Hello all A very nice solution exists: Use this library: [url][/https://github.com/gpepe/esp8266-sendemail] And this program: [/ #include <WiFi.h> #include <sendemail.h> /* * to enable/disable debug on Serial: Please see sendemail.h * */ const char* SSID = "------"; const char* PASS = "----------"; ...

thank you for your reply Maybe I misunderstood the operation of the internal RTC, but I did not see a function that will generate an alarm to wakeup the ESP32 : RTC.setAlarm (ALM1_MATCH_HOURS, second (talarm), minute (talarm), hour (talarm), 0); 900MHz is very good for the penetration of buildings!!...

There are two important things missing:
Real deepsleep which restarts at the main loop without redoing an init, and a real time clock with an alarm wakeup identical to the functionality of the chip DS3231 .
If possible RF Lora 868/915 Mhz or new wifi 900 Mhz (802.11Ah).