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比如我想让小车停在小球前10cm按照像素点判断距离的话如果小球被其他颜色小球遮挡怎么办，能不能识别一部分轮廓算出直径测量距离？
为什么我输出0串口助手上面看见的hex是0a 30 0d?
open mv 串口通信发送一个十六进制的0用什么代码