This command allows the bus master to read the DS18B20’s 8-bit family code, unique 48-bit serial
number, and 8-bit CRC. This command can only be used if there is a single DS18B20 on the bus. If
more than one slave is present on the bus, a data collision will occur when all slaves try to transmit at the
same time (open drain will produce a wired AND result).
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number, and 8-bit CRC. This command can only be used if there is a single DS18B20 on the bus. If
more than one slave is present on the bus, a data collision will occur when all slaves try to transmit at the
same time (open drain will produce a wired AND result).
英文较差，这段不是说：仅能单颗芯片在总线上，才能这样使用；多颗会发生冲突。??
感觉这方案不可行。
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