@tatar-andrei could ou please share how you managed to get down to 1.5 uA? Is the ESP32 still in deepsleep in this state and can be woken up via RTC/timer or is the unit completley turned off and needs some user-interaction in order to wake up?
(I have no M5paper yet and want to find out if it is suitable for my project).
I am highly interested in how much amperage is drawn in deepsleep with the RTC configured to wake the ESP32 up in regular intervals. Could you please test this? Thanks man!