OpenMarine

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

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.