How to use the -tcp mode?

[leoheck]

First of all, the README.md shows

The command has the port missing, it should be like

sudo ./ws2812svr -tcp [PORT]

Also
How could I use the -tcp mode with the command line.

I am trying this:

# Launch the server
sudo ./ws2812svr -tcp 12346

# Send some commands
echo "setup 0,8,3; init; fill 1,FFFFFF; render" | nc  127.0.0.1 12346

It gives me

Client connected.
Invalid channel number, use channels <number> to initialize total channels you want to use.
Gpio 0 is illegal for LED channel 0
ws2811_init failed: Selected GPIO not possible
Invalid channel number, did you call setup and init?

And the server closes, which is not good because someone can send some wrong command to just close the server.

Trying to send the same command from the README, like

echo "setup channel_1_count=8;rainbow;brightness 1,100;" | nc -k 127.0.0.1 9999

[leoheck]

Actually I made it work with this command (the README.md lacks the init and the render commands.

echo "setup 1,8,3;init;rainbow;brightness 1,100;render;" | nc 127.0.0.1 9998

[leoheck]

Here, the example for a loop, that disconnects the client after sending the command.
It is working

read -r -d '' cmd <<-EOM
setup 1,8,3
init
rainbow
thread_start
do
	rotate 1,1,2
	render
	delay 200
loop
thread_stop
EOM

echo -e "$cmd" | nc -w 0 127.0.0.1 9998

[leoheck]

TCP version works better than using file or uname pipe. Thanks for referring me that.

[tom-2015]

you're right the documentation was not up to date. I've updated that now also added 2 new effects: chaser and color_change.

[leoheck]

This is still wrong
sudo ./ws2812svr -tcp

It should be like this unless you added a default port in the code.
sudo ./ws2812svr -tcp [PORT]

[tom-2015]

yes default port is 9999