Thanks for the fast reply,
You got me with the updates log, it seems that the wireless router had fallen into a bizarre state, after a power failure, in which although the T/H sensor light did not blink there was no data transfer, everything is up and running now after a router reboot.
Thanks again

Hi there, Domoticz stopped storing T/H data from a tasmotized Ewelink sensor after 2 years of seamless operation, on my raspberry i have around 21gb of free space so there is no space issue, last date of data storing is the 26th of April, as we speak everything is working fine, i can see my sensor ...