From 4d5f5887487cc7e711ca8b9802d59aeff2475cc0 Mon Sep 17 00:00:00 2001
From: MichaelDvP <github@mdvp.de>
Date: Mon, 18 Oct 2021 11:25:41 +0200
Subject: [PATCH] reset reason to system info

---
 src/system.cpp | 38 ++++++++++++++++++++++++++++++++++++++
 src/system.h   |  2 ++
 2 files changed, 40 insertions(+)

diff --git a/src/system.cpp b/src/system.cpp
index 0eefdef50..a0ea88328 100644
--- a/src/system.cpp
+++ b/src/system.cpp
@@ -23,6 +23,20 @@
 #include "test/test.h"
 #endif
 
+#ifdef ESP_IDF_VERSION_MAJOR // IDF 4+
+#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_ESP32C3
+#include "../esp32c3/rom/rtc.h"
+#else
+#error Target CONFIG_IDF_TARGET is not supported
+#endif
+#else // ESP32 Before IDF 4.0
+#include "../rom/rtc.h"
+#endif
+
 namespace emsesp {
 
 uuid::log::Logger System::logger_{F_(system), uuid::log::Facility::KERN};
@@ -937,6 +951,7 @@ bool System::command_info(const char * value, const int8_t id, JsonObject & json
 #ifndef EMSESP_STANDALONE
     node["freemem"] = ESP.getFreeHeap() / 1000L; // kilobytes
 #endif
+    node["reset_reason"] = EMSESP::system_.reset_reason(0) + " / " +  EMSESP::system_.reset_reason(1);
 
     node = json.createNestedObject("Status");
 
@@ -1041,4 +1056,27 @@ bool System::command_restart(const char * value, const int8_t id) {
     return true;
 }
 
+const std::string System::reset_reason(uint8_t cpu) {
+    switch (rtc_get_reset_reason(cpu)) {
+    case 1:  return ("Power on reset");
+    // case 2 :reset pin not on esp32
+    case 3:  return ("Software reset");
+    case 4:  return ("Legacy watch dog reset");
+    case 5:  return ("Deep sleep reset");
+    case 6:  return ("Reset by SDIO");
+    case 7:  return ("Timer group0 watch dog reset");
+    case 8:  return ("Timer group1 watch dog reset");
+    case 9:  return ("RTC watch dog reset");
+    case 10: return ("Intrusion reset CPU");
+    case 11: return ("Timer group reset CPU");
+    case 12: return ("Software reset CPU");
+    case 13: return ("RTC watch dog reset: CPU");
+    case 14: return ("APP CPU reseted by PRO CPU");
+    case 15: return ("Brownout reset");
+    case 16: return ("RTC watch dog reset: CPU+RTC");
+    default: break;
+    }
+    return ("Unkonwn");
+}
+
 } // namespace emsesp
diff --git a/src/system.h b/src/system.h
index 16bd35aa2..2dfac2144 100644
--- a/src/system.h
+++ b/src/system.h
@@ -63,6 +63,8 @@ class System {
     static bool command_settings(const char * value, const int8_t id, JsonObject & json);
     static bool command_commands(const char * value, const int8_t id, JsonObject & json);
 
+    const std::string reset_reason(uint8_t cpu);
+
     void system_restart();
     void format(uuid::console::Shell & shell);
     void upload_status(bool in_progress);