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For questions about the NodeMCU open-source Internet of Things (IoT) platform. Use in conjunction with the "iot" tag.

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Analog multiplexer or analog to digital converter to add analog inputs to NodeMCU?

I asked a similar question here: Simple (low-performance) ADC multiplexer design The final conclusion was that a multiplexer was dead easy to use out of the box. For watering, presumably, your sample …
Toby Eggitt's user avatar