tmr.alarm(0, 60000, 1, function()

	SDA_PIN = 6 -- sda pin, GPIO12
	SCL_PIN = 5 -- scl pin, GPIO14

	si7021 = require("si7021")
	si7021.init(SDA_PIN, SCL_PIN)
	si7021.read(OSS)
	h = si7021.getHumidity()
	t = si7021.getTemperature()

	-- pressure in differents units
	print("Humidity: "..(h / 100).."."..(h % 100).." %")

	-- temperature in degrees Celsius  and Farenheit
	print("Temperature: "..(t/100).."."..(t%100).." deg C")
	print("Temperature: "..(9 * t / 500 + 32).."."..(9 * t / 50 % 10).." deg F")

	-- release module
	si7021 = nil
	package.loaded["si7021"]=nil

end)