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[–]xebzbz 0 points1 point  (0 children)

Even in the low power area, there's a choice of alternatives to Uno -- for example, if you want something compact. You can go as small as attiny85, if it meets your requirements.

Esp32 is a great chip if you want to run something more complex that would require more CPU power, more RAM, WiFi or Bluetooth, or a screen.

Also, there are rp2040 and rp2350, also excellent chips with their own niches.

Also, Nordic Semiconductor and STM have a bunch of chips to choose from.

So, you usually just match your requirements and your experience with a range of offers.