【ST NUCLEO-WBA52CG】第五篇 BLE测试2之 BLE APP测试
<div class='showpostmsg'><p> </p><p ><span style="font-family:宋体;"><span style="font-size:16px;">好多年没有在玩蓝牙的板子了，这次拾起来，也不知道怎么玩，就来个基本的测试吧</span></span></p>
<p > </p>
<p ><span style="font-family:宋体;"><span style="font-size:16px;">手里正好有个蓝牙小米手环BAND7，来做个蓝牙测试吧</span></span></p>
<p > </p>
<p ><span style="font-family:宋体;"><span style="font-size:16px;">首先小米手环采用的芯片是Dialog Semiconductor-DA14706-低功耗蓝牙SOC芯片</span></span></p>
<p > </p>
<p ><span style="font-family:宋体;"><span style="font-size:16px;"> </span></span></p>
<p > </p>
<p ><span style="font-family:宋体;"><span style="font-size:16px;">而测评对象STM32WBA52的资料如下</span></span></p>
<p ><span style="font-family:宋体;"><span style="font-size:16px;"> </span></span></p>
<p > </p>
<p > </p>
<p ><span style="font-family:宋体;"><span style="font-size:16px;">看下发射功率的概念</span></span></p>
<p ><span style="font-family:宋体;"><span style="font-size:16px;"> </span></span></p>
<p > </p>
<p ><span style="font-family:宋体;"><span style="font-size:16px;">理论上应该STM32WBA52的传输距离更远，我们来测试一下，把两个东西放在一起</span></span></p>
<p ><span style="font-family:宋体;"><span style="font-size:16px;"> </span></span></p>
<p > </p>
<p ><span style="font-family:宋体;"><span style="font-size:16px;">打开BLE APP</span></span></p>
<p ><span style="font-family:宋体;"><span style="font-size:16px;"> </span></span></p>
<p > </p>
<p ><span style="font-family:宋体;"><span style="font-size:16px;"> </span></span></p>
<p > </p>
<p ><span style="font-family:宋体;"><span style="font-size:16px;">离开数米，没有任何遮挡，两个APP都能识别到小米手环和STM32W</span></span></p>
<p > </p>
<p ><span style="font-family:宋体;"><span style="font-size:16px;">从房间走出去，离开大概十米不到吧，继续测试</span></span></p>
<p ><span style="font-family:宋体;"><span style="font-size:16px;"> </span></span></p>
<p ><span style="font-family:宋体;"><span style="font-size:16px;"> </span></span></p>
<p > </p>
<p ><span style="font-family:宋体;"><span style="font-size:16px;">两个APP都无法连接到STM32WBA</span></span></p>
<p > </p>
<p ><span style="font-family:宋体;"><span style="font-size:16px;">很奇怪为什么呢？看下程序代码发射功率配置</span></span></p>
<p ><span style="font-family:宋体;"><span style="font-size:16px;">/**</span></span></p>
<p ><span style="font-family:宋体;"><span style="font-size:16px;"> * Define Tx Power</span></span></p>
<p ><span style="font-family:宋体;"><span style="font-size:16px;"> */</span></span></p>
<p ><span style="font-family:宋体;"><span style="font-size:16px;">#define CFG_TX_POWER (0x19) /* 0x19 <=> -0.3 dBm */</span></span></p>
<p > </p>
<p ><span style="font-family:宋体;"><span style="font-size:16px;">ret = aci_hal_set_tx_power_level(1, CFG_TX_POWER);</span></span></p>
<p ><span style="font-family:宋体;"><span style="font-size:16px;"> </span></span></p>
<p > </p>
<p ><span style="font-family:宋体;"><span style="font-size:16px;">修改这个发射功率尝试</span></span></p>
<p ><span style="font-family:宋体;"><span style="font-size:16px;"> </span></span></p>
<p ><span style="font-family:宋体;"><span style="font-size:16px;">不管怎么修改，貌似都是不如小米手环的强度，经常要么两个都搜不到，要么只能搜到小米手环</span></span></p>
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<p>这性能不错呀。</p>
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