From 8cff7a4f1c533721581aac82285e1c094124fc00 Mon Sep 17 00:00:00 2001
From: "Adrian A. Baumann" <ade@adebaumann.com>
Date: Mon, 29 Jun 2026 01:03:08 +0200
Subject: [PATCH] Explicitly set LittleFS for uploadfs; log filesystem contents
 on boot

---
 platformio.ini |  3 ++-
 src/main.cpp   | 10 +++++++++-
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/platformio.ini b/platformio.ini
index 82d3a0d..27cc672 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -25,7 +25,8 @@ board = esp32dev
 framework = arduino
 platform = espressif32
 monitor_speed = 115200
-lib_deps = 
+board_build.filesystem = littlefs
+lib_deps =
 	tzapu/WiFiManager @ ^2.0.17
 	bblanchon/ArduinoJson @ ^7.4.3
 	knolleary/PubSubClient @ ^2.8
diff --git a/src/main.cpp b/src/main.cpp
index 8756481..7b1a817 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -461,7 +461,15 @@ static void applyFactoryResetIfNeeded(int count) {
 void setup() {
   Serial.begin(115200);
   Serial.println("\n\n=== ESP32 Device boot ===");
-  LittleFS.begin(true);
+  if (!LittleFS.begin(false)) {
+    Serial.println("[FS] mount failed, formatting...");
+    LittleFS.begin(true);
+  } else {
+    Serial.println("[FS] mounted OK");
+    File root = LittleFS.open("/");
+    File f = root.openNextFile();
+    while (f) { Serial.printf("[FS]  %s (%u bytes)\n", f.name(), f.size()); f = root.openNextFile(); }
+  }
 
   loadConfig();
   hostnameParam.setValue(hostname, sizeof(hostname) - 1);