send/recv

-- Wireless Redstone by Islanderon
-- Version 1.0.2
-- WARNING: Requires the WR api to be named 'wr'.
local function openRednet()
local listOfSides = rs.getSides()
local listofPossibles = {}
local counter1 = 0
while true do
  counter1 = counter1 +1

  if peripheral.isPresent(tostring(listOfSides[counter1])) and peripheral.getType(listOfSides[counter1]) == "modem" then
   table.insert(listofPossibles,tostring(listOfSides[counter1]))
  end

  if counter1 == 6 and table.maxn(listofPossibles) == 0 then
   print("no wifi present")
   return nil
  end

  if counter1 == 6 and table.maxn(listofPossibles) ~= 0 then
   rednet.open(listofPossibles[1])
   return listofPossibles[1]
  end
end
end
function fromboolean(input)
if input == true then
return "true"
else
return "false"
end
end
function toboolean(input)
if input == "true" then
return true
else
return false
end
end
function find(str, match, startIndex)  --Finds @match in @str optionally after @startIndex
if not match then return nil end
str = tostring(str)
local _ = startIndex or 1
local _s = nil
local _e = nil
local _len = match:len()
while true do
local _t = str:sub( _ , _len + _ - 1)
if _t == match then
_s = _
_e = _ + _len - 1
break
end
_ = _ + 1
if _ > str:len() then break end
end
if _s == nil then return nil else return _s, _e end
end
function seperate(str, divider) -- Seperate function by tommas
if not divider then return nil end
str = tostring(str)
local start = {}
local endS = {}
local n=1
repeat
if n==1 then
start[n], endS[n] = find(str, divider)
else
start[n], endS[n] = find(str, divider, endS[n-1]+1)
                                end
n=n+1
until start[n-1]==nil
local subs = {}
for n=1, #start+1 do
if n==1 then
subs[n] = str:sub(1, start[n]-1)
elseif n==#start+1 then
subs[n] = str:sub(endS[n-1]+1)
else
subs[n] = str:sub(endS[n-1]+1, start[n]-1)
                                end
end
return subs
end
openRednet()
valid = 0
function runprogram()
term.clear()
term.setCursorPos(1,1)
if valid == 1 then
print "Invalid Choice"
end
print "Pick One:"
print "[1] Sender"
print "[2] Receiver"
print ""
event, choice = os.pullEvent()
if event == "key" and choice == 2 then -- Sending
write "Frequency: "
freq = io.read()
term.clear()
term.setCursorPos(1,1)
print ("Now sending redstone input to frequency "..freq..", hold CTRL-T to end.")
while true do
  os.pullEvent("redstone")
  states = {redstone.getInput("left"), redstone.getInput("right"), redstone.getInput("back"), redstone.getInput("front"), redstone.getInput("top"), redstone.getInput("bottom")}
  wr.sendState(freq, "left", states[1])
  wr.sendState(freq, "right", states[2])
  wr.sendState(freq, "back", states[3])
  wr.sendState(freq, "front", states[4])
  wr.sendState(freq, "top", states[5])
  wr.sendState(freq, "bottom", states[6])
   print ("SENT: Redstone change")
end
elseif event == "key" and choice == 3 then -- Receiving
write "Frequency: "
freq = io.read()
term.clear()
term.setCursorPos(1,1)
print ("Now receiving data on frequency "..freq..", hold CTRL-T to end.")
while true do
  rec = wr.recState(freq, true)
  rec[2] = fromboolean(rec[2])
  print (rec[1].." : "..rec[2])
end
else
valid = 1
runprogram()
end
end
runprogram()