local id = os.getComputerID()
local status = "idle"  -- or "busy", "charging", etc.

while true do
    local msg = {
        id = id,
        label = os.getComputerLabel() or ("Turtle_" .. id),
        status = status,
        time = os.clock()
    }
    rednet.broadcast(textutils.serialize(msg), "turtle_status")
    sleep(5)
end