竞赛 - bluetooth蓝牙技术 http://yikouzu.com/index.php/cn/projects/projects-collection Mon, 05 Jan 2026 10:10:12 +0800 Joomla! - Open Source Content Management zh-cn sale@bluetooth.com.cn (bluetooth.com.cn) 自动驾驶竞赛车 http://yikouzu.com/index.php/cn/projects/projects-collection/63-2020-nxp/20-autonomous-racing-car-the-first-place http://yikouzu.com/index.php/cn/projects/projects-collection/63-2020-nxp/20-autonomous-racing-car-the-first-place

项目简介

自动驾驶汽车开始统治世界。所以让我们试着做我们自己的赛车!

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]]> sale@bluetooth.com.cn (Super User) 2020恩智浦(NXP)创新挑战赛 Fri, 04 Sep 2020 10:34:11 +0800 采用蓝牙Mesh的污染参数监测系统 http://yikouzu.com/index.php/cn/projects/projects-collection/62-2019-5/23-mesh http://yikouzu.com/index.php/cn/projects/projects-collection/62-2019-5/23-mesh

项目中使用的工具物品

硬件

Arduino Uno - R3
LCD液晶屏套件16x2字符显示
Analog 气体传感器(MQ2)
40针公插头 10 个
USB A/Micro 线束 - 2m
10 跳线 150mm
CYW20819 BLE Mesh 5.0 开发板

软件、App和在线服务

Arduino IDE
Wiced Smart ( from CYPRESS)
Modus Toolbox 1.1 (from CYPRESS)

手工工具和制造器械

烙铁
插头, 特殊线
 

故事

研制了一套移动实时空气污染监测系统。这个系统正在开发中，目的是实时监测污染。本系统采用低成本的空气质量监测传感器与GPS和GSM/GPRS模块或蓝牙网状网络。各种气体的浓度将使用半导体传感器测量，并使用GPS模块定位该浓度。这个浓度将在不同的地点实时测量。传感器采集数据后将使用GPRS/蓝牙模块连同获得的位置将数据发送到数据库。上述工作的基础是提供一个实时动态的污染测量系统。.

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]]> sale@bluetooth.com.cn (Super User) 2019赛普拉斯蓝牙5暨物联网大赛获奖项目展示 Sun, 06 Sep 2020 21:09:20 +0800 植物土壤的水密度监测 http://yikouzu.com/index.php/cn/projects/projects-collection/62-2019-5/21-water-density-mapping-for-plants http://yikouzu.com/index.php/cn/projects/projects-collection/62-2019-5/21-water-density-mapping-for-plants

项目简介

Hardware Schematic Water Density Mapping For Plants

由于田间的变化，绘制农田土壤含水量地图是一项挑战。为了跟踪土壤水分含量，每株植物都配备了CYBT-213043和电容式土壤水分传感器，形成一个网状网络，配对的android app将数据存储在本地并弹出一个可视化标示。 

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]]> sale@bluetooth.com.cn (Super User) 2019赛普拉斯蓝牙5暨物联网大赛获奖项目展示 Fri, 04 Sep 2020 18:00:24 +0800 家庭花园工具 http://yikouzu.com/index.php/cn/projects/projects-collection/62-2019-5/18-home-garden-kit http://yikouzu.com/index.php/cn/projects/projects-collection/62-2019-5/18-home-garden-kit

项目简介

BLE Mesh为家庭花园提供了一个简单的解决方案。

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]]> sale@bluetooth.com.cn (Super User) 2019赛普拉斯蓝牙5暨物联网大赛获奖项目展示 Fri, 04 Sep 2020 03:27:23 +0800 物联网孵化器 http://yikouzu.com/index.php/cn/projects/projects-collection/64-2019-microchip/19-iot-incubator-the-first-place http://yikouzu.com/index.php/cn/projects/projects-collection/64-2019-microchip/19-iot-incubator-the-first-place

项目简介

基于云决策的工业物联网终端

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]]> sale@bluetooth.com.cn (Super User) 2019 Microchip 物联网竞赛 Fri, 04 Sep 2020 09:44:19 +0800 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()