Author Archive: fk

There is a battery compartment for three A batteries (4.5 V) hidden behind the door today that will     10. Tag power the board independently of a power outlet. For economical battery operation, we have the deepsleep mode. This mode…
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There is a photo transistor hidden behind the door today. We will use it to measure the ambient brightness. The potentiometer is in series with the phototransistor potentiometer in our circuit and you will be able to change the sensor…
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On the eighth day you will find a potentiometer behind the door. We are going to use it as voltage divider. You can set a voltage between 0 V and 3.3 V, which is measured by the board and sent…
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There is a red LED hidden behind the door today. We are going to use this to build a simple stairway light with web interface. We will thus build the following circuit and, of course, activate today’s program. Locate the…
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Behind the sixth door of the Advent calendar is a 1 kOhm resistor, which we will use tomorrow. Today we will continue with Node-RED and try out the touch function of the board. As always you will select the program…
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Behind the fifth door of the Advent calendar is a button and we are going to use it today in our experiment instead of the boot button. We will connect the button to pin 18 and GND in such a…
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Behind the fourth door of the Advent calendar is a set of cables that is very useful for the upcoming hardware setup. But today in our project we are going to look at the JSON format; what is it and…
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Today’s door reveals another breadboard. It can be plugged into the board of yesterday. The NodeESP board can now be placed on both boards together. However, this constellation will not work for everyone. Breaking off the side parts of the…
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On the second day you will find a breadboard for the upcoming experiments hidden behind the door. I would recommend however, that you do not yet plug your NodeESP into the board. Let’s first look today at how we launch…
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This is the first day of the 2018 Advent calendar project. The time has come to open the first window. Behind this calendar door you will find a microcontroller board. The main task today is to connect to the home…
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