Bluetooth蓝牙技术

Insights & Analysis

The Application of Bluetooth Location Technology in Senior Living Communities

The Application of Bluetooth Location Technology in Senior Living Communities: Enhancing Health...

How Bluetooth Enables Emotion Recognition: A Technical Overview

Bluetooth itself is a wireless communication protocol for data transfer and does not directly...

Bluetooth Beacon Networks: Extending Satellite Navigation to Ground-Based Precision Positioning

Bluetooth Beacon Networks: Extending Satellite Navigation to Ground-Based Precision Positioning As...

The Market for Bluetooth Positioning: From Ubiquitous Connectivity to Contextual Intelligence

The global positioning landscape is undergoing a profound transformation. While satellite-based...

Bluetooth Positioning Algorithms: Comparative Analysis and Strategies for Higher Accuracy

Part 1: Comparative Analysis of Key Algorithms Bluetooth positioning algorithms can be categorized...

sparklink

SparkLink Alliance

SparkLink Alliance is an industrial alliance committed to promote next-generation wireless short-range communication technology innovation and industry ecosystem, and support applications in smart cars, smart homes, smart...

instrument and equpment

Portable GPS signal acquisition (BDS,GPS,GLONASS,GALILEO,GNSS test)

Portable signal acquisition and replay equipmentIt can complete the acquisition, storage and playback of 30MHz~ 3.6ghz analog signals, and simulate multi-frequency interference signals and fraud signals of BDS, GPS, GLONASS and...

Bowers & Wilkins Pi7 S2 TWS bluetooth earbuds

High-resolution sound and crystal-clear voice calls, an industry-first wireless audio retransmission case.

Tech Decode

Chip

UWB+GNSS Indoor and outdoor integrated positioning module

CM52 series products are UWB+GNSS indoor and outdoor integrated positioning module solutions...

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Low power intelligent offline voice interaction MCU

Load More Made in China

Marketing

Rafavi Smart EV Chargers

✅ Core Positioning: Professional smart EV charging solution provider, covering AC slow-charge & DC...

Annual industry robots installed in top five countries

Here are the annual industrial robot installations for the top five countries in recent years,...

Empowering Connections, Co-creating the Future: Bluetooth.com.cn Seeks Strategic Partners to Expand in the Wireless Frontier

Bluetooth.com.cn has long been a pioneer in China’s Bluetooth technology sector. As one of the...

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bluetooth inclination sensor

low power bluetooth inclination sensor

4G/GSM Bluetoot 5.1 low power wireless inclination sensor

instrument and equpment

Portable GPS signal acquisition (BDS,GPS,GLONASS,GALILEO,GNSS test)

Portable signal acquisition and replay equipmentIt can complete the acquisition, storage and...

Rafavi

Professional radio noise reduction live microphone Rafavi_Mic_001

Professional radio noise reduction live microphone

TWS Bluetooth Headsets

Rafavi smart LCD touch ENC bluetooth earbuds R10

Customizable photo screensaver, support connected mobile phone pictures. Support short video...

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Email PDF Print

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detail-heading">

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rafavi

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￥0.00

Price

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Function

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Primary Competitive Advantages

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Specification

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Note

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                     Chip Brand-


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                     Chip Model
                     __                 
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                     Bluetooth Version5.3
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                     Waterproof Level
                     __                 
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                     Warranty
                     __                 
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                     Color
                     __                 
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                     Accessory
                     __                 
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                     Bluetooth ProtocolA2DP
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                     Effective Distance (m)
                     __                 
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                     Modes双耳模式
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                     Talk Time (hours)
                     __                 
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                     Music Duration (normal volume,hours)
                     __                 
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                     Total Working Time with Charging Box (hours)
                     __                 
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                     Eeadphone Battery Capacity (mAh)
                     __                 
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                     Charging Box Battery Capacity (mAh)
                     __                 
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                     Impedance (Ω)
                     __                 
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                     Dimension
                     __                 
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                     Volume per Unit
                     __                 
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                     Weight per Unit
                     __                 
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                     Packaging
                     __                 
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                     Unit L/W/H with packaging
                     __                 
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                     Weight per Unit (with packaging)
                     __                 
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                     Units per Export Carton
                     __                 
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                     Carton Dimensions L/W/H
                     __                 
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                     Carton Weight
                     __                 
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                     Certification
                     __                 
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                     Certificate Number
                     __                 
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                     Certificate Issue Date
                     __                 
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                     Certificate Expiry Date
                     __                 
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                     Certificate Issued By
                     __                 
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                     ContactMr.yang
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                     qq1515278558
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                     Telephone(+86)010-84391251
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                     Mobile+86 18519213808
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                     Company北京瑞驰四方汽车技术有限责任公司
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                     Website
                       
