it's working. very appreciate it.

one interesting finding is, every time eps32 deep sleeps, the "gettimeofday" though continuous to give time, but it will miss around 50ms , make two device time not synced.

In the project, we plan to build a periodic timer to send a lora message, and sleep between the timer. For now our solution is record the time sending last message, start a timer after wakeup based on calculation of time difference. but there will couple us difference every time(4-10us), therefore ...

i believe it is partly related to the dma, try this https://github.com/espressif/esp-idf/tr ... _read/main

Thx , guess this is the most automatic way

it was a working program, but we recently need to add ble function to it, once we init ble, it crashed with prompt:
0x4008116c: call_start_cpu1 at G:/esp_vsc/esp-idf/components/esp32/cpu_start.c:269

I (495) cpu_start: App cpu up.
Guru Meditation Error: Core 0 panic'ed (LoadProhibited). Exception ...

try to make sure nvs is default after every flash.

It seems that your bluetooth disabled, you need to enable it in menu config, you should not directly add it in your cmake.

this solves the problem perfectly, thanks alot

it's solved, for record. this computer used to be set up in esp idf in msys environment , there are settings in
"preferences: open settings(json)"
still pointed top msys mingw32, which cause the problem. deleted these , and it is working now. thanks for help

Hi all
While i was writing a component about ble functions, i've met this error:
../components/ble/ble.h:9:20: fatal error: esp_bt.h: No such file or directory

although i've put bt in cmakelists for the custom component
set(COMPONENT_ADD_INCLUDEDIRS .)

set(COMPONENT_SRCS "ble.cpp")

set ...