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arduino-cli/libraries/Blynk/examples/Blynk.Inject/Template_ESP32/ConfigStore.h

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+/**************************************************************
+ * This is a DEMO. You can use it only for development and testing.
+ *
+ * If you would like to add these features to your product,
+ * please contact Blynk for Business:
+ *
+ *                  http://www.blynk.io/
+ *
+ **************************************************************/
+
+struct ConfigStore {
+  uint32_t  magic;
+  char      version[9];
+  uint8_t   flagConfig:1;
+  uint8_t   flagApFail:1;
+  uint8_t   flagSelfTest:1;
+
+  char      wifiSSID[34];
+  char      wifiPass[64];
+
+  char      cloudToken[34];
+  char      cloudHost[34];
+  uint16_t  cloudPort;
+
+  uint16_t  checksum;
+} __attribute__((packed));
+
+ConfigStore configStore;
+
+const ConfigStore configDefault = {
+  0x626C6E6B,
+  BOARD_FIRMWARE_VERSION,
+  0, 0, 0,
+  
+  "",
+  "",
+  
+  "invalid token",
+  "blynk-cloud.com", 80,
+  0
+};
+
+#include <Preferences.h>
+Preferences preferences;
+
+void config_load()
+{
+  memset(&configStore, 0, sizeof(configStore));
+  preferences.getBytes("config", &configStore, sizeof(configStore));
+  if (configStore.magic != configDefault.magic) {
+    DEBUG_PRINT("Using default config.");
+    configStore = configDefault;
+    return;
+  }
+}
+
+bool config_save()
+{
+  preferences.putBytes("config", &configStore, sizeof(configStore));
+  return true;
+}
+
+bool config_init()
+{
+  preferences.begin("blynk", false);
+  config_load();
+  return true;
+}
+
+void enterResetConfig()
+{
+  DEBUG_PRINT("Resetting configuration!");
+  configStore = configDefault;
+  config_save();
+  BlynkState::set(MODE_WAIT_CONFIG);
+}
+
+template<typename T, int size>
+void CopyString(const String& s, T(&arr)[size]) {
+  s.toCharArray(arr, size);
+}
+