Added crash detector

src/helper.cpp

@@ -47,6 +47,27 @@ void tcp_cleanup() {
   while (tcp_tw_pcbs) tcp_abort(tcp_tw_pcbs);
 }
 
+void checkResetReason() {
+#if defined(ESP8266)
+  rst_info* _rinfo;
+  _rinfo = ESP.getResetInfoPtr();
+
+  Log.notice(F("HELP: Last reset cause %d" CR), _rinfo->exccause);
+
+  if (_rinfo->exccause > 0) {
+    char s[120];
+    snprintf(&s[0], sizeof(s),
+             "HELP: Exception (%d) reason=%d epc1=0x%08x epc2=0x%08x "
+             "epc3=0x%08x execvaddr=0x%08x depc=0x%08x",
+             _rinfo->exccause, _rinfo->reason, _rinfo->epc1, _rinfo->epc2,
+             _rinfo->epc3, _rinfo->excvaddr, _rinfo->depc);
+    writeErrorLog(&s[0]);
+  }
+#else  // defined (ESP32)
+#warning "Todo: Handle reset reasons on ESP32"
+#endif
+}
+
 void writeErrorLog(const char* format, ...) {
   File f = LittleFS.open(ERR_FILENAME, "a");
 
@@ -57,20 +78,23 @@ void writeErrorLog(const char* format, ...) {
     f = LittleFS.open(ERR_FILENAME, "a");
   }
 
-  if (f) {
   va_list arg;
   va_start(arg, format);
-    char buf[80];
+  char buf[120];
   vsnprintf(&buf[0], sizeof(buf), format, arg);
+  va_end(arg);
+  Log.errorln(&buf[0]);
+
+  if (f) {
 #if defined(ESP8266)
     f.write(&buf[0], strlen(&buf[0]));
 #else  // ESP32
     f.write((unsigned char*)&buf[0], strlen(&buf[0]));
 #endif
-    Log.errorln(&buf[0]);
-    va_end(arg);
     f.println();
     f.close();
+  } else {
+    Log.warning(F("HELP: Failed to open error log." CR));
   }
 }
 

src/helper.hpp

@@ -38,6 +38,7 @@ void tcp_cleanup();
 
 // Error logging
 void writeErrorLog(const char* format, ...);
+void checkResetReason();
 
 // Sleep mode
 void deepSleep(int t);

src/main.cpp

@@ -133,12 +133,9 @@ void setup() {
 #if LOG_LEVEL == 6 && !defined(MAIN_DISABLE_LOGGING)
   // Add a delay so that serial is started.
   // delay(3000);
-#if defined(ESP8266)
-  Log.verbose(F("Main: Reset reason %s." CR), ESP.getResetInfo().c_str());
-#else  // defined (ESP32)
-#endif
 #endif
   // Main startup
+
 #if defined(ESP8266)
   Log.notice(F("Main: Started setup for %s." CR),
              String(ESP.getChipId(), HEX).c_str());
@@ -157,6 +154,7 @@ void setup() {
 
   LOG_PERF_START("main-config-load");
   myConfig.checkFileSystem();
+  checkResetReason();
   myConfig.loadFile();
   myWifi.init();
   myAdvancedConfig.loadFile();