Reset Reason
About
Note
This is a work in progress project and this section is still missing. If you want to contribute, please see the Contributions Guide.
Example
To get started with Reset Reason, you can try:
Reset Reason
/*
* Print last reset reason of ESP32
* =================================
*
* Use either of the methods print_reset_reason
* or verbose_print_reset_reason to display the
* cause for the last reset of this device.
*
* Public Domain License.
*
* Author:
* Evandro Luis Copercini - 2017
*/
#if CONFIG_IDF_TARGET_ESP32 // ESP32/PICO-D4
#include "esp32/rom/rtc.h"
#elif CONFIG_IDF_TARGET_ESP32S2
#include "esp32s2/rom/rtc.h"
#elif CONFIG_IDF_TARGET_ESP32C2
#include "esp32c2/rom/rtc.h"
#elif CONFIG_IDF_TARGET_ESP32C3
#include "esp32c3/rom/rtc.h"
#elif CONFIG_IDF_TARGET_ESP32S3
#include "esp32s3/rom/rtc.h"
#elif CONFIG_IDF_TARGET_ESP32C6
#include "esp32c6/rom/rtc.h"
#elif CONFIG_IDF_TARGET_ESP32H2
#include "esp32h2/rom/rtc.h"
#else
#error Target CONFIG_IDF_TARGET is not supported
#endif
#define uS_TO_S_FACTOR 1000000 /* Conversion factor for micro seconds to seconds */
void print_reset_reason(int reason) {
switch (reason) {
case 1: Serial.println("POWERON_RESET"); break; /**<1, Vbat power on reset*/
case 3: Serial.println("SW_RESET"); break; /**<3, Software reset digital core*/
case 4: Serial.println("OWDT_RESET"); break; /**<4, Legacy watch dog reset digital core*/
case 5: Serial.println("DEEPSLEEP_RESET"); break; /**<5, Deep Sleep reset digital core*/
case 6: Serial.println("SDIO_RESET"); break; /**<6, Reset by SLC module, reset digital core*/
case 7: Serial.println("TG0WDT_SYS_RESET"); break; /**<7, Timer Group0 Watch dog reset digital core*/
case 8: Serial.println("TG1WDT_SYS_RESET"); break; /**<8, Timer Group1 Watch dog reset digital core*/
case 9: Serial.println("RTCWDT_SYS_RESET"); break; /**<9, RTC Watch dog Reset digital core*/
case 10: Serial.println("INTRUSION_RESET"); break; /**<10, Instrusion tested to reset CPU*/
case 11: Serial.println("TGWDT_CPU_RESET"); break; /**<11, Time Group reset CPU*/
case 12: Serial.println("SW_CPU_RESET"); break; /**<12, Software reset CPU*/
case 13: Serial.println("RTCWDT_CPU_RESET"); break; /**<13, RTC Watch dog Reset CPU*/
case 14: Serial.println("EXT_CPU_RESET"); break; /**<14, for APP CPU, reset by PRO CPU*/
case 15: Serial.println("RTCWDT_BROWN_OUT_RESET"); break; /**<15, Reset when the vdd voltage is not stable*/
case 16: Serial.println("RTCWDT_RTC_RESET"); break; /**<16, RTC Watch dog reset digital core and rtc module*/
default: Serial.println("NO_MEAN");
}
}
void verbose_print_reset_reason(int reason) {
switch (reason) {
case 1: Serial.println("Vbat power on reset"); break;
case 3: Serial.println("Software reset digital core"); break;
case 4: Serial.println("Legacy watch dog reset digital core"); break;
case 5: Serial.println("Deep Sleep reset digital core"); break;
case 6: Serial.println("Reset by SLC module, reset digital core"); break;
case 7: Serial.println("Timer Group0 Watch dog reset digital core"); break;
case 8: Serial.println("Timer Group1 Watch dog reset digital core"); break;
case 9: Serial.println("RTC Watch dog Reset digital core"); break;
case 10: Serial.println("Instrusion tested to reset CPU"); break;
case 11: Serial.println("Time Group reset CPU"); break;
case 12: Serial.println("Software reset CPU"); break;
case 13: Serial.println("RTC Watch dog Reset CPU"); break;
case 14: Serial.println("for APP CPU, reset by PRO CPU"); break;
case 15: Serial.println("Reset when the vdd voltage is not stable"); break;
case 16: Serial.println("RTC Watch dog reset digital core and rtc module"); break;
default: Serial.println("NO_MEAN");
}
}
void setup() {
// put your setup code here, to run once:
Serial.begin(115200);
delay(2000);
Serial.println("CPU0 reset reason:");
print_reset_reason(rtc_get_reset_reason(0));
verbose_print_reset_reason(rtc_get_reset_reason(0));
Serial.println("CPU1 reset reason:");
print_reset_reason(rtc_get_reset_reason(1));
verbose_print_reset_reason(rtc_get_reset_reason(1));
#ifndef CONFIG_IDF_TARGET_ESP32H2
// Set ESP32 to go to deep sleep to see a variation
// in the reset reason. Device will sleep for 5 seconds.
#if CONFIG_IDF_TARGET_ESP32C3 || CONFIG_IDF_TARGET_ESP32H2
esp_sleep_pd_config(ESP_PD_DOMAIN_RC_FAST, ESP_PD_OPTION_OFF);
#else
esp_sleep_pd_config(ESP_PD_DOMAIN_RTC_PERIPH, ESP_PD_OPTION_OFF);
#endif
Serial.println("Going to sleep");
esp_deep_sleep(5 * uS_TO_S_FACTOR);
#endif
}
void loop() {
// put your main code here, to run repeatedly:
}
/*
Example Serial Log:
====================
rst:0x10 (RTCWDT_RTC_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0x00
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0008,len:8
load:0x3fff0010,len:160
load:0x40078000,len:10632
load:0x40080000,len:252
entry 0x40080034
CPU0 reset reason:
RTCWDT_RTC_RESET
RTC Watch dog reset digital core and rtc module
CPU1 reset reason:
EXT_CPU_RESET
for APP CPU, reset by PRO CPU
Going to sleep
ets Jun 8 2016 00:22:57
rst:0x5 (DEEPSLEEP_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0x00
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0008,len:8
load:0x3fff0010,len:160
load:0x40078000,len:10632
load:0x40080000,len:252
entry 0x40080034
CPU0 reset reason:
DEEPSLEEP_RESET
Deep Sleep reset digital core
CPU1 reset reason:
EXT_CPU_RESET
for APP CPU, reset by PRO CPU
Going to sleep
ets Jun 8 2016 00:22:57
rst:0x5 (DEEPSLEEP_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0x00
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0008,len:8
load:0x3fff0010,len:160
load:0x40078000,len:10632
load:0x40080000,len:252
entry 0x40080034
CPU0 reset reason:
DEEPSLEEP_RESET
Deep Sleep reset digital core
CPU1 reset reason:
EXT_CPU_RESET
for APP CPU, reset by PRO CPU
Going to sleep
*/