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I am a beginner and just start with this light sensor and Pi. I have connected one sensor to the Pi and read the lux value. Now I want to connect multiple TSL2561 sensors to the Pi, so I use a multiplexer TCA9548A between the sensors and the Pi. This multiplexer have 8 channels and it can get up to 8 same-address I2C devices hooked up to one Pi. When I choose 2 or 3 channels at the same time, the reported value is only from the first selected channel. I don't know how to read multiple sensors simultaneously.

Any help will be greatly appreciated.