<p><em>青萍·李吉他蓝牙温湿度计</em><span>通过</span><em>Nordic nRF52832 SoC</em><em>将吉他的温度和湿度数据发送到智能手机</em><em>app</em></p>
<p><span>挪威奥斯陆</span><span><span> </span>– 2020</span><span>年</span><span>11</span><span>月</span><span>13</span><span>日</span><span><span> </span>–</span><span><span> </span></span><span>Nordic Semiconductor</span><span>宣布，总部位于北京的青萍科技</span><span>(</span><span>北京</span><span>)</span><span>有限公司已选择</span><span>nRF52832</span><span>低功耗</span><span>蓝牙</span><em><span> </span></em><span>(</span><em>Bluetooth</em><span>®</span><span><span> </span>Low Energy /Bluetooth LE)</span><span>先进多协议芯片级系统</span><span><span> </span>(SoC)</span><span>，为</span><span><span> </span></span><span>“</span><span>李吉他蓝牙温湿度计</span><span>”</span><span><span> </span></span><span>传感器设备提供内核处理和无线连接能力。</span></p>
<p><span>这款专业吉他温湿度传感器产品可通过</span><span>内置磁铁固定在吉他</span><span>音孔附近的面板上(也可用于其他木质乐器)，连续</span><span>监测吉他内部和周围的温湿度情况。用户可随时查看乐器存放环境的温湿度，并适时调整，</span><span>预防吉他变形、</span><span>开裂</span><span>或开胶。保存吉他的适宜温度范围为</span><span>20</span><span>～</span><span>25°C</span><span>，湿度范围为</span><span>40%</span><span>～</span><span>50%</span><span>，温度或湿度的剧烈变动可能导致严重的后果，例如部件翘曲、品丝突出和琴桥损坏等。</span></p>
<p><span>李吉他蓝牙温湿度计采用</span><span>Nordic</span><span>的</span><span>nRF52832 SoC</span><span>作为主要微处理器来控制其温度</span><span>/</span><span>湿度传感器和算法。</span><span>nRF52832 SoC</span><span>结合了功能强大并且带有浮点单元</span><span>(FPU)</span><span>的</span><span>64MHz</span><span>、</span><span>32</span><span>位</span><span>Arm®Cortex®M4</span><span>处理器和</span><span>2.4GHz</span><span>多协议无线电</span><span>(</span><span>支持蓝牙</span><span>5.2</span><span>、</span><span>ANT™</span><span>和专有</span><span>2.4GHz RF</span><span>协议软件</span><span>)</span><span>，具有</span><span>-96-dB RX</span><span>灵敏度，并带有</span><span>512kB</span><span>闪存和</span><span>64kB RAM</span><span>。</span></p>
<p><span>通过</span><span>Nordic SoC</span><span>提供的低功耗蓝牙连接，可将基于传感器的信息中继传输到用户的蓝牙</span><span>4.0(</span><span>及更高版本</span><span>)</span><span>智能手机上的</span><span>“</span><span>李吉他温湿度</span><span>”</span><span>和</span><span>/</span><span>或</span><span>“</span><span>青萍</span><span>+”app</span><span>。通过这些与安卓和</span><span>iOS</span><span>兼容的配套</span><span>app</span><span>，用户可查看实时温湿度读数、同步长达3</span><span>0</span><span>天的历史记录，并在温湿度水平超过设定范围时接收通知。当设备与</span><span>“</span><span>青萍蓝牙网关</span><span>”</span><span>配对使用时，用户可以远程监控数据或从任何地点接收推送通知。</span></p>
<p><span>李吉他蓝牙温湿度计使用</span><span>CR2032</span><span>纽扣电池，续航时间约为</span><span>8</span><span>个月，这在一定程度上要归功于</span><span>Nordic SoC</span><span>的超低功耗特性。</span><span>nRF52832</span><span>经过精心设计，具有</span><span>2.4GHz</span><span>无线电的</span><span>5.5mA</span><span>峰值</span><span>RX/TX</span><span>电流和全自动电源管理系统等功能，可将功耗降至最低。与</span><span>Nordic</span><span>的</span><span>nRF51</span><span>系列</span><span>SoC</span><span>相比，可将功耗降低多达</span><span>80%</span><span>。</span></p>
<p><span>nRF52832 SoC</span><span>随附</span><span>Nordic</span><span>的</span><span>S132 SoftDevice</span><span>一起提供</span><span>，</span><span>这是经过蓝牙</span><span>5.2</span><span>认证的</span><span>RF</span><span>软件协议栈</span><span>，</span><span>用于构建先进的低功耗蓝牙应用。</span><span>S132 SoftDevice</span><span>具有中央、外设、广播者和观察者低功耗蓝牙角色，并支持多达二十个连接。</span></p>
<p><span>青萍联合创始人兼首席运营官杜斌表示</span><span>：</span><span>“</span><span>我们决定在李吉他蓝牙温湿度计上使用</span><span>Nordic</span><span>的</span><span>nRF52832 SoC</span><span>，</span><span>因为它具有许多关键技术特征</span><span>，</span><span>包括支持浮点运算的</span><span>Arm Cortex M4F</span><span>处理器</span><span>，</span><span>可满足</span><span>app</span><span>对存储历史传感器数据所需求的充足闪存和</span><span>RAM</span><span>内存分配</span><span>，</span><span>它还有支持实时调试和仿真的软件架构</span><span>，</span><span>以及具有优势的功耗性能</span><span>：</span><span>TX(0dBm)</span><span>峰值电流为</span><span>5.3mA</span><span>，</span><span>RX</span><span>峰值电流为</span><span>5.4mA</span><span>。</span><span>”</span></p>
<p><span>“Nordic</span><span>功能丰富的软件开发套件</span><span>[SDK]</span><span>也是我们做此决定的关键因素。其软件</span><span>API</span><span>接口清晰且层次分明，并具有详细的功能例程。这些便利的优势相结合，可以帮助我们快速完成开发工作。</span><span>”</span></p>
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