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liupei1899
三人行必有我師
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樓主  發(fā)表于: 2014-11-28 20:56
通訊真讓人頭疼 實(shí)在搞不懂 既然USB口方便好用 為何還要用九針串口 既然485好 為何還要用232 為什么?為什么??為什么
hengliang289
出學(xué)留國
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1樓  發(fā)表于: 2014-12-05 13:51
485在設備，232在PC，不過(guò)現在以太網(wǎng)口用的比較多

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