前言
最近树莓派4b公布了8gb的版本，这么大的内存用在嵌入式设施上，几乎是为了深度计算而生，果决动手了一块，遂开启了一轮踩坑之旅。为了防止反复网上已有的树莓派教程，后续系列文章，我尽量以2020年为基准，先打造一个最新最稳固的软硬件开发环境，再在其上构建AI利用。比方抉择构建OpenCV 4.4，pyTorch 1.6和1.7，Tensorflow 2.1，而后在下面跑yolo v5利用，用intel NCS2减速等等…
这篇咱们先来选用一些必要的硬件设施，其中表明必备的，则是运行零碎所要求的，型号规格尽量保持一致，可选的局部可依据理论AI利用抉择即可。
<section mpa-from-tpl="t" style="white-space: normal;" data-mpa-powered-by="yiban.io">
<section mpa-from-tpl="t" style="margin-top: 10px; margin-bottom: 10px; text-align: center;">
<section mpa-from-tpl="t" style="padding-right: 6px; padding-left: 6px; display: inline-block; vertical-align: middle;"> <section mpa-is-content="t" mpa-from-tpl="t" style="padding-right: 10px; padding-left: 10px; border-bottom: 2px solid rgb(0, 122, 170);"> <span style="font-size: 18px; color: rgb(0, 122, 170);"><strong mpa-from-tpl="t"> 树莓派4b（必备，4gb或8gb）<mpchecktext contenteditable="false" id="1601710626254_0.06194475821511003"> </mpchecktext></strong></span> </section> <section mpa-from-tpl="t" style="margin-top: -4px;"> <section mpa-from-tpl="t" style="margin-left: -6px; float: left; width: 6px; height: 6px; background-color: rgb(0, 122, 170);"> <br> </section> <section mpa-from-tpl="t" style="margin-right: -6px; float: right; width: 6px; height: 6px; background-color: rgb(0, 122, 170);"> <span style="font-size: 15px; text-align: justify; text-indent: 2em;"></span> <br> </section> </section></section></section>
</section>
树莓派4b（必备，4gb或8gb）
如果是开发折腾用举荐8gb版本，无论是tensorflow还是pytorch，甚至想在树莓派上开个chrome查下文档，都占相当大的内存。不过由理论应用来看，4gb的版本足已满足以后需要，性价比很高，估算无限的优先选择。而2gb的版本不举荐，在编译大型利用或跑推理模型的时候容易OOM，须要设置很大替换内存，会显著的拖慢编译速度，极度缩减tf卡的寿命。
<section mpa-from-tpl="t" style="white-space: normal;" data-mpa-powered-by="yiban.io">
<section mpa-from-tpl="t" style="margin-top: 10px; margin-bottom: 10px; text-align: center;">
<section mpa-from-tpl="t" style="padding-right: 6px; padding-left: 6px; display: inline-block; vertical-align: middle;"> <section mpa-is-content="t" mpa-from-tpl="t" style="padding-right: 10px; padding-left: 10px; border-bottom: 2px solid rgb(0, 122, 170);"> <span style="font-size: 18px; color: rgb(0, 122, 170);"><strong mpa-from-tpl="t"> MircoSD卡（必备，举荐64gb）<mpchecktext contenteditable="false" id="1601710626254_0.06194475821511003"> </mpchecktext></strong></span> </section> <section mpa-from-tpl="t" style="margin-top: -4px;"> <section mpa-from-tpl="t" style="margin-left: -6px; float: left; width: 6px; height: 6px; background-color: rgb(0, 122, 170);"> <br> </section> <section mpa-from-tpl="t" style="margin-right: -6px; float: right; width: 6px; height: 6px; background-color: rgb(0, 122, 170);"> <span style="font-size: 15px; text-align: justify; text-indent: 2em;"></span> <br> </section> </section></section></section>
</section>
MircoSD卡（必备，举荐64gb）
倡议多买几张，树莓派上能够装置各种零碎，进行多个备份。举荐64g的是因为这是当下国产卡比拟成熟便宜的型号，20块左右，白菜价值得动手。
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<section mpa-from-tpl="t" style="margin-top: 10px; margin-bottom: 10px; text-align: center;">
