Correct opens to use "w" filemode instead of "w+" filemode.

examples/companion_radio/main.cpp

@@ -291,7 +291,7 @@ class MyMesh : public BaseChatMesh {
     File file = _fs->open("/contacts3", FILE_O_WRITE);
     if (file) { file.seek(0); file.truncate(); }
 #elif defined(RP2040_PLATFORM)
-    File file = _fs->open("/contacts3", "w+");
+    File file = _fs->open("/contacts3", "w");
 #else
     File file = _fs->open("/contacts3", "w", true);
 #endif
@@ -356,7 +356,7 @@ class MyMesh : public BaseChatMesh {
     File file = _fs->open("/channels2", FILE_O_WRITE);
     if (file) { file.seek(0); file.truncate(); }
   #elif defined(RP2040_PLATFORM)
-    File file = _fs->open("/channels2", "w+");
+    File file = _fs->open("/channels2", "w");
   #else
     File file = _fs->open("/channels2", "w", true);
   #endif
@@ -413,7 +413,7 @@ class MyMesh : public BaseChatMesh {
     File f = _fs->open(path, FILE_O_WRITE);
     if (f) { f.seek(0); f.truncate(); }
   #elif defined(RP2040_PLATFORM)
-    File f = _fs->open(path, "w+");
+    File f = _fs->open(path, "w");
   #else
     File f = _fs->open(path, "w", true);
   #endif
@@ -875,7 +875,7 @@ public:
     File file = _fs->open("/new_prefs", FILE_O_WRITE);
     if (file) { file.seek(0); file.truncate(); }
 #elif defined(RP2040_PLATFORM)
-    File file = _fs->open("/new_prefs", "w+");
+    File file = _fs->open("/new_prefs", "w");
 #else
     File file = _fs->open("/new_prefs", "w", true);
 #endif

examples/simple_secure_chat/main.cpp

@@ -130,7 +130,7 @@ class MyMesh : public BaseChatMesh, ContactVisitor {
     File file = _fs->open("/contacts", FILE_O_WRITE);
     if (file) { file.seek(0); file.truncate(); }
 #elif defined(RP2040_PLATFORM)
-    File file = _fs->open("/contacts", "w+");
+    File file = _fs->open("/contacts", "w");
 #else
     File file = _fs->open("/contacts", "w", true);
 #endif
@@ -337,7 +337,7 @@ public:
     File file = _fs->open("/node_prefs", FILE_O_WRITE);
     if (file) { file.seek(0); file.truncate(); }
 #elif defined(RP2040_PLATFORM)
-    File file = _fs->open("/node_prefs", "w+");
+    File file = _fs->open("/node_prefs", "w");
 #else
     File file = _fs->open("/node_prefs", "w", true);
 #endif

src/helpers/IdentityStore.cpp

@@ -50,7 +50,7 @@ bool IdentityStore::save(const char *name, const mesh::LocalIdentity& id) {
   File file = _fs->open(filename, FILE_O_WRITE);
   if (file) { file.seek(0); file.truncate(); }
 #elif defined(RP2040_PLATFORM)
-  File file = _fs->open(filename, "w+");
+  File file = _fs->open(filename, "w");
 #else
   File file = _fs->open(filename, "w", true);
 #endif
@@ -72,7 +72,7 @@ bool IdentityStore::save(const char *name, const mesh::LocalIdentity& id, const
   File file = _fs->open(filename, FILE_O_WRITE);
   if (file) { file.seek(0); file.truncate(); }
 #elif defined(RP2040_PLATFORM)
-  File file = _fs->open(filename, "w+");
+  File file = _fs->open(filename, "w");
 #else
   File file = _fs->open(filename, "w", true);
 #endif