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 ...

At this point, there are no shortage of impressive hacks for the Raspberry Pi ... that is needed to interface the QN8035 with the Pi’s I2C bus. After demonstrating that the FM tuner could ...