<section mpa-from-tpl="t" style="padding-right: 6px; padding-left: 6px; display: inline-block; vertical-align: middle;"> <section mpa-is-content="t" mpa-from-tpl="t" style="padding-right: 10px; padding-left: 10px; border-bottom: 2px solid rgb(0, 122, 170);"> <span style="font-size: 18px; color: rgb(0, 122, 170);"><strong mpa-from-tpl="t"> 读卡器（必备）<mpchecktext contenteditable="false" id="1601710626254_0.06194475821511003"> </mpchecktext></strong></span> </section> <section mpa-from-tpl="t" style="margin-top: -4px;"> <section mpa-from-tpl="t" style="margin-left: -6px; float: left; width: 6px; height: 6px; background-color: rgb(0, 122, 170);"> <br> </section> <section mpa-from-tpl="t" style="margin-right: -6px; float: right; width: 6px; height: 6px; background-color: rgb(0, 122, 170);"> <span style="font-size: 15px; text-align: justify; text-indent: 2em;"></span> <br> </section> </section></section></section>
</section>
读卡器（必备）
烧写镜像或是读写配置文件都须要用到，SD卡套或usb读卡器都行，笔记本的话用卡套不便些。读卡器能够思考usb 3.0，不过大多数状况2.0的480Mbps匹配MircoSDXC的速度也够用了。
<section mpa-from-tpl="t" style="white-space: normal;" data-mpa-powered-by="yiban.io">
<section mpa-from-tpl="t" style="margin-top: 10px; margin-bottom: 10px; text-align: center;">
<section mpa-from-tpl="t" style="padding-right: 6px; padding-left: 6px; display: inline-block; vertical-align: middle;"> <section mpa-is-content="t" mpa-from-tpl="t" style="padding-right: 10px; padding-left: 10px; border-bottom: 2px solid rgb(0, 122, 170);"> <span style="font-size: 18px; color: rgb(0, 122, 170);"><strong mpa-from-tpl="t"> 摄像头（必备）<mpchecktext contenteditable="false" id="1601710626254_0.06194475821511003"> </mpchecktext></strong></span> </section> <section mpa-from-tpl="t" style="margin-top: -4px;"> <section mpa-from-tpl="t" style="margin-left: -6px; float: left; width: 6px; height: 6px; background-color: rgb(0, 122, 170);"> <br> </section> <section mpa-from-tpl="t" style="margin-right: -6px; float: right; width: 6px; height: 6px; background-color: rgb(0, 122, 170);"> <span style="font-size: 15px; text-align: justify; text-indent: 2em;"></span> <br> </section> </section></section></section>
</section>
摄像头（必备）
跑CV类的AI利用必备，举荐采纳CSI的视频接口，树莓派的USB口太紧凑了，USB的摄像头不肯定有地位能够插。必要的时候还须要扩大一个USB HUB解决多外设的问题。如果要跑工业CV利用，能够选用 IMX477R 高清摄像头配相应的长焦和微距镜头。
<section mpa-from-tpl="t" style="white-space: normal;" data-mpa-powered-by="yiban.io">
<section mpa-from-tpl="t" style="margin-top: 10px; margin-bottom: 10px; text-align: center;">
<section mpa-from-tpl="t" style="padding-right: 6px; padding-left: 6px; display: inline-block; vertical-align: middle;"> <section mpa-is-content="t" mpa-from-tpl="t" style="padding-right: 10px; padding-left: 10px; border-bottom: 2px solid rgb(0, 122, 170);"> <span style="font-size: 18px; color: rgb(0, 122, 170);"><strong mpa-from-tpl="t"> 散热外壳（必备）<mpchecktext contenteditable="false" id="1601710626254_0.06194475821511003"> </mpchecktext></strong></span> </section> <section mpa-from-tpl="t" style="margin-top: -4px;"> <section mpa-from-tpl="t" style="margin-left: -6px; float: left; width: 6px; height: 6px; background-color: rgb(0, 122, 170);"> <br> </section> <section mpa-from-tpl="t" style="margin-right: -6px; float: right; width: 6px; height: 6px; background-color: rgb(0, 122, 170);"> <span style="font-size: 15px; text-align: justify; text-indent: 2em;"></span> <br> </section> </section></section></section>
</section>
散热外壳（必备）
如果要长时间跑AI模型，几块散热片是远远不够的，举荐用乌金铠甲（间接在CPU上用3M的散热胶把热量引到整个外壳上）。这一代的树莓派CPU根底温度很高，轻易跑个桌面就50℃多了，满负荷状态下能够稳固的跑在85℃上一整天，必要的时候能够开启风扇降温（比拟吵）。
<section mpa-from-tpl="t" style="white-space: normal;" data-mpa-powered-by="yiban.io">
<section mpa-from-tpl="t" style="margin-top: 10px; margin-bottom: 10px; text-align: center;">
