses or villas for smart lighting, security systems, and temperature control, etc. By high-power Bluetooth radios, users can control and monitor these smart devices at a longer distance, improving living convenience and safety.
  • Industrial Automation: In vast factories, where wireless communication between devices is crucial, high-power Bluetooth radios provide stable connections, and support large-scale monitoring and data transmission, thereby significantly boosting production efficiency.
  • Medical Device: Remote medical monitoring equipment in hospitals or care facilities, benefits from effective long-range data transmission. For example, BLE blood pressure monitor and heart rate monitor, greatly increase efficiency of patient monitoring and care experience.
  • Logistics Tracking: High-power Bluetooth devices also play important roles in logistics tracking and asset management. Efficient remote tracking and management of goods and assets in warehouses and transport vehicles can improve logistics efficiency and accuracy.
  • Smart Agriculture: Environmental monitoring and automation in large fields or greenhouses, achieve precision farming.

While these applications prioritize transmission power and range, higher transmit power also leads to increased power consumption. Therefore, when selecting Bluetooth Low Energy modules for different applications, it's essential to consider factors such as transmission power, communication range, antenna, and power consumption.

High-Power BLE Modules

Most of BLE modules have a maximum TX power of 4 dBm or 8 dBm, but a few exceed this. As an example, RF-star’s CC2652P, CC2652P7 series modules can output +20 dBm, while EFR32BG24/MG24 modules can output +19.5 dBm.

High-Power BLE Modules

TI CC2652P-Based Modules

RF-BM-2652P2 and RF-BM-2652P2I wireless modules are based on the Texas Instruments (TI) CC2652P SoCs with a built-in PA and maximum transmit power of +20 dBm. In addition, the modules also integrate a low-noise amplifier (LNA) to effectively improve the Bluetooth receiving sensitivity.

Importantly, the modules also support multiple protocols like Bluetooth 5.2 Low Energy, Thread, Zigbee®, IEEE802.15.4g, 6LoWPAN, and TI 15.4-Stack (2.4 GHz), running simultaneously through the dynamic multi-protocol manager (DMM). Thanks to these features, the wireless modules have been widely used in smart homes, gateways, and long-distance sensors.

Another good news is that RF-star has released a Bluetooth UART transparent transmission version for the modules. Rich AT commands allow customers to quickly shorten the product development lifetime, like:

  • 22 adjustment levels of transmission power: -20 dBm ~ +20 dBm
  • Supporting one-master and multi-slave connections, up to 8 devices can be connected at the same time
  • Customizing extended broadcast packets up to 251 bytes
  • Supporting a maximum stable UART forwarding rate of 35 KB/s
  • Observer mode with filterable parameters
  • Supporting Bluetooth pairing and bonding
  • Automatic reconnection

TI CC2652P7-Based Modules

Advanced CC2652P7-based BLE modules (RF-BM-2652P4 and RF-BM-2652P4I) also offer +20 dBm transmit output power.

Aside from supporting the above-mentioned ZigBee and other 2.4 GHz wireless technology, they can run Matter protocol. More tellingly, the large memory of 152 kB RAM and 704 kB Flash of these CC2652P7 modules allows them to be embedded in more complex applications.

Silicon Labs EFR32BG24/MG24 Modules

RF-BM-BG24B1 and RF-BM-BG24B2 modules support BLE5.4, Bluetooth mesh, and proprietary protocols, while RF-BM-MG24B1 and RF-BM-MG24B2 modules also support Matter, Zigbee, OpenThread, and more.

The EFR32MG24 wireless modules with 1536 kB Flash and 256 kB RAM provide enough space for future application growth.

This series of BLE modules are all designed as PCB onboard antennas with a maximum TX power of +19.5 dBm. They are often used in smart home devices such as gateways/hubs, sensors, switches, door locks, smart plugs, LED lighting, lamps, and medical devices like blood glucose meters and pulse oximeters.

For detailed parameters, please refer to this table.

BLE Modules with Maximum TX Power Exceeding 10 dBm

To sum up, these BLE modules not only feature high transmit power, but also advanced wireless technologies and flexible output options including PCB antenna, external IPEX connector and half-hole RF out interface. They are powerful wireless communication solutions for smart homes, industrial automation, and more.

For more information on high-power BLE modules, visit www.rfstariot.com or reach out at info@szrfstar.com.

