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Building a Shower Timer with an ESP8266 « Adafruit Industries – Makers, hackers, artists, designers and engineers!
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Timer system with nodeMCU (Turn on/off the power by setting the timer) , 2 periods timer / an relay - YouTube
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Arduino-er: ESP32 (NodeMCU-32S) capture Analog input, display on SPI ILI9341 screen in waveform, base on Timer Interrupt.
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