Ok then. What I would suggest to begin is an Arduino Pro Mini, the 3.3V 8MHz version. You will need a usb-serial adaptor to upload sketches to the Pro Mini. This adapter won't be part of the final circuit and can be re-used on other projects. Also a large breadboard, a 16x02 LCD and a few other small components such as resistors and a small trimmer pot for the LCD contrast adjustment. Your first goal should be to read the temp sensor and display it on the LCD. The next step after that would be to use a second Pro Micro (or other Arduino you may have) and a basic pair of 433MHz transmitter and receiver modules to extent the project to wireless.
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