RFID, short for radio-frequency identification, uses electromagnetic frequencies to communicate between RFID readers and RFID tags. RFID readers, transmit signals to read and write data on RFID tags. There are both active and passive tags. Active tags utilize batteries to boost their power output.

The physical tag read range is determined by the individual RFID reader and antenna power, the material and thickness of material the tag is coated or covered with, the type of antenna the tag uses, the material the tag is attached to and more!

While a specification may show a theoretical 2.4G Active RFID Tag read range of 5 meters (ideal conditions) it may be as little as 1 meter if the tag is attached to an object that is sitting on a metal surface surrounded by water and electromagnetic waves (not ideal conditions)!

Far-range UHF RFID tags can read at ranges as far as 12 meters with a passive RFID tag, whereas active tags can achieve ranges of 100 meters or more. The operating frequency of UHF RFID tags ranges from 300 MHz to 3 GHz, and UHF tags are the most vulnerable to interference.

It depends on the type of RFID system being used. A high-frequency (HF) reader based on the ISO 14443 air-interface protocol standard, designed for short-range transmission, has a maximum read range of about 18 inches. An active RFID system can read tags from 1,500 feet away or more, as the tags broadcast a signal and the systems are designed for longer-range applications.

Even within one type of RFID, however, there can be a wide array of read ranges. A passive ultrahigh-frequency (UHF) reader has a range of about 10 feet, while a model using a beam-steerable phased-array antenna can interrogate passive tags at a distance of 600 feet or more.

Keep in mind that the reader is only half of the story. A very small passive tag with a small antenna harvests less energy from and reflects less energy back to a reader. It, therefore, has a shorter read range than a tag with a much larger antenna.

It takes more than just sunlight to unleash the power of solar panels. An inverter is an important part of every solar panel system. Think of it this way: solar panels take energy from the sun. The inverter utilizes that energy to produce electricity that is compatible with your home.

 

More specifically, solar grid micro inverter convert the direct current (DC) generated by solar panels into alternating current (AC) that can be used by household appliances. These solar panel systems come in a variety of shapes and sizes, which helps improve the overall efficiency of the system.

 

While traditional string inverters connect multiple panels to a single inverter, microinverters operate at the individual panel level. They can optimize the conversion process to increase the efficiency of your solar panel system. Let's take a deeper look at microinverters, their technology, and how they compare to other inverters.

 

Solar grid tie micro inverter convert electricity from solar panels into usable electricity. Unlike centralized string inverters, which are usually responsible for the entire solar panel system, microinverters are installed at individual solar panel sites. Most solar panel systems with microinverters include a microinverter at each panel, but it is not uncommon for a single microinverter to be connected to a handful of panels.

 

Microinverters are categorized as Module Level Power Electronics (MLPE). Each microinverter operates independently of the other inverters in the system at the panel site. The independence of microinverters is very beneficial for complex installations or installations with shading. Due to its centralization, traditional string inverter technology operates at the lowest performing panel level. With microinverters, the solar panels have their own inverter, and even if one panel doesn't produce as much power as the others, it will continue to operate efficiently.

 

Microinverters are an excellent investment for most solar shoppers, especially if you have a complex roof or a roof with partial shading. Microinverters operate at the panel level and do not require a power optimizer to quickly shut down compliance and optimization. If a microinverter has a problem, only the panels connected to it will shut down, not the entire system. Microinverters typically diagnose and fix problems faster than central string inverters.

 

Microinverters are usually more expensive than string inverters. While better overall system performance may be obtained with microinverters, it is important to ensure that the long-term performance benefits outweigh the upfront costs. Microinverters are also located on the roof, which makes maintenance more difficult (and more costly if your warranty does not cover labor). Alternatively, string inverters are often more conveniently placed on the side of the house.

 

Many homeowners choose microinverters. They are the most popular choice on EnergySage. Part of the reason is their improved performance. Some installers also prefer them, which means they include them in their quotes more frequently.

 

Microinverters are a good choice if your roof has multiple flat surfaces facing different directions. They also make sense if your roof is shaded or angled differently throughout the day. Let's say you have some panels facing east and others facing south. In this case, the microinverters optimize performance by isolating production issues for each panel.

 

However, if you have a south-facing roof plane and no shading, we recommend that you discuss different options with our installers. In this case, microinverters may not be worth the extra cost.

How do microinverters compare to other types of solar inverters?

 

Contact Shenzhen Keyue New Energy Co. for more information.

