SPI vs UART

Pick SPI when you need raw throughput to a single fast peripheral -- flash chips, SD cards, TFT displays, ADCs -- where its full-duplex 1-50+ MHz link beats I2C's 3 meets developers should learn uart when working with embedded systems, iot devices, or hardware prototyping, as it provides a simple and reliable method for debugging, logging, or interfacing with sensors and modules. Here's our take.

SPI

Nice Pick

Pick SPI when you need raw throughput to a single fast peripheral -- flash chips, SD cards, TFT displays, ADCs -- where its full-duplex 1-50+ MHz link beats I2C's 3

Pros

• 4 Mbit/s ceiling
• Related to: arduino, raspberry-pi

Cons

• Specific tradeoffs depend on your use case

UART

Developers should learn UART when working with embedded systems, IoT devices, or hardware prototyping, as it provides a simple and reliable method for debugging, logging, or interfacing with sensors and modules

Pros

• It is essential for scenarios requiring low-speed, short-distance communication, such as in robotics, automotive systems, or industrial automation, where minimal wiring and straightforward implementation are advantages
• Related to: embedded-systems, microcontrollers

Cons

• Specific tradeoffs depend on your use case

The Verdict

Use SPI if: You want 4 mbit/s ceiling and can live with specific tradeoffs depend on your use case.

Use UART if: You prioritize it is essential for scenarios requiring low-speed, short-distance communication, such as in robotics, automotive systems, or industrial automation, where minimal wiring and straightforward implementation are advantages over what SPI offers.

The Bottom Line

SPI wins

Pick SPI when you need raw throughput to a single fast peripheral -- flash chips, SD cards, TFT displays, ADCs -- where its full-duplex 1-50+ MHz link beats I2C's 3