These data loggers can be used to measure and store readings of humidity and temperature automatically. The device is with a large LCD which can display real-time readings and logging indication. These data loggers can send SMS alarm messages to the authorized user if the humidity and temperature exceed the limits of the setting. User can also dial the data logger through any mobile phone to get the readings of humidity and temperature. User can set up and download the recorded data through the software easily by connecting the device to PC via USB. Then user can view and analyze the data, or export files in different formats(txt, xls, csv, bmp, jpg).