Children's Day New Chapter: Tablet Devices Empower Smart Learning, Central Charging Stations Ensure Seamless Experience

With the rapid advancement of technology, the education sector has also witnessed a new wave of transformation. This Children's Day, a school in the city has brought an exciting gift to the students - tablet devices. This gift not only serves as a festive blessing for the children but also marks a profound change in their future learning methods.

In this digital era, tablet devices have become valuable tools for children's learning due to their portability, interactivity, and rich learning resources. To ensure students make the best use of these devices, the school has introduced a centralized charging station management system called "innovatecharger." This innovative initiative not only addresses the charging issues of the tablet devices but also ensures their safety and convenient management.

"innovatecharger" is a tablet charging management app designed specifically for schools. Through this app, teachers or administrators can easily monitor the charging status of each tablet to ensure they are always fully charged. Additionally, the system features intelligent recognition capabilities to automatically identify the model and charging requirements of each tablet for targeted charging management.

At the school's centralized USB-C charging station, students can place their tablet devices in designated charging slots, plug in the charging cable, and begin charging directly. Once the tablets are fully charged, the system automatically disconnects the power to prevent overcharging and device damage.

Moreover, the "innovatecharger" app also offers rich data statistics and analysis functions. Teachers or administrators can analyze charging records, usage duration, and other data to understand students' learning habits and device usage, enabling targeted teaching and management. Users can also utilize the app to set charging times, avoiding peak charging periods to achieve energy conservation goals.

This Children's Day, the school's innovative initiative has received widespread praise from students and parents. They have expressed that learning through tablet devices not only enhances their interest and efficiency in learning but also introduces them to the convenience and joy brought by technology. The introduction of centralized charging stations has alleviated their concerns during device usage, allowing them to enjoy learning with peace of mind.

In conclusion, this Children's Day holds special significance for the children at this school. They have not only received coveted gifts - tablet devices but have also experienced the new changes brought about by smart learning. Behind all of this progress lies the support of the "innovatecharger" centralized charging station management system. Let us look forward to the future where more schools can introduce such innovative initiatives to provide stronger support for children's learning and growth.

 

 DCM

In fiber communication, optical pulses extend due to dispersion and tend to overlap with adjacent pulse periods. This causes interference between adjacent bits and leads to a high BER.At a high bit rate equal to the pulse width, the bit error rate (due to dispersion) will become too large.The dispersion compensation module (DCM) (also known as the dispersion compensation unit, DCU) contains the optical fiber roller with the dispersion negative slope,with the slope compensation function, it can compensate the wide band dispersion and dispersion slope of the standard single-mode optical fiber (G.652) in the C band, so as to optimize the residual dispersion of the system.It is based on a mature and reliable optical fiber process, which can improve the performance of the optical transmission system. The dispersion range at 1550nm wavelength can reach from-10 to-2100ps/nm, and can provide the central wavelength and dispersion of products with special requirements.

Dispersion compensation module (DCM) is mainly used for DWDM network, also can be said to be mainly used for long-distance network.DCM is deployed everywhere in the network, and modules can easily plug into fiber links because it has fiber connectors for input and output.Insertion loss can be compensated with a fiber optic amplifier. We also often see that the dispersion compensation modules tend to be placed between two fiber amplifiers.

 

The main component of DCM is DCF, and the dispersion compensation fiber (DCF) is a large negative dispersion fiber.It is a new type of single mode optical fiber designed for the 1.3μm standard single mode optical fiber.In order to adopt WDM/EDFA technology, the working wavelength of the optical fiber must be changed from 1.3μm to 1.55μm, and the dispersion of the standard optical fiber at 1.55μm wavelength is not zero, but positive (17-20) ps/(nm·km), and has positive dispersion slope, which must be added to make dispersion compensation to ensure that the total dispersion of the whole optical fiber line is almost zero, so as to realize high speed, large capacity and long distance communication.

 

The customer uses the 10G SM 1550nm ZR 80KM optical module, because the actual optical cable distance reaches 120KM, resulting in the optical module can not work normally. In this case, there are two solutions,as follows:

 

1) In the middle position of the line, increase the OEO, regenerate the optical signal, to achieve the rebirth and recovery of the optical signal, but the disadvantage is that the middle node needs power supply, in fact, it is difficult to find the appropriate position.

 

2) FiberWDM provide high performance, high reliability EDFA amplifier, can directly amplify the signal at both ends of the room, with FiberWDM passive DCM optical signal compensation, can perfectly solve the user's long distance 120KM transmission needs. This scheme has low cost, no need to find intermediate nodes, and save cost. The application diagram is as follows:

 

 

FiberWDM’s DCM module provides a high level of compensation while maintaining lower planar insertion losses and lower latency. When working with the EDFA of FiberWDM, DCM provides a simple, reliable and cost-effective long-distance transportation solution that enables the signal without regeneration.

