A great board to have if you need to expand the I2C addresses you’re using. The TCA9548A splits one I2C bus into 8 independent channels, so you can run multiple identical sensors — OLEDs, colour sensors, IMUs — without address collisions.
You can stack up to 8 of these multiplexers on the same bus (using addresses 0x70–0x77) for up to 64 devices total — great for complex multi-sensor wearable builds.
