SPI vs I2C vs UART: which interface should I use for my application and why? - Theoretical questions https://forum.etechnophiles.com/basic-electronics-theoretical-questions/spi-vs-i2c-vs-uart-which-interface-should-i-use-for-my-application-and-why/ Hi, Welcome to the eTechnophiles forum. Got a question like, \'What resistor value to choose for your simple LED project\' OR \'Where is the resistor connected to the inbuilt LED in Arduino UNO\'s schematic\' - All will be answered here. Feel free to check out the topics below. en-US Sun, 13 Sep 2026 01:48:58 +0000 wpForo 60 Answer to: SPI vs I2C vs UART: which interface should I use for my application and why? https://forum.etechnophiles.com/basic-electronics-theoretical-questions/spi-vs-i2c-vs-uart-which-interface-should-i-use-for-my-application-and-why/#post-1124 Sat, 11 Oct 2025 05:32:01 +0000 I²C is the best single interface choice for on-board sensors when the priorities are minimal pins, low power, and reliable data.

It uses just two shared wires, is supported by a wide range of low-power sensors, and enables software power-down strategies; address conflicts and pull-up sizing are the main practical considerations, both of which have straightforward hardware or firmware workarounds.

If desired, a follow-up reply can include example pull-up values, suggested load-switch parts for power gating, or a short checklist to confirm sensor address and sleep capability before PCB finalization.

]]> Theoretical questions Jaden https://forum.etechnophiles.com/basic-electronics-theoretical-questions/spi-vs-i2c-vs-uart-which-interface-should-i-use-for-my-application-and-why/#post-1124 SPI vs I2C vs UART: which interface should I use for my application and why? https://forum.etechnophiles.com/basic-electronics-theoretical-questions/spi-vs-i2c-vs-uart-which-interface-should-i-use-for-my-application-and-why/#post-1116 Fri, 10 Oct 2025 05:04:48 +0000 I need to pick one interface before finalizing my PCB and firmware. Short on‑board sensor links; priorities are minimal pins, low power, and reliable data. Which would you choose and why?]]> Theoretical questions techy ishan https://forum.etechnophiles.com/basic-electronics-theoretical-questions/spi-vs-i2c-vs-uart-which-interface-should-i-use-for-my-application-and-why/#post-1116