Deprecated: Method ReflectionProperty::setAccessible() is deprecated since 8.5, as it has no effect since PHP 8.1 in /var/www/html/plugins/system/falangdriver/falangdriver.php on line 534
项目 - bluetooth蓝牙技术
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Deprecated: Using null as the key parameter for array_key_exists() is deprecated, use an empty string instead in /var/www/html/libraries/CBLib/CB/Legacy/cbPluginHandler.php on line 323

Deprecated: Using null as the key parameter for array_key_exists() is deprecated, use an empty string instead in /var/www/html/libraries/CBLib/CB/Legacy/cbPluginHandler.php on line 323

Deprecated: Using null as the key parameter for array_key_exists() is deprecated, use an empty string instead in /var/www/html/libraries/CBLib/CB/Legacy/cbPluginHandler.php on line 323

Deprecated: Using null as the key parameter for array_key_exists() is deprecated, use an empty string instead in /var/www/html/libraries/CBLib/CB/Legacy/cbPluginHandler.php on line 323

Deprecated: Using null as the key parameter for array_key_exists() is deprecated, use an empty string instead in /var/www/html/libraries/CBLib/CB/Legacy/cbPluginHandler.php on line 323

Deprecated: Using null as an array offset is deprecated, use an empty string instead in /var/www/html/components/com_comprofiler/plugin/user/plug_cbjdownloads/cbjdownloads.php on line 49

Deprecated: Using null as an array offset is deprecated, use an empty string instead in /var/www/html/components/com_comprofiler/plugin/user/plug_cbblogs/cbblogs.php on line 48

Deprecated: Using null as an array offset is deprecated, use an empty string instead in /var/www/html/components/com_comprofiler/plugin/user/plug_cbarticles/cbarticles.php on line 47

Deprecated: strtotime(): Passing null to parameter #1 ($datetime) of type string is deprecated in /var/www/html/templates/ja_allure/html/com_content/featured/default_item.php on line 44

Deprecated: strtotime(): Passing null to parameter #1 ($datetime) of type string is deprecated in /var/www/html/templates/ja_allure/html/com_content/featured/default_item.php on line 139

Deprecated: strtotime(): Passing null to parameter #1 ($datetime) of type string is deprecated in /var/www/html/templates/ja_allure/html/com_content/featured/default_item.php on line 44

Deprecated: strtotime(): Passing null to parameter #1 ($datetime) of type string is deprecated in /var/www/html/templates/ja_allure/html/com_content/featured/default_item.php on line 139

Deprecated: strtotime(): Passing null to parameter #1 ($datetime) of type string is deprecated in /var/www/html/templates/ja_allure/html/com_content/featured/default_item.php on line 44

Warning: Undefined property: stdClass::$catslug in /var/www/html/templates/ja_allure/html/com_content/featured/default_item.php on line 55
Platform construction

bluetooth@rafavi:/mnt/c/Windows/system32$ sudo systemctl start redis && sudo systemctl enable redis Failed to enable unit: Refusing to operate on alias name or linked unit file: redis.service bluetooth@rafavi:/mnt/c/Windows/system32$ systemctl start redis Failed to start redis.service: Interactive authentication required. See system logs and 'systemctl status redis.service' for details.

WSL ubuntu

Deprecated: strtotime(): Passing null to parameter #1 ($datetime) of type string is deprecated in /var/www/html/templates/ja_allure/html/com_content/featured/default_item.php on line 139

Deprecated: strtotime(): Passing null to parameter #1 ($datetime) of type string is deprecated in /var/www/html/templates/ja_allure/html/com_content/featured/default_item.php on line 44

Warning: Undefined property: stdClass::$catslug in /var/www/html/templates/ja_allure/html/com_content/featured/default_item.php on line 55
蓝牙定位

This example shows you how to calculate the 2-D or 3-D position of a Bluetooth® low energy (LE) node by implementing Bluetooth direction finding features and the triangulation-based location estimation technique by using Bluetooth® Toolbox™. The Bluetooth Core Specification 5.1 [2] introduced angle of arrival (AoA) and angle of departure (AoD) direction finding features to support centimeter-level accuracy in Bluetooth LE location finding.

Using this example, you can:

  • Simulate the direction finding packet exchange between the Bluetooth LE node and each locator to estimate the angles between them.
  • Estimate the location of Bluetooth LE node by using triangulation-based location estimation technique in an additive white Gaussian noise (AWGN) channel.
  • Measure the positioning accuracy of the Bluetooth LE node related to the bit energy-to-noise density ratio (Eb/No).

