When you get a CC1101 make sure you get a dedicated 433Mhz one for your purpose. I have both 433Mhz and 868Mhz CC1101s for my various sensors, and while they both can be set to the respectively other frequency, the reception and range for their dedicated frequency use is much better.
Just keeping them at the recommended food safety temperatures. 4º C for the lower shelf of the fridge and at or below -18º C for the freezer 
It’s actually one of the reasons why I got these thermometers and implemented the average temperatures over the last 4 hours in my set up.