Simple controller for one or more status LEDs, controlled via USB CDC. This implementation is for Adafruit NeoPixels.
If needed, change the PIXELS_PIN define to set the datapin for the NeoPixels, and PIXELS_NUM to change the number of NeoPixels.
Upload the sketch to the Arduino.
Connect to the Arduino at 115200 baud, with eight databits, no parity and one stopbit.
Change the state of a NeoPixel by sending its index and the first letter of the state to set. The NeoPixels are zero-indexed, so with 5 pixels the first NeoPixel is 0 and the last is 4. The available states are:
- none: off
- working: pulsing white
- success: green
- fault: yellow
- error: red
Multiple states can be sent in one string, for example 0w1s2f3n.
Note that Arduinos, by design, get reset every time you connect to its serial port, which will clear the current state of the NeoPixels.