                                               
                       
                 

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detail-facilities info-right">

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Rating will be enabled once the form has been saved

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￥697.01

No vote

QR code whatsapp Michael Liang en

Login

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Blog Categories

￥34.85

No vote

Bluetoothchina Wechat Official Accounts

qrcode for gh 84b6e62cdd92 258

Error

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mysqli object is already closed

Exception

Error

in /var/www/html/libraries/vendor/joomla/database/src/Mysqli/MysqliDriver.php (line 318)

*/
public function disconnect()
{
// Close the connection.
if (\is_callable([$this->connection, 'close'])) {
$this->connection->close();
}
parent::disconnect();
}

in /var/www/html/libraries/vendor/joomla/database/src/Mysqli/MysqliDriver.php -> close (line 318)

*/
public function disconnect()
{
// Close the connection.
if (\is_callable([$this->connection, 'close'])) {
$this->connection->close();
}
parent::disconnect();
}

in /var/www/html/libraries/vendor/joomla/database/src/DatabaseDriver.php -> disconnect (line 496)

*
* @since 2.0.0
*/
public function __destruct()
{
$this->disconnect();
}
/**
* Alter database's character set.
*

DatabaseDriver->__destruct()

Stack Trace

Error
Error: mysqli object is already closed at /var/www/html/libraries/vendor/joomla/database/src/Mysqli/MysqliDriver.php:318 at mysqli->close() (/var/www/html/libraries/vendor/joomla/database/src/Mysqli/MysqliDriver.php:318) at Joomla\Database\Mysqli\MysqliDriver->disconnect() (/var/www/html/libraries/vendor/joomla/database/src/DatabaseDriver.php:496) at Joomla\Database\DatabaseDriver->__destruct()

Error

Error:
mysqli object is already closed

  at /var/www/html/libraries/vendor/joomla/database/src/Mysqli/MysqliDriver.php:318
  at mysqli->close()
     (/var/www/html/libraries/vendor/joomla/database/src/Mysqli/MysqliDriver.php:318)
  at Joomla\Database\Mysqli\MysqliDriver->disconnect()
     (/var/www/html/libraries/vendor/joomla/database/src/DatabaseDriver.php:496)
  at Joomla\Database\DatabaseDriver->__destruct()

Insights & Analysis

Tech Decode

Chip

Marketing

Training

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Function

Primary Competitive Advantages

Specification

Note

Chip Brand

Chip Model

Bluetooth Version

Waterproof Level

Warranty

Color

Accessory

Bluetooth Protocol

Effective Distance (m)

Modes

Talk Time (hours)

Music Duration (normal volume,hours)

Total Working Time with Charging Box (hours)

Eeadphone Battery Capacity (mAh)

Charging Box Battery Capacity (mAh)

Impedance (Ω)

Dimension

Volume per Unit

Weight per Unit

Packaging

Unit L/W/H with packaging

Weight per Unit (with packaging)

Units per Export Carton

Carton Dimensions L/W/H

Carton Weight

Certification

Certificate Number

Certificate Issue Date

Certificate Expiry Date

Certificate Issued By

Contact

qq

Telephone

Mobile

Company

Website

Whatsapp

Login

Blog Categories

Bluetoothchina Wechat Official Accounts

Categories

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mysqli object is already closed

Exception

Error

Stack Trace