Yet another traffic lights - CI status indicator.

 Nowadays Continuous Integration is popular and almost a “must-have” on a serious project. The only question is - what is your current CI status? How to make it visible? E-mails are good, but let’s be honest, nobody reads all those tons of “build failed/back to normal” messages. There is a need for some funny and unobtrusive way to let anybody know what’s the status in a, say, second. So, we’ve got “Traffic Lights CI status indicator”:

- visible;

- funny;

- it has DIY appearance(look at that fastening adhesive tape all over it!);

- a bit environmental - an old colour music box was reused;

- portable (about 1 kg, it’s really light);

- inexpensive (~25 pounds).

The workflow is simple: homemade client application checks CI status and sends “turn on red and turn off green” like messages to the microcontroller, the microcontroller turns on/off corresponding bulbs. As for the colours: “green” means everything is good, “blue(yellow)” means we’ve got some test(s) failed and “red” means that it’s time to hurry up since something is completely broken. That’s all.

FAQ.

1. What is actually being monitored?
 In the client application you specify what jobs to look at. The indicator shows the worse status of them;

2. What’s inside?
 Arduino Nano + relay box + LED bulbs.

3. Why your “yellow” is “blue”?
  That is simple, an old colour music box(Elektronika TsM-61) was reused. That device used “red-blue-green” colours for sound-to-light conversion.