Deprecated: strtotime(): Passing null to parameter #1 ($datetime) of type string is deprecated in /var/www/html/templates/ja_allure/html/com_content/featured/default_item.php on line 139

Deprecated: strtotime(): Passing null to parameter #1 ($datetime) of type string is deprecated in /var/www/html/templates/ja_allure/html/com_content/featured/default_item.php on line 44

Warning: Undefined property: stdClass::$catslug in /var/www/html/templates/ja_allure/html/com_content/featured/default_item.php on line 55
星闪

星闪联盟是致力于全球化的产业联盟，目标是推动新一代无线短距通信技术SparkLink的创新和产业生态，承载智能汽车、智能家居、智能终端和智能制造等快速发展的新场景应用，满足极致性能需求。2020年9月22日，星闪联盟正式成立。

Deprecated: strtotime(): Passing null to parameter #1 ($datetime) of type string is deprecated in /var/www/html/templates/ja_allure/html/com_content/featured/default_item.php on line 139
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Deprecated: Using null as the key parameter for array_key_exists() is deprecated, use an empty string instead in /var/www/html/libraries/CBLib/CB/Legacy/cbPluginHandler.php on line 323

Deprecated: Using null as the key parameter for array_key_exists() is deprecated, use an empty string instead in /var/www/html/libraries/CBLib/CB/Legacy/cbPluginHandler.php on line 323

Deprecated: Using null as an array offset is deprecated, use an empty string instead in /var/www/html/libraries/src/Menu/AbstractMenu.php on line 164

Deprecated: Using null as an array offset is deprecated, use an empty string instead in /var/www/html/libraries/CBLib/CB/Legacy/LegacyFoundationFunctions.php on line 217

Deprecated: Using null as an array offset is deprecated, use an empty string instead in /var/www/html/libraries/CBLib/CB/Legacy/LegacyFoundationFunctions.php on line 219

Deprecated: Using null as an array offset is deprecated, use an empty string instead in /var/www/html/libraries/CBLib/CB/Legacy/LegacyFoundationFunctions.php on line 227

Deprecated: Using null as an array offset is deprecated, use an empty string instead in /var/www/html/libraries/CBLib/CB/Legacy/LegacyFoundationFunctions.php on line 231

Deprecated: Using null as an array offset is deprecated, use an empty string instead in /var/www/html/libraries/CBLib/CB/Legacy/LegacyFoundationFunctions.php on line 234

Deprecated: Using null as an array offset is deprecated, use an empty string instead in /var/www/html/libraries/CBLib/CB/Legacy/LegacyFoundationFunctions.php on line 237

Deprecated: Using null as an array offset is deprecated, use an empty string instead in /var/www/html/libraries/CBLib/CB/Legacy/LegacyFoundationFunctions.php on line 239

Deprecated: Method ReflectionProperty::setAccessible() is deprecated since 8.5, as it has no effect since PHP 8.1 in /var/www/html/plugins/system/falangdriver/falangdriver.php on line 100

Deprecated: Method ReflectionProperty::setAccessible() is deprecated since 8.5, as it has no effect since PHP 8.1 in /var/www/html/plugins/system/falangdriver/falangdriver.php on line 100
mysqli object is already closed (500 Whoops, looks like something went wrong.)

Error

HTTP 500 Whoops, looks like something went wrong.

mysqli object is already closed

Exception

Error

in /var/www/html/libraries/vendor/joomla/database/src/Mysqli/MysqliDriver.php (line 318)
  1. */
  2. public function disconnect()
  3. {
  4. // Close the connection.
  5. if (\is_callable([$this->connection, 'close'])) {
  6. $this->connection->close();
  7. }
  9. parent::disconnect();
  10. }
in /var/www/html/libraries/vendor/joomla/database/src/Mysqli/MysqliDriver.php -> close (line 318)
  1. */
  2. public function disconnect()
  3. {
  4. // Close the connection.
  5. if (\is_callable([$this->connection, 'close'])) {
  6. $this->connection->close();
  7. }
  9. parent::disconnect();
  10. }
in /var/www/html/libraries/vendor/joomla/database/src/DatabaseDriver.php -> disconnect (line 496)
  1. *
  2. * @since 2.0.0
  3. */
  4. public function __destruct()
  5. {
  6. $this->disconnect();
  7. }
  9. /**
  10. * Alter database's character set.
  11. *
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()

Deprecated: Method ReflectionProperty::setAccessible() is deprecated since 8.5, as it has no effect since PHP 8.1 in /var/www/html/plugins/system/falangdriver/falangdriver.php on line 100

Deprecated: Method ReflectionProperty::setAccessible() is deprecated since 8.5, as it has no effect since PHP 8.1 in /var/www/html/plugins/system/falangdriver/falangdriver.php on line 100