Welcome back, dear readers !

In our previous article, we unveiled an extraordinary timepiece designed exclusively for Muslim people - the AZAN Watch.

Today, we delve deeper into the functional marvels of  prayer watches that seamlessly blend devotion and technology. Brace yourselves for an enlightening journey into the world of prayer and time !

 

a. Prayer Time Calculation: Azan watches incorporate sophisticated algorithms to accurately calculate and display the five daily prayer times, taking into account the geographical coordinates of the wearer's location.

b. Azan Alerts: The most distinguishing feature of an Azan watch is the ability to recite the Azan at each prayer time. These watches utilize built-in speakers and pre-programmed audio recordings of various renowned muezzins to deliver the call to prayer. The melodious tones create a serene and spiritually uplifting environment.

c. Qibla Direction: Many Azan watches incorporate a digital compass or a Qibla indicator, enabling the wearer to easily determine the direction of the Kaaba in Mecca, which is the focal point for Muslims during prayer.

d. Prayer Reminders: In addition to the Azan alerts, Azan watches often include customizable alarms to remind the wearer of upcoming prayer times or other significant Islamic events.

e. Other Features: Azan watches may include standard watch functions such as date display, stopwatch, backlight, and multiple time zone settings to accommodate travelers.

 

In a world where time often engulfs us in a relentless race, Azan watches offer a harmonious balance, guiding us to pause, reflect, and find solace in our faith. This treasured fusion of tradition and technology serves as a testament to the remarkable human capacity to innovate while cherishing the essence of our cultural and religious heritage.

Islamic compass watch

 

An LED panel is a display technology that uses Light-Emitting Diodes (LEDs) to create visual. LED panels consist of an array of LED pixels that emit light to form images and videos.

 

The main function of an LED panel is to display visual content with high brightness, clarity, and color accuracy. It can be used in various applications, including:

 

Advertising and Marketing: LED panels are commonly used in outdoor billboards, digital signage, and advertising displays. They provide a vibrant and eye-catching platform for advertising messages and promotional content.

Entertainment and Events screen

Information Display: LED panels are used in public spaces, transportation systems, and corporate environments to display real-time information, such as departure times, weather updates, news headlines, and emergency alerts.

 

Entertainment and Events: LED panels are extensively used in concerts, sports events, live shows, and stage backdrops. They create immersive visual experiences by showcasing live visuals, video content, and special effects.

 

Retail and Exhibition: LED panels are employed in retail environments, exhibitions, and trade shows to showcase products, create engaging displays, and attract customers with dynamic and interactive content.

 

Control Rooms and Command Centers: LED panels are utilized in control rooms, command centers, and monitoring stations. They provide large-scale displays for monitoring and analyzing data, security surveillance, and real-time situational awareness.

 

Indoor and Outdoor Installations: LED panels are used in both indoor and outdoor environments. Indoor LED panels are typically used in environments with controlled lighting conditions, while outdoor LED panels are designed to be weatherproof and provide high visibility even in sunlight.

 

LED panels offer advantages such as high brightness, energy efficiency, long lifespan, and versatility in terms of screen size, resolution, and configuration. They can be customized to fit specific requirements and are often modular in nature, allowing for easy scaling and maintenance.

 

Overall, the primary function of an LED panel is to deliver captivating visual content that attracts attention, communicates information, and enhances the overall visual experience for various applications and settings.

No, LED TV and OLED are different display technologies.

 

LED TV (LED-LCD): LED TVs, also known as LED-LCD TVs, use an LCD (Liquid Crystal Display) panel backlighted by LEDs (Light-Emitting Diodes). These LEDs are positioned behind the LCD panel to provide the light source. The LCD panel controls the light passing through it to create the image. LED TVs are more commonly available and offer good picture quality, energy efficiency, and a range of screen sizes. However, their performance can vary depending on the quality of the backlighting and LCD panel used.

 

OLED (Organic Light-Emitting Diode): OLED is a different display technology where each pixel of the panel emits its own light. OLED screens are made of organic compounds that emit light when an electric current is applied. This allows for individually controlled pixels, providing the ability to display true blacks and infinite contrast ratios. OLED TVs offer excellent picture quality with vibrant colors, deep blacks, and wide viewing angles. They can also achieve thinner and more flexible designs, as they do not require a separate backlight layer like LED-LCD TVs.

