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I am trying to build a Smarthome system with NodeMCU. NodeMCU would wire up with relays. How many replays can one NodeMCU control?

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  • It depends how many shift registers or IO expanders you are willing to use.
    – Majenko
    Commented Mar 4, 2020 at 14:03
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    Juraj I know, but I don't know the get those GPIOs things. Can you give me a short answer?
    – will free
    Commented Mar 5, 2020 at 15:01

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