Well, I am still a newbie with Arduino and I don't have enough free time to learn the programming properly.
I found some sample codes with u8glib library for some sensors.
They were originally for I2C OLED SSD1306 displays. But, don't like these tiny OLED displays. Sorry!
I know, that the u8glib library can be interfaced with Nokia 5110 displays very easily, so I modified some sample codes to work with it.
I did it with DHT11, BMP180, and DS18B20. If I have time, I will publish it.