Device Tree • Re: pca9548a does not create sub busses on I2C bus 4

I wanted to add a pca9548a multiplexer to my pi 4. This worked fine when using the default I2C bus. Sadly this bus is now in use because of the Argon One V2 case.
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sorry, don't get that! is there an address conflicts with devices in your Argon One V2 case or why can't you use I2C-1 (i2c_arm)? you can have more than 100 devices on a single I2C bus as long as they have individual addresses.

If you want to connect the mux to I2C-4 on a Pi4 then you're config.txt needs to havethat should enabled the multiplexer at address 0x70 (as that is the default the parameter can be omitted) on I2C-4, with the multiplexed busses starting from number 12

leaving I2C-10/11 unused will not cause conflicts when adding a camera/DSI display

Statistics: Posted by aBUGSworstnightmare — Sun Jun 15, 2025 6:58 am

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