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+--- Thread: I2c Adress with TCA9548A (/showthread.php?tid=3876)
I2c Adress with TCA9548A - croy - 2022-01-17
Please help,
i want to use the TCA9548A I2C multiplexer to read 4 BMP280 sensors.
But the I2C tool shows me only one I2C adress (0X71) instead of the 8 adresses of the multiplexer.
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- 71 -- -- -- -- -- --
so, where is this to change, that i can define the right adresses in the ic2 tool, soi can use signal-k for the sensors on the multiplexer ?
thank for your help
sorry for my english, i'm austrian
RE: I2c Adress with TCA9548A - Sailoog - 2022-01-18
I have no experience with that module but I think you just need one address to get data from your 4 bmp sensors. That is what a multiplexer does. Anyway, I am not sure that the TCA9548A will work with the current OP I2C app. Connecting the 4 bmp sensors in parallel using different addresses would work.