Neopixel Notifier

Neopixel Notifier

I was looking for solutions to make a notifier to for various projects. I while back I made something similar with a small OLED screen but this time I wanted something more “wife friendly” so I set out. I had a few neopixel WS2812 RGB LEDs laying around and some NodeMCU ESPs. I went with a NodeMCU board for simplicity of micro USB power already onboard but you could use any ESP for this project and it should work.

So I started searching how to cobble them together and I found

Which led me to… which led me to here

This was perfect. I took the ESP8266 and connected it via MQTT to subscribe to a topic for changing the colors of a WS2812 (neopixel). All you do is send RBGW code (255000000000 is red for example) via the topic.

The code works great, after changing the topics and such. But its not up to my liking. So here is my re-coded version. I basically made it easily editable, add all the variables to the top.

Now I can slap an ESP and the neopixel in something for notification. I just have to remember what each color means and I will let Node-Red send the changes when needed. Fucking awesome. I can use this for temperature, rain, mail delivery, change the color if someone has ever pressed the doorbell that day…its endless. Only downfall is one alert overrides the previous color (is that really a downfall?) so the alert is “over-written”. So if you are going to use it for say timing on something or modes of the day or what have you, single project use, then it should fit the bill.

I happened to have to have a 3D printer and came across a really nice model of a lamp (Bioh Lamp) that I decided would work perfect as a notifier. After I made some modifications and added NodeMCU standoffs it worked perfectly. Don’t get me wrong it took a few tries to get the spacing right and I tried a few approaches before using the NodeMCU so the older standoff for centering the WS2812 is still there. Unfortunately the author has is locked up pretty tight and used the Creative Commons – Attribution – Non-Commercial – No Derivatives license so I cannot share it.

I used an old Apple iPod USB cable and chopped it up wired it to the boards. Also repurposed an old iPhone charger to use as the power supply. Perfect!


Code below.



The code!


This was sitting as a draft for a quite a while so I cannot remember if this is the exact code I used. If it doesn’t work let me know. My notifier works fine.

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