The AQM0802 communicate by the I2C protocol. Let’s activate I2C protocol on the Raspberry Pi.
Although I’m not familiar to Linux, I’ll customize from the original RASPBIAN.
In the past, I thought I couldn’t set up Raspberry Pi without an HDMI display. But now, I can do it!
There are quite a few types of Raspberry Pi. I tried to summarize simply from the old type to the new type.