TunnelClient

-- Awake
print("Mining client awake: Hello World!")

-- Setup wireless
local modem = peripheral.wrap("right")
-- 5 Server -> Client
-- 6 Client -> Server
modem.open(111)
modem.open(112)
print("Channel 111 and 112 are open")

-- Setup receiving wireless messages
function WaitForMessage(messageCompare)
    while true do
        local a,b,c,d,e,f = os.pullEvent("modem_message")
        print("Message received: ")
        print(e)
        if(e == messageCompare) then
            print("Message accepted")
            break
        end
    end
end

-- Setup sending wireless messages
function SendMessage(message)
    modem.transmit(112, 111, message)
end

-- Down shortdown
function Down()
    while not turtle.down() do
        if turtle.detectDown() then turtle.digDown() end
        turtle.attackDown()
    end
    turtle.dig()
end

-- Up shorthand
function Up()
    while not turtle.up() do
        if turtle.detectUp() then turtle.digUp() end
        turtle.attackUp()
    end
    turtle.dig()
end

-- Forward shorthand
function Forward()
    while not turtle.forward() do
        if turtle.detect() then turtle.dig() end
        turtle.attack()
    end
end

-- Bedrock shorthand
function IsBedrock()
    local success, data = turtle.inspectDown()
    if success then
        return data.name == "minecraft:bedrock"
    else
        return false
    end
end

-- Server handshake
print("Waiting for server awake")
WaitForMessage("_ServerAwake")
print("Replying to server...")
SendMessage("_TurtleRegistered")

-- Reset position
print("Waiting for signal to reset Y")
WaitForMessage("_ResetY")
print("Picking up chest in case it's not in me")
turtle.select(1)
turtle.dig()

print("Letting server know ready...")
SendMessage("_TurtleReadyToMine")

print("Waiting to begin")
WaitForMessage("_Begin")

-- Mine Routine
function Mine()
    Forward()
end

function Drop()
    if turtle.getItemCount(16) > 0 then
        turtle.select(1)
        while not turtle.place() do
            turtle.dig()
            turtle.attack()
        end
        for i = 16,1,-1 do
            turtle.select(i)
            turtle.drop()
        end
        turtle.dig()
    end
end

-- Mine loop
while true do
    print("Waiting to start next cycle")
    WaitForMessage("_StartNextCycle")
    print("Starting next cycle (mine)...")
    Mine()
    print("Letting server know ready for next cycle...")
    SendMessage("_ReadyForNextCycle")

    print(">>")
    print(">>")
    print(">>")

    print("Waiting to start next cycle")
    WaitForMessage("_StartNextCycle")
    print("Starting next cycle (drop)...")
    Drop()
    print("Letting server know ready for next cycle...")
    SendMessage("_ReadyForNextCycle")

    print(">>")
    print(">>")
    print(">>")
end

print("Goodbye >>")
read()