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请问大佬们opemmv3怎么直接控制4轴机械臂？需要用到扩展版吗？直接从引脚输出pwm高低电平的话，我见servo呢个模块只有P7-P8的引脚，剩下一个舵机咋控制？
4个舵机只能用舵机扩展板了。
https://singtown.com/learn/50057/