-- File: ds.lua --
-- Paste bellow code to file --

local function toFahrenheit(c)
    return c * 9 / 5 + 32
end

t = require("ds18b20")
-- GPIO0 is pin 3
pin = 3
lasttemp = 0
t.setup(pin)
temperature=t.read()
lasttemp = temperature
t1 = lasttemp / 10000
tempout=(string.format("%2d", toFahrenheit(t1))
print("Temperature: "..tempout.."'F")