Saving History

[itgenmar]

Each time when the esp32 powers off the history is lost. Is there a way to implement saving the data?

[itgenmar]

[mrpeter322]

You need to save data into persistant memory as basic saving into variable (etc.) is power dependent. Please see docs for your main module and what options you have. If none just buy the external microsd slot with some microsd card or any other memory module which will be used for storing data. But focus on frequently accessing this data as measuirng writing and reading this data will be very frequent job. So maybe basic sd card option will be no go for long run. Please make some research.