상황
When multiple identical I2C slaves share the same address, a multiplexer allows the master to select one at a time.
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01
Use a multiplexer to switch I2C bus lines to individual slaves
02
Master first sends a command to the mux to select the target channel
03
Slaves share SDA/SCL lines but are isolated by the mux
Systems with multiple identical I2C sensors or actuators that cannot be assigned unique addresses.