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 ...

Multiple Kickstarter project creator Doug Gilliland has now launched his 17th project via the crowdfunding website, offering a Raspberry Pi I2C Multiplexer for the small single board PC.

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 ...

The Raspberry Pi 4’s GPIO header also supports more connections, with UART, SPI, and I2C interfaces each supported on four additional pins, and with fixed support for clock stretching over I2C ...

The latest board from the team enables you to have up to 4 I2C busses connected to either your Arduino development board or Raspberry Pi mini PC and is also equipped with Grove Connectors and LEDs.

The Raspberry Pi dominated the maker scene for a decade ... and the GPIOs (including 6× UART, 7× I2C, 3× I2S, 2× PWM). From the user’s point of view, the RP1 chip is primarily noticeable ...