Three I2C busses?

General Discussion
1

I’m in a bit of a pickle here. We are using three I2C pressure sensors in our solution. Due to supply chain issues, they are only available immediately and in low quantities at addresses 0x28 and 0x38 although they make them at five other addresses.

We are able to use two different I2C busses on the Beaglebone Black WIreless. I think it has three I2C buses. I can use two of them with C just fine. Is it possible to use the third one? It seems from documentation that is not available but I am asking here to get more clarity and understanding about this.

Walter

2

We are able to use two different I2C busses on the Beaglebone Black WIreless.
I think it has three I2C buses.

it does, but only the signals for bus 1 and 2 are routed to the p8/9
connectors. bus 0 isn’t exposed.

It seems from documentation that is not available but I am
asking here to get more clarity and understanding about this.

the board schematics at beaglebone-black-wireless/BeagleBone_Black_Wireless_SCH.pdf at master · beagleboard/beaglebone-black-wireless · GitHub
are pretty definitive.

3

Thanks. This is what I thought from the docs too. We were able to find devices at addresses that won’t conflict across the two busses.