昨天第一次连接使用时还能读出Registers中的数值,今天使用发现提示Not able to find a free communications adapter,请问这是哪里有问题
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昨天第一次连接使用时还能读出Registers中的数值,今天使用发现提示Not able to find a free communications adapter,请问这是哪里有问题