Offline temperature logger with auto transfer, if wifi available

[KluthR (Robin Kluth)]

Hey

I want to monitor teperature when underway. With no wifi, but the device (ESP? with esphome? Tasmota? anything else?) should log the temperature locally. When home again and wifi connects, it should upload the history to HomeAssistant and go live until wifi disconnects again and start local storage of history.

Is there any solution for this?

Thanks in advance!

EDIT: Maybe this is what I search:

Use SD card to log sensor data in the case of wifi loss

Hi everyone. Im trying to log a simple ADC reading into a SD card, as a backup in case the Wi-Fi signal is lost. Is there a way to achieve this with ESPHome? Thanks in advance.

[Rudd-O]

There is no official mechanism for integrations to upload historical data. You can take a look at how OPOWER hacks around this tho.