SpaceState ESP


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Project: SpaceState nodeMCU ESP8266 Clock
SpaceState ESP Picture.jpg
Name SpaceState nodeMCU ESP8266 Clock
Initiator zeno4ever
Status 100%
Skills Basic Electronics, Arduino Software (C)
Summary Show space open/close state with nodeMCU / ESP-12E / ESP8266

I wanted to see if the TkkrLab hackerspace is open on my clock. For this I used an nodeMCU with a RGB led to request the spaceapi every 10 mins and display open (green) or closed (red) status. The nodeMCU is a developer board with an ESP8266 / ESP12-E chip. There are a few different types of nodemcu's, check out this article for more information about these


Parts List



Spacestatus schematic.png

I used male breadboard connectors to connect everything to the nodeMCU, you can solder the RGB led directly on the wire (with one resistor on the anode (+))

The clock I have has a 6v that is connected to the Vin and GND of the nodeMCU

  • Check the clock you want to use if there is enough space inside to put nodeMCU inside and where to place the LED.
  • Check if you can use the power of the clock and this is good for Vin. In my case i had 6 V, this in within the range of 4.5V ~ 9V. If you have a other version of nodeMCU check the documentation.
  • Download the source and change the settings for your hackerspace.
  • Upload code to nodeMCU via USB
  • Connect the RGB LED and power in the the nodeMCU

LED remarks

If you order a LED chip check what type you buy, you have commen anode and commen cathode types. These have to be connected different I used an common anode. I include setting you can change. I have no tested this part so there may more changes needed to make this work.

I also use one resistor since i only show one color all times. If you want to use more then one color at a time then you should use a resistor per color, so 3 for R,G,B.

You can cut a part of the LED as long you don't touch the parts where the electronics are. For me I 'decapped' the LED with a iron saw and sanding it down to have a flat surface.