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Replying to @josecastillo

This is with the Feather M0. An M4 Express runs this at about 870µA, but a lot of that is the Neopixel; if you were to remove it or cut its power trace, the SAM D51 has sleep modes that go far lower. Stoked to test with the new ESP32-S2 Feather, which was optimized for low power!

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