Use V307 flash

examples/modbus-dashboard/net.h

@@ -16,7 +16,11 @@ extern "C" {
 #define HTTPS_URL "https://0.0.0.0:8443"
 #endif
 
-void web_init(struct mg_mgr *mgr);
+void web_init(struct mg_mgr *mgr);              // Initialise Web UI
+bool web_load_settings(void *buf, size_t len);  // Load from disk/flash
+bool web_save_settings(void *buf, size_t len);  // Save to disk/flash
+
+#define SETTINGS_MAGIC 0xaabbccdd
 
 #ifdef __cplusplus
 }