After just about losing a whole fridge worth of stock, I've decided I need to monitor the three fridges and one freezer we have at the cafe.
I don't need anything too fancy, as long as it has an output that I can consume, I can write a program to alert me when they fall outside the norms. Monitoring hardware needs to be WiFi.
Was thinking about these, however, am happy to take suggestions on anything else that people have used.