<section mpa-from-tpl="t" style="padding-right: 6px; padding-left: 6px; display: inline-block; vertical-align: middle;"> <section mpa-is-content="t" mpa-from-tpl="t" style="padding-right: 10px; padding-left: 10px; border-bottom: 2px solid rgb(0, 122, 170);"> <span style="font-size: 18px; color: rgb(0, 122, 170);"><strong mpa-from-tpl="t"> 充电器5v3A（必备）<mpchecktext contenteditable="false" id="1601710626254_0.06194475821511003"> </mpchecktext></strong></span> </section> <section mpa-from-tpl="t" style="margin-top: -4px;"> <section mpa-from-tpl="t" style="margin-left: -6px; float: left; width: 6px; height: 6px; background-color: rgb(0, 122, 170);"> <br> </section> <section mpa-from-tpl="t" style="margin-right: -6px; float: right; width: 6px; height: 6px; background-color: rgb(0, 122, 170);"> <span style="font-size: 15px; text-align: justify; text-indent: 2em;"></span> <br> </section> </section></section></section>
</section>
充电器5v3A（必备）
官网电源和国产配套电源（带开关不便重启）都能满足需要，一般手机充电器个别才2A，有太多外设的话，电源的压力就很大。连贯太多外设的跑利用时候，会看到屏幕右上方的闪电亏电标记。
<section mpa-from-tpl="t" style="white-space: normal;" data-mpa-powered-by="yiban.io">
<section mpa-from-tpl="t" style="margin-top: 10px; margin-bottom: 10px; text-align: center;">
<section mpa-from-tpl="t" style="padding-right: 6px; padding-left: 6px; display: inline-block; vertical-align: middle;"> <section mpa-is-content="t" mpa-from-tpl="t" style="padding-right: 10px; padding-left: 10px; border-bottom: 2px solid rgb(0, 122, 170);"> <span style="font-size: 18px; color: rgb(0, 122, 170);"><strong mpa-from-tpl="t"> 无线键盘鼠标（可选）<mpchecktext contenteditable="false" id="1601710626254_0.06194475821511003"> </mpchecktext></strong></span> </section> <section mpa-from-tpl="t" style="margin-top: -4px;"> <section mpa-from-tpl="t" style="margin-left: -6px; float: left; width: 6px; height: 6px; background-color: rgb(0, 122, 170);"> <br> </section> <section mpa-from-tpl="t" style="margin-right: -6px; float: right; width: 6px; height: 6px; background-color: rgb(0, 122, 170);"> <span style="font-size: 15px; text-align: justify; text-indent: 2em;"></span> <br> </section> </section></section></section>
</section>
无线键盘鼠标（可选）
如果想间接把树莓派当PC用，配一个Nano的无线键鼠，有物理输出设施，会不便调试代码。没有的话，也能够用VNC来远程桌面拜访，所以依据须要可选。
<section mpa-from-tpl="t" style="white-space: normal;" data-mpa-powered-by="yiban.io">
<section mpa-from-tpl="t" style="margin-top: 10px; margin-bottom: 10px; text-align: center;">
<section mpa-from-tpl="t" style="padding-right: 6px; padding-left: 6px; display: inline-block; vertical-align: middle;"> <section mpa-is-content="t" mpa-from-tpl="t" style="padding-right: 10px; padding-left: 10px; border-bottom: 2px solid rgb(0, 122, 170);"> <span style="font-size: 18px; color: rgb(0, 122, 170);"><strong mpa-from-tpl="t"> HDMI 转接线（可选）<mpchecktext contenteditable="false" id="1601710626254_0.06194475821511003"> </mpchecktext></strong></span> </section> <section mpa-from-tpl="t" style="margin-top: -4px;"> <section mpa-from-tpl="t" style="margin-left: -6px; float: left; width: 6px; height: 6px; background-color: rgb(0, 122, 170);"> <br> </section> <section mpa-from-tpl="t" style="margin-right: -6px; float: right; width: 6px; height: 6px; background-color: rgb(0, 122, 170);"> <span style="font-size: 15px; text-align: justify; text-indent: 2em;"></span> <br> </section> </section></section></section>
</section>
HDMI 转接线（可选）
树莓派4b的HDMI口是micro的，如果要连贯HDMI的显示器，则须要一根micro HDMI视频线或者转接头。心愿双显示输入的话，那要买两根micro HDMI视频线，因为树莓派的视频接口很近，同插2个转接口会打架...
