Temperature trace from inside lava cake and oven via custom Tasmota device

cross-posted from: https://lemmy.world/post/20112075

I have two type-k thermocouples with breakouts from Adafruit, attached to a ESP8266 (Huzzah I believe). My oven was very old and didn't come with a temperature readout or any kind of preheating status (but thankfully also no builtin WiFi). The Tasmota device reports to HomeAssistant, which stores data in InfluxDb, which I can then chart in Grafana.

Here you can see the internal temperature got to 151F, and I was surprised to see how much the oven's temperature rebounded after I took the cakes out, despite being off.

The recipe is "Chocolate Lava Cakes For Two" from NYT Cooking. It's one I make semi-regularly, pretty quick on a weeknight and delicious. I have small ramekins so the recipe makes three and they cook a little faster than the recipe's would.