Ask HN: Commercial WiFi thermometers with custom API endpoint?

Looking for battery-powered, WiFi-enabled thermometers that can be placed in a fridge or freezer that can send data to a custom endpoint (i.e. my server and not the cloud platform of the manufacturer). Also acceptable would be a device that sends to the manufacturer's cloud, so long as one can easily forward data to one's own endpoint.

The irony is that these aren't too hard to build with a raspberry pi, but I'd like a commercial hardware solution. All of the ones I can find seem oriented around using the manufacturer's cloud for monitoring etc. Looking for more of a white label solution.

Any thoughts are very much appreciated.