The solution you want to use (factory + OTA) is implemented here: https://github.com/chegewara/esp32-ota-with-ble-setup Im currently on the OTA part in my project and want to use setup as @davdav (small factory+ single ota) so i read your project and especially the bootloader part. The current vers...

Thanks, Angus. I will use only the MAC as unique id.

Hello,
As esp_efuse_read_mac is deprecated but esp_efuse_mac_get_default returns 0 what to use to get the unique id for the chip?

EDIT: sorry, esp_efuse_mac_get_default doesn't return 0,my fault. What's the difference between this function and esptool's chip_id which has some additional chars?

If you don't really need the data to actually be sent every 2 minutes, you could wake up every 2 minutes and just log the data before going back to deep sleep. Then once per hour send it over WIFI. That would save you a lot of power. I know, but im using the data asap (not less than 1m) for presenc...

Unfortunately my project cannot sleep so long. Im measuring temp,humidity and air quality. Those sensors require some time to measure. Also, i need the values at least once per 2 minutes.
Somebody mentioned a back feeding the ldo. I've ordered a bare ESP32-WROOM module and gonna use better ldo.

Guys, seriously, does ESP32 on battery project(using wifi of course) even exist? I did alot of search and cant find anything usable.

Oh, i forgot to mention. Lifepo4 is connected directly to the 3v pin. Its 3.2v and doesn't need stabilizer.

So, i tested with 700mAh LiFePo4 battery - 23 hours. Sleeping only a minute and reinitializing the Wifi doesn't seem to fit a battery project Ive never used BLE but if its less power hungry i might try it.

Im really stuck with this sensor :( Im trying to not interrupt its working between the sleeps. I tried to: Put the sensor to sleep before esp deep sleep and wake it after. Initialize/reset it only the first time. etc, etc, but it seems that the sensor does not keep its calibration between the sleeps...

Hello, Here is my (almost) complete EPS32 project part of my home iot mesh with Openhab2: esp_project.jpg The box is 72x72cm. The sensor is BME280 and left of it is the header for a CCS811 where i currently plugged another external BME280 to compare the readings. And here is the problem :) Screensho...