the Raspberry Pi 4 has six SPI controllers, six I2C controllers, and six UARTs – all on its 40-pin header. You can’t make use of all of these at once, but with up to four different connections ...

Now Pi boards have their tiny bits and bigger pieces soldered at the same time through an intrusive reflow soldering process ...

However, everything changed when I bought my first Raspberry Pi Zero in 2016. Since it was a lot less powerful than the mainline Raspberry Pi series, I had to start tinkering with ...