PB2 Key Input Node

-- pastebin run 7y3scDEK

local program = [[
local modem = peripheral.find("modem")
local side = "right"
modem.open(8)
term.clear()
term.setCursorPos(1,1)
if type(key) == "number" then
    print(keys.getName(key))
else
    print("\""..key.."\"")
end
local mon = peripheral.find("monitor")
local mx,my
if mon then
    mon.setTextScale(2)
    mx,my = mon.getSize()
end
local drawMon = function(invertColors)
    if mon then
        if type(key) == "number" then
            mon.setCursorPos(math.max(1,math.ceil(mx/2)-math.floor(#keys.getName(key)/2)), math.ceil(my/2))
        else
            mon.setCursorPos(math.max(1,math.ceil(mx/2)-math.floor(#key/2)), math.ceil(my/2))
        end
        mon.setTextColor(invertColors and colors.black or colors.white)
        mon.setBackgroundColor(invertColors and colors.white or colors.black)
        mon.clear()
        mon.write((type(key) == "number" and keys.getName(key):upper() or key:upper()))
    end
end
local pushed = false
drawMon(false)
while true do
    local evt = {os.pullEvent()}
    if evt[1] == "monitor_touch" then
        modem.transmit(8,8,{
            ["key"] = key,
            ["status"] = true
        })
        drawMon(true)
        modem.transmit(8,8,{
            ["key"] = key,
            ["status"] = false
        })
        sleep(0.1)
        drawMon(false)
    elseif evt[1] == "redstone" then
        if (rs.getInput(side)) ~= pushed then
            pushed = not pushed
            modem.transmit(8,8,{
                ["key"] = key,
                ["status"] = pushed
            })
            if pushed then
                drawMon(true)
                if key == "turnon" then
                    local comps = {peripheral.find("computer")}
                    for a = 1, #comps do
                        comps[a].turnOn()
                    end
                end
            else
                drawMon(false)
            end
        end
    elseif evt[1] == "modem_message" then
        local message = evt[5]
        if message == "update" then
            if tonumber(key) then
                shell.run("pastebin run 7y3scDEK "..keys.getName(key))
            else
                shell.run("pastebin run 7y3scDEK "..key)
            end
        end
    end
end
]]

local tArg = {...}
if not tArg[1] then
    error("specify key")
end

local file = fs.open("startup","w")
if not tonumber(keys[tArg[1]]) then
    file.writeLine("key = \""..tArg[1].."\"")
else
    file.writeLine("key = keys[\""..tArg[1].."\"]")
end
file.write(program)
file.close()
os.reboot()