You just found the perfect I2C sensor, and you want to wire up two or three or more of them to your when you realize “Uh oh, this chip has a fixed I2C address, and from what I know about I2C, you cannot have two devices with the same address on the same SDA/SCL pins!” Are you out of luck? You would be, if you didn't have the CJMCU-9548 1-to-8 I2C multiplexer.
Finally, a way to get up to 8 same-address I2C devices hooked up to one microcontroller This multiplexer acts as a gatekeeper, shuttling the commands to the selected set of I2C pins with your command.
Using it is fairly straight-forward: the multiplexer itself is on I2C address 0x70 (but can be adjusted from 0x70 to 0x77) and you simply write a single byte with the desired multiplexed output number to that port, and bam – any future I2C packets will get sent to that port. In theory, you could have 8 of these multiplexers on each of 0x70-0x77 addresses in order to control 64 of the same-I2C-addressed-part.
The chip itself is 1.8V - 5V compliant so you can use it with any logic level.
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