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To achieve this he created Fade, a custom programming language/framework for controlling LED animations from the ESP32. Fade is written for addressable RGB LEDs like the Neopixel/WS2812.
The ESP32 drives the steppers via L298N H-bridge drivers, but it’s hard to say if there’s an RTC chip or if the microcontroller is just getting time via an NTP server.
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You too can make this cool e-ink Pomodoro timer with an ESP32 - MSN
ESP32 (I used an AZDelivery ESP32 NodeMCU) WaveShare 4.26inch e-Paper display HAT, 800x480 (link) KY-040 rotary encoder with button A single WS2812 LED (could be replaced with a simple RGB LED)A ...
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