<section mpa-from-tpl="t" style="white-space: normal;" data-mpa-powered-by="yiban.io">
<section mpa-from-tpl="t" style="margin-top: 10px; margin-bottom: 10px; text-align: center;">
<section mpa-from-tpl="t" style="padding-right: 6px; padding-left: 6px; display: inline-block; vertical-align: middle;"> <section mpa-is-content="t" mpa-from-tpl="t" style="padding-right: 10px; padding-left: 10px; border-bottom: 2px solid rgb(0, 122, 170);"> <span style="font-size: 18px; color: rgb(0, 122, 170);"><strong mpa-from-tpl="t"> intel神经棒NCS2（可选）<mpchecktext contenteditable="false" id="1601710626254_0.06194475821511003"> </mpchecktext></strong></span> </section> <section mpa-from-tpl="t" style="margin-top: -4px;"> <section mpa-from-tpl="t" style="margin-left: -6px; float: left; width: 6px; height: 6px; background-color: rgb(0, 122, 170);"> <br> </section> <section mpa-from-tpl="t" style="margin-right: -6px; float: right; width: 6px; height: 6px; background-color: rgb(0, 122, 170);"> <span style="font-size: 15px; text-align: justify; text-indent: 2em;"></span> <br> </section> </section></section></section>
</section>
intel神经棒NCS2（可选）
AI利用往往是会进行大量浮点数计算，个别会采纳GPU进行运算，通过GPU弱小的浮点数运算能力，能够无效晋升神经网络运算的效力，但若是要将神经网络运算放到如树莓派的单板计算机进行运算，却往往受限于单板计算机的GPU运算效力，使得神经网络运算的速度有余。
尽管树莓派4b的运行速度是3b的3倍以上，但跑AI推理还是无奈达到实时（实测跑yolo v4s，0.3fps），然而透过单板计算机进行AIoT的利用促成了边缘运算技术的倒退，若单板计算机要在神经网络运算上取得较佳的运算效力，能够思考透过USB即插即用的外接神经运算安装解决神经网络运算的效力需要。
Google Coral Edge TPU USB减速棒 或者 intel Neural Compute Stick 2 都是能够应用的，就性价比来说，NCS2会更高些。
<section mpa-from-tpl="t" style="white-space: normal;" data-mpa-powered-by="yiban.io">
<section mpa-from-tpl="t" style="margin-top: 10px; margin-bottom: 10px; text-align: center;">
<section mpa-from-tpl="t" style="padding-right: 6px; padding-left: 6px; display: inline-block; vertical-align: middle;"> <section mpa-is-content="t" mpa-from-tpl="t" style="padding-right: 10px; padding-left: 10px; border-bottom: 2px solid rgb(0, 122, 170);"> <span style="font-size: 18px; color: rgb(0, 122, 170);"><strong mpa-from-tpl="t"> usb延长线或usb hub（可选）<mpchecktext contenteditable="false" id="1601710626254_0.06194475821511003"> </mpchecktext></strong></span> </section> <section mpa-from-tpl="t" style="margin-top: -4px;"> <section mpa-from-tpl="t" style="margin-left: -6px; float: left; width: 6px; height: 6px; background-color: rgb(0, 122, 170);"> <br> </section> <section mpa-from-tpl="t" style="margin-right: -6px; float: right; width: 6px; height: 6px; background-color: rgb(0, 122, 170);"> <span style="font-size: 15px; text-align: justify; text-indent: 2em;"></span> <br> </section> </section></section></section>
</section>
usb延长线或usb hub（可选）
树莓派的USB口都集中在一起，直插设施的话（比方NCS2）会把其余的口都挡住，所以多外设的话，最好再配一些usb延长线或是usb hub扩大接口数量。
<section mpa-from-tpl="t" style="white-space: normal;" data-mpa-powered-by="yiban.io">
<section mpa-from-tpl="t" style="margin-top: 10px; margin-bottom: 10px; text-align: center;">
