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How to create an office or studio status indicator and doorbell with NodeMCU Part #1

This is a fun project, if you ever wanted to show your status at your desk or outside your desk and you wanted to build it yourself then this is the tutorial for you. Your total parts cost is going to be less than $40 and you may already have the parts you need if you have some electronics stuff lying around. I am going to be using Mongoose OS for development framework and cli.

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