From c64bc2496093dfd0f107e15473adff8437574cc9 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@koston.org>
Date: Tue, 31 Mar 2026 07:34:54 -1000
Subject: [PATCH] [preferences] Reduce log verbosity for unchanged NVS/FDB
 writes (#15332)

---
 esphome/components/esp32/preferences.cpp     | 12 ++++++++----
 esphome/components/libretiny/preferences.cpp | 13 +++++++++----
 2 files changed, 17 insertions(+), 8 deletions(-)

diff --git a/esphome/components/esp32/preferences.cpp b/esphome/components/esp32/preferences.cpp
index e88ace3e6b..bc0a34ebe8 100644
--- a/esphome/components/esp32/preferences.cpp
+++ b/esphome/components/esp32/preferences.cpp
@@ -129,11 +129,15 @@ bool ESP32Preferences::sync() {
   }
   s_pending_save.clear();
 
-  ESP_LOGD(TAG, "Writing %d items: %d cached, %d written, %d failed", cached + written + failed, cached, written,
-           failed);
   if (failed > 0) {
-    ESP_LOGE(TAG, "Writing %d items failed. Last error=%s for key=%" PRIu32, failed, esp_err_to_name(last_err),
-             last_key);
+    ESP_LOGE(TAG, "Writing %d items: %d cached, %d written, %d failed. Last error=%s for key=%" PRIu32,
+             cached + written + failed, cached, written, failed, esp_err_to_name(last_err), last_key);
+  } else if (written > 0) {
+    ESP_LOGD(TAG, "Writing %d items: %d cached, %d written, %d failed", cached + written + failed, cached, written,
+             failed);
+  } else {
+    ESP_LOGV(TAG, "Writing %d items: %d cached, %d written, %d failed", cached + written + failed, cached, written,
+             failed);
   }
 
   // note: commit on esp-idf currently is a no-op, nvs_set_blob always writes
diff --git a/esphome/components/libretiny/preferences.cpp b/esphome/components/libretiny/preferences.cpp
index 344ca4a8b3..fba6717294 100644
--- a/esphome/components/libretiny/preferences.cpp
+++ b/esphome/components/libretiny/preferences.cpp
@@ -108,16 +108,21 @@ bool LibreTinyPreferences::sync() {
       }
       written++;
     } else {
-      ESP_LOGD(TAG, "FDB data not changed; skipping %" PRIu32 "  len=%zu", save.key, save.data.size());
+      ESP_LOGV(TAG, "FDB data not changed; skipping %" PRIu32 "  len=%zu", save.key, save.data.size());
       cached++;
     }
   }
   s_pending_save.clear();
 
-  ESP_LOGD(TAG, "Writing %d items: %d cached, %d written, %d failed", cached + written + failed, cached, written,
-           failed);
   if (failed > 0) {
-    ESP_LOGE(TAG, "Writing %d items failed. Last error=%d for key=%" PRIu32, failed, last_err, last_key);
+    ESP_LOGE(TAG, "Writing %d items: %d cached, %d written, %d failed. Last error=%d for key=%" PRIu32,
+             cached + written + failed, cached, written, failed, last_err, last_key);
+  } else if (written > 0) {
+    ESP_LOGD(TAG, "Writing %d items: %d cached, %d written, %d failed", cached + written + failed, cached, written,
+             failed);
+  } else {
+    ESP_LOGV(TAG, "Writing %d items: %d cached, %d written, %d failed", cached + written + failed, cached, written,
+             failed);
   }
 
   return failed == 0;