OLED PANEL

When OLED is used as a TV. Modules with smaller pixel pitches are usually used.

 

For example, P2.5, p2, p1.86，p1.53 p1.25 modules. This is more popular in the market now. OLED screen used as indoor TV.

 

p1.86 LED panel

 

In summary, LED TV refers to an LCD TV with LED backlighting, while OLED TVs use organic light-emitting diodes to produce the light for each individual pixel. OLED technology generally offers superior image quality with deeper blacks, wider viewing angles, and more vibrant colors. However, LED TVs are more widely available and come with a range of features and price points to suit different budgets and needs.

LED screens offer several advantages over other display technologies.   Here are some of the key advantages of LED screens:

 

1. Brightness and Contrast: LED screens are known for their high brightness levels, allowing them to deliver vibrant and eye-catching images.   They can produce intense and uniform illumination, making them suitable for various environments, including well-lit rooms or outdoor settings.   Additionally, LED screens offer excellent contrast ratios, resulting in deep blacks and enhanced image quality.

 

2.Energy Efficiency: LED screens are energy-efficient compared to other display technologies.   LEDs consume less power, reducing energy costs and environmental impact.   They require less electricity to operate, making them an economical choice for businesses and households.

 

3.Long Lifespan: LED screens have a long lifespan compared to traditional display technologies.   LEDs can last for tens of thousands of hours, providing extended usage before needing replacement.   This long lifespan reduces maintenance and replacement costs, making LED screens a cost-effective investment in the long run.

 

4.Durability: LED screens are rugged and durable.   They are resistant to vibrations, shocks, and other external influences.   LED screens can withstand temperature variations and are less prone to damage, making them suitable for both indoor and outdoor applications.

 

5.Slim Design: LED screens have a slim profile due to their compact size and lightweight nature.   This makes them easy to install and mount on walls or structures.   The sleek design also enhances the aesthetics of the display, making them visually appealing.

 

6.Flexibility and Customization: LED screens are highly flexible in terms of size and shape.   They can be customized to fit specific requirements and can be easily assembled into larger video walls or creative display configurations.   This flexibility allows for creative and engaging visual experiences in various settings.

 

7.Real-Time Content Updates: LED screens facilitate real-time content updates and dynamic display capabilities.   They can display a wide range of digital content, including videos, images, animations, and interactive elements.   This makes LED screens ideal for advertising, information displays, and live event applications.

 

8.Wide Viewing Angles: LED screens provide wide viewing angles, ensuring clear visibility and consistent image quality from different viewing positions.   This allows for a better viewing experience, even when the audience is not directly in front of the screen.

 

Overall, LED screens offer superior brightness, energy efficiency, durability, and versatility, making them a popular choice for a wide range of applications, including advertising, digital signage, sports venues, theaters, and more.

OLED stands for Organic Light-Emitting Diode. OLED displays are a type of flat-panel display technology that is increasingly used in televisions, smartphones, wearable devices, and other electronic devices.

 

Unlike traditional LCD (Liquid Crystal Display) screens, which require a backlight to illuminate the pixels, OLED displays emit light themselves. Each pixel in an OLED display is made up of organic compounds that emit light when an electric current is applied. This allows for greater flexibility and thinner displays since there's no need for a separate backlight layer.

 

OLED displays offer several advantages over traditional LCD displays:

Better Picture Quality: OLED displays typically offer deeper blacks and higher contrast ratios compared to LCD screens because OLED pixels can individually turn on and off, resulting in true blacks and more vibrant colors.

 

Faster Response Time: OLED pixels can switch on and off much faster than traditional LCD pixels, leading to smoother motion and reduced motion blur in fast-paced scenes.

 

Thinner and Flexible Displays: Since OLED displays don't require a separate backlight layer, they can be made thinner and more flexible than LCD screens. This makes them suitable for curved displays and flexible devices.

 

Energy Efficiency: OLED displays can be more energy-efficient than LCD screens, especially when displaying dark or black content since OLED pixels emit light only when needed, whereas LCD screens always require a backlight.

 

However, OLED displays also have some limitations, such as potential issues with burn-in (where persistent images may cause uneven pixel wear) and higher manufacturing costs compared to LCD displays. Despite these limitations, OLED technology continues to improve, and OLED displays remain popular for their superior picture quality and versatility.