<section mpa-from-tpl="t" style="padding-right: 6px; padding-left: 6px; display: inline-block; vertical-align: middle;"> <section mpa-is-content="t" mpa-from-tpl="t" style="padding-right: 10px; padding-left: 10px; border-bottom: 2px solid rgb(0, 122, 170);"> <span style="font-size: 18px; color: rgb(0, 122, 170);"><strong mpa-from-tpl="t"> 树莓派UPS或充电宝（可选）<mpchecktext contenteditable="false" id="1601710626254_0.06194475821511003"> </mpchecktext></strong></span> </section> <section mpa-from-tpl="t" style="margin-top: -4px;"> <section mpa-from-tpl="t" style="margin-left: -6px; float: left; width: 6px; height: 6px; background-color: rgb(0, 122, 170);"> <br> </section> <section mpa-from-tpl="t" style="margin-right: -6px; float: right; width: 6px; height: 6px; background-color: rgb(0, 122, 170);"> <span style="font-size: 15px; text-align: justify; text-indent: 2em;"></span> <br> </section> </section></section></section>
</section>
树莓派UPS或充电宝（可选）
如果想外出采集数据或是试验AI利用的话，还须要装备一个足够大的充电宝。前文提到一般充电宝接口电流最大2A，如要更大电流，就须要采纳两节18650那种提供稳固的电源反对。
<section mpa-from-tpl="t" style="white-space: normal;" data-mpa-powered-by="yiban.io">
<section mpa-from-tpl="t" style="margin-top: 10px; margin-bottom: 10px; text-align: center;">
<section mpa-from-tpl="t" style="padding-right: 6px; padding-left: 6px; display: inline-block; vertical-align: middle;"> <section mpa-is-content="t" mpa-from-tpl="t" style="padding-right: 10px; padding-left: 10px; border-bottom: 2px solid rgb(0, 122, 170);"> <span style="font-size: 18px; color: rgb(0, 122, 170);"><strong mpa-from-tpl="t"> 树莓派 4G模块（可选）<mpchecktext contenteditable="false" id="1601710626254_0.06194475821511003"> </mpchecktext></strong></span> </section> <section mpa-from-tpl="t" style="margin-top: -4px;"> <section mpa-from-tpl="t" style="margin-left: -6px; float: left; width: 6px; height: 6px; background-color: rgb(0, 122, 170);"> <br> </section> <section mpa-from-tpl="t" style="margin-right: -6px; float: right; width: 6px; height: 6px; background-color: rgb(0, 122, 170);"> <span style="font-size: 15px; text-align: justify; text-indent: 2em;"></span> <br> </section> </section></section></section>
</section>
树莓派 4G模块（可选）
在户外的车载我的项目或AIoT利用中，4G模块能够提供无线的近程连贯。能够提供云端推理或是传感器数据云端存储，实现4G高速上网，无线通信，打电话，发短信，寰球定位等性能。
| # | 硬件清单 | 规格 |
|---|---|---|
| 1 | 树莓派4b | 4gb，8gb |
| 2 | microSD卡 | 64gb |
| 3 | 读卡器 | 卡套 或 usb |
| 4 | 摄像头 | CSI 接口 |
| 5 | 散热外壳 | 乌金铠甲 |
| 6 | 充电器 | 5v 3A |
| 7 | 无线键盘鼠标 | （可选） |
| 8 | HDMI 转接线 | （可选） |
| 9 | intel神经棒NCS2 | （可选） |
| 10 | Usb延长线或usb hub | （可选） |
| 11 | 树莓派UPS或充电宝 | （可选） |
| 12 | 树莓派 4G模块 | （可选） |
上述器件动手后，一顿操作将他们组合到一起就搞定硬件平台了。
整体上来看，绝对于 NVIDIA的 Jetson 和Google的 Coral 而言，树莓派是一个比拟低廉的边缘计算设施，对于大规模对老本敏感的传感器网络来说，是一个很好的可选计划。
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<section mpa-from-tpl="t" style="margin: 0px; padding: 0px; max-width: 100%; overflow-wrap: break-word !important; box-sizing: border-box !important; display: inline-block; overflow: hidden; background-image: url("https://mmbiz.qpic.cn/mmbiz_png/TN05MmJLxMrlU7icJguGC4D6q0lvcvo6vFc30VQACctEHIiacKKiaZeZ2uicTnaibMZTyibyNICNibR5J2l1qntIw55Vw/640?wx_fmt=png"); background-repeat: no-repeat;"> <section mpa-from-tpl="t" style="margin: 0px; padding: 0px; max-width: 100%; overflow-wrap: break-word !important; box-sizing: border-box !important; display: inline-block; overflow: hidden; background-image: url("https://mmbiz.qpic.cn/mmbiz_png/fgnkxfGnnkR1uk8CRofebYK8wouGoGZiamS71qqvUc4bh8R0IUib4kgXctsCKMCl8aFnKs7mTewwzBiaWOZmbBCUA/640?wx_fmt=png"); background-repeat: no-repeat; background-position: right bottom;"> <section mpa-from-tpl="t" style="margin: 0px; padding: 25px; max-width: 100%; overflow-wrap: break-word !important; box-sizing: border-box !important;"> <p style="margin: 0px; padding: 0px; clear: both; max-width: 100%; overflow-wrap: break-word !important; box-sizing: border-box !important; min-height: 1em;"> <strong style="margin: 0px; padding: 0px; max-width: 100%; overflow-wrap: break-word !important; box-sizing: border-box !important; font-size: 15px;"><span style="margin: 0px; padding: 0px; max-width: 100%; overflow-wrap: break-word !important; box-sizing: border-box !important; background-color: rgb(255, 255, 255); color: rgb(62, 62, 62);"><br class="Apple-interchange-newline">下一篇</span></strong> <br style="margin: 0px; padding: 0px; max-width: 100%; overflow-wrap: break-word !important; box-sizing: border-box !important;"> </p> <p style="margin: 0px; padding: 0px; clear: both; max-width: 100%; overflow-wrap: break-word !important; box-sizing: border-box !important; min-height: 1em; white-space: normal; line-height: 25.6px; color: rgb(62, 62, 62); background-color: rgb(255, 255, 255);"> <strong mpa-from-tpl="t" style="margin: 0px; padding: 0px; max-width: 100%; overflow-wrap: break-word !important; box-sizing: border-box !important; font-size: 14px;">咱们将搭建树莓派的软件环境，</strong> </p> <p style="margin: 0px; padding: 0px; clear: both; max-width: 100%; overflow-wrap: break-word !important; box-sizing: border-box !important; min-height: 1em; white-space: normal; line-height: 25.6px; color: rgb(62, 62, 62); background-color: rgb(255, 255, 255);"> <strong mpa-from-tpl="t" style="margin: 0px; padding: 0px; max-width: 100%; overflow-wrap: break-word !important; box-sizing: border-box !important; font-size: 14px;">介绍一些罕用的工具软件，</strong> </p> <p style="margin: 0px; padding: 0px; clear: both; max-width: 100%; overflow-wrap: break-word !important; box-sizing: border-box !important; min-height: 1em; white-space: normal; line-height: 25.6px; color: rgb(62, 62, 62); background-color: rgb(255, 255, 255);"> <strong mpa-from-tpl="t" style="margin: 0px; padding: 0px; max-width: 100%; overflow-wrap: break-word !important; box-sizing: border-box !important; font-size: 14px;">不便后续的开发工作，</strong> </p> <p style="margin: 0px; padding: 0px; clear: both; max-width: 100%; overflow-wrap: break-word !important; box-sizing: border-box !important; min-height: 1em; white-space: normal; line-height: 25.6px; color: rgb(62, 62, 62); background-color: rgb(255, 255, 255);"> <strong mpa-from-tpl="t" style="margin: 0px; padding: 0px; max-width: 100%; overflow-wrap: break-word !important; box-sizing: border-box !important; font-size: 14px;">敬请期待…</strong> </p> </section> </section></section></section>
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下一篇预报
咱们将搭建树莓派的软件环境，
介绍一些罕用的工具软件，
不便后续的开发工作，
敬请期待…