I have the Hyperpixel4 rectangle connected to a Pi4 and then I have wired up the IOexpander which I’m hoping to use alongside the screen.
As advised I have used the symlink.
sudo ln -s /dev/i2c-3 /dev/i2c-1
When I run the ioexpander example code I get the error “No such file or directory: ‘/dev/i2c-1’”
If I run lsmod neither i2c-1 or i2c-3 exist.
Any advice on this and getting the ioexpander to work with the hyperpixel4 is greatly apreciated.
Does anyone have any advice or experience with this? I would be really grateful.
I’m using these instructions:
https://learn.pimoroni.com/article/getting-started-with-hyperpixel-4
It seems the IOExtender is the perfect fit for the hyperpixel-4 so was really hoping this would work without any problems.
Thanks.
Yay! Managed to figure this one out which isn’t bad for a newbie.
In case someone else has this problem I scanned for the I2C devices before and after adding the HyperPixel using ls /dev/i2*.
The i2c was actually /dev/i2c-22
I was then able to amend this according to the instructions:
sudo ln -s /dev/i2c-3 /dev/i2c-1
Replacing i2c-3 with the actual device number.