Server for send signals to arduino pixel_meter.

Usage

• Start server, it will default listen at *:8080
• Send POST request to /status like this:

http -f POST http://localhost:8080/status value=50 message='first string\\second string' blink=2

• Or configure your Kapacitor to /kapacitor like this:

data
    |alert()
        .post('http://localhost:8080/kapacitor')

Configure server

Command-line parameters

pixel-server \
--web-host="" \
--web-port=8080 \
--serial-port=COM3 \
--serial-speed=9600

Environment variables

PIXEL_SERVER_SERIAL_PORT=COM3 \
PIXEL_SERVER_SERIAL_SPEED=9600 \
PIXEL_SERVER_WEB_HOST= \
PIXEL_SERVER_WEB_PORT=8080 \
pixel-server

Command-line parameters has priority over environment variables.

Request parameters for /status

• value - value of signal, required,
  0 to 100 (red to green),
  -1 for off led
• message - message for 16x2 display, lines should be splitted with \ symbol, default no message
• blink - blink state, default 0,
  0 for not blinking,
  1 for blink 3 times and back to previous state,
  2 for persistent blinking
• brightness - led brightness, 0 to 100, default 100

Behaviour

If status changes from red to green, will be used smooth color change. If status changes from green to red, color will changed with blinking with last color.