Multiple i2c devices on separate i2c ports?

[ardoyouknowwhoiam]

Hi all,

This might be a silly question but I haven't been able to figure it out. I have an IMU and OLED display connected to i2c-0 and i2c-1 ports on a Teensy. I'm using the Wire library which is allowing me to receive comms from the IMU as it is on the default i2c pins. But I would appear that I can't read the OLED because it's on different i2c lines. Do I have to modify a library to do this?

(I would rather not change the hardware if it is possible through software -- so I would not like to put them both on the same i2c port).

Any advice would be appreciated! Thanks

Thanks.

[b707]

@ardoyouknowwhoiam

I would not like to put them both on the same i2c port

why? I2c is multi-slave bus, connecting several clients to the single bus is standard procedure

[PaulRB]

It may be possible, depending on the library you use. The i2c-1 port probably has a Wire1 object. If the library allows you to specify the Wire object to use in its constructor, it should be pretty easy.

For example

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire1, OLED_RESET);

But if the library is hard-coded to use the Wire object, then the library will need to be changed.