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我用openmv连接ch340模块,想反回一个自定义的字符串,但是无法返回?这个字符串是在openmv ide编的程序中自定义的。
这就是最简单的串口发送字符串噻
http://book.openmv.cc/MCU/serial2.html
需要将数据线连上吗?
我试过如果将openmv模块用数据线连接电脑,tx和rx端连接ch340模块的话是可以将字符串发送到ch340的,但是卸下数据线就不行了。
OpenMV 是不是没供电 是不是没有脱机运行?