tankHalfFilled

-- if low energy buffer, output a redstone signal


-- settings
local outputSide = "left"   -- output restone signal to this side
local tankSide = "front"    -- the tank must be on this side of the computer

local maxEn = 14000

local buffer = maxEn/2
local defaultRsState = true

-- setup
local gen = peripheral.wrap(tankSide)

while true do
    sleep(1)

    local energy = 0
    local tankDetected = pcall(
        function()
            energy = gen.tanks()[1].amount
        end
    )
        local enStr = tostring(energy).." / "..maxEn


    if not tankDetected then
        print(enStr..": no tank fluid detected (This can mean there is an empty tank, or no tank there)")
    else
                term.clear()
                term.setCursorPos(1,1)


                if energy > buffer then
                        -- buffer is full enough
                        print(enStr..": over threshold")

                        rs.setOutput(outputSide,defaultRsState)
                else
                        --buffer is low
                        print(enStr..": under threshold")
                        rs.setOutput(outputSide, not defaultRsState)

                end

    end
end