[Openccsensors]How To Send Info Over Rednet?

Hello everyone,

I have started using openCCsensors and what i want to do is use the information i get from machines to display on a monitor.
For example the stored energy in various storage devices or heat in a couple of reactors.

When i use the sensorview program I can see the information but I have no clue how to send it to my control room.
Is there a wiki or tutorial i am missing?

This is my setup:
- advanced computer with monitors in a "control room"
- computers with sensors to read my nuclear reactors
- all the computer are hooked up with wireless modems

What i want to do:
send the energy output and heat readings to the control room.


any help would be greatly appreciated :)/>

You can use JSON or a text format, though json would be the best.

Use either http://dkolf.de/src/...on-lua.fsl/home or the computercraft one, http://www.computerc...-computercraft/

Use a timer/sleep to get data every x seconds, then send it with something like this:

rednet.send(<computer id>, json.encode(sensorData))

Then on the computer you want to receive it, something like this would be used:

-- Load the file which could have been saved under 'dkjson'
os.loadAPI('dkjson')

-- Open rednet on the side, for this example it'll be right
rednet.open('right')

while true do
  local event, id, text = os.pullEvent()
  if event == "rednet_message" then
	local sensorData = json.decode(text);
-- Display it somehow
  end
end

In the end you could modify 'sensorview' to use the data received over rednet, but this should be a good start for you :)/>

Edit: I might have misled you with dkjson, last I saw it worked, but I guess not!

Use this instead - https://raw.github.com/luaforge/json/master/trunk/json/json.lua

or you can use the lua native format and don't have to use extra apis. just take textutils.serialize and textutils.deserialize.

Or just send your table, no serialization needed.

Lyqyd, on 29 August 2013 - 10:50 AM said:

Or just send your table, no serialization needed.

You can do that? I thought you can only send strings.
Well I've learnt something new today. :D/>

Lyqyd, on 29 August 2013 - 10:50 AM said:

Or just send your table, no serialization needed.

Cool! When was that added? Can I send any type, even a function or userdata or a table with functions in it?

Not sure what you mean by userdata. I don't know about functions, but if they work, they should still work if they're inside a table.

Unfortunately you can't send functions or metatables over rednet. If you put the functions in a table then that index disappears, leaving the rest of the table unaffected.