This is BY FAR the easiest way to start playing with websockets TODAY.
websocketd is created by Joe Walnes: https://github.com/joewalnes/websocketd/
For example, you can pipe the incoming Arduino serial data into a logfile:
nice -20 cat /dev/ttyACM0 > current.csv &
then use websocketd to serve the data that comes from tailing this logfile:
websocketd --port=8080 tail -f -n 1000 current.csv
The serving script can be pretty much anything that writes to STDOUT and reads from STDIN, in any language of your choice. With a little Python non-blocking reading, I bet you could even implement a simple chat server!
You'll need to learn some asynchronous programming in Python, but this is a good starting
point for more complex servers. The Python websocket module with async support: https://github.com/aaugustin/websockets
Only perform a subset of the desired message-passing operations (serial-to-websocket, websocket-to-serial).
WORKS - v3.py reads incoming data over the serial port and appends it to a list. Once per second, the most recent value in the list is written to the websocket.
WORKS - v4.py also has data lookback when the websocket is created.
WORKS - v5.py adds additional input checking and has support for multiple data inputs.
WORKS - v4a.py has some minor refactoring and tweaks for working with 555.html
THIS was the point where everything was version controlled in its own repository!
- implement security on write operations
- write incoming data to logfile
- handle incoming data in a separate thread/process