Use V307 flash

examples/modbus-dashboard/main.c

@@ -4,12 +4,34 @@
 #include "mongoose.h"
 #include "net.h"
 
+#define CONFIG_FILE "settings.bin"
+
 static int s_sig_num;
 static void signal_handler(int sig_num) {
   signal(sig_num, signal_handler);
   s_sig_num = sig_num;
 }
 
+bool web_load_settings(void *buf, size_t len) {
+  bool ok = false;
+  size_t size = 0;
+  void *data = mg_file_read(&mg_fs_posix, CONFIG_FILE, &size);
+  if (data == NULL) {
+    MG_ERROR(("Error reading %s", CONFIG_FILE));
+  } else if (size != len) {
+    MG_ERROR(("%s size != %lu", CONFIG_FILE, len));
+  } else {
+    memcpy(buf, data, len);
+  }
+  free(data);
+  return ok;
+}
+
+bool web_save_settings(void *buf, size_t len) {
+  MG_INFO(("Saving to %s", CONFIG_FILE));
+  return mg_file_write(&mg_fs_posix, CONFIG_FILE, buf, len);
+}
+
 int main(void) {
   struct mg_mgr mgr;