Build a dashboard readout + iOS alert that predicts when an outside temperature sensor will meet an inside one, using a least-squares trend of both over the last 2h.
Produces:
- Two rate sensors — °C/h slope of each temp (OLS regression over trailing 2h).
- Three template sensors — time-until-crossover (
2h31m), clock ETA (22:53), current difference (1.5 °C). - A dashboard card with those three lines.
- An iOS push when the two temps converge.