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用ModbusTCP 模块通过有线网络来读写本地设备（比如PLC HMI等设备）寄存器信息。 同时通过无线网络登陆goiot.cc网站来运行内嵌的node-red flow。
但看起来内嵌的node-red flow中ModbusTCP模块不能正常工作。
公网访问不了你的本地内网，除非你有配置反向代理或公网映射
