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by geoffhill 1930 days ago
For cheap esp32-based smartwatches and wristbands, I've had good success with LILYGO and the esp-idf toolchain.

$18 T-Wristband: https://www.aliexpress.com/item/4000527495064.html

$26 T-Watch-2020: https://www.aliexpress.com/item/4000971508364.html

esp-idf: https://github.com/espressif/esp-idf