Arduino+AS608指纹锁避坑记

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Arduino+AS608指纹锁避坑记

• 1. 关于找不到传感器的问题
• 2. 关于内侧开门的问题

使用Arduino 连接AS608指纹模块，使用 Ardafurit fingureprint sensor library 的示例，
下载时第一次可能出现找不到传感器的情况，大多数时候还是没有问题的，写入之后使用单
独的电源供电，开机却总是找不到传感器（Did not find fingureprint sensor），考虑串
口线接触不良、外部干扰等情况，我通过近50次测试，找到的原因是指纹模块还没有启动起
来。

AS608模块具有自己的处理器和存储设备，通过串口和Arduino 连接，它的启动需要一定时
间，经测试大概需要5至10秒，在电脑连接下载线测试时一般情况下指纹模块已经启动好了，
而在实际应用中直接上电的情况下，如果只做一次测试（如库中的示例程序），往往出现找
不到模块的情况。

解决办法是，不断测试是否成功，如果不成功则使用 resetFunc() 复位，经测试，在硬件
没有问题的情况下，这是很可靠的。

曾将开关连接到处理器上，检测按键输入再开锁，测试发现并不好用，且容易出现BUG。一
是在主板没有加电时开关是不可用的；二是如果按键输入引脚出现脱落等情况，处理器得到
的输入是随机的，可能出现不停自动开关的情况。

解决办法是，将开关接到继电器的输出端。当然，有一个问题是，延时开关的效果要另外实
现了。

此记。

本作品采用知识共享署名-非商业性使用-禁止演绎 3.0 未本地化版本许可协议 进行许可。