From 313556bb49c6d24a5d584b4c080584c288c4cd46 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@home-assistant.io>
Date: Thu, 4 Sep 2025 08:52:06 -0500
Subject: [PATCH] [esp8266][logger] Store LOG_LEVELS strings in PROGMEM to
 reduce RAM usage

---
 esphome/components/logger/logger.cpp | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/esphome/components/logger/logger.cpp b/esphome/components/logger/logger.cpp
index 195e04948d..9a9393bd7c 100644
--- a/esphome/components/logger/logger.cpp
+++ b/esphome/components/logger/logger.cpp
@@ -246,14 +246,16 @@ void Logger::add_on_log_callback(std::function<void(uint8_t, const char *, const
   this->log_callback_.add(std::move(callback));
 }
 float Logger::get_setup_priority() const { return setup_priority::BUS + 500.0f; }
-static const char *const LOG_LEVELS[] = {"NONE", "ERROR", "WARN", "INFO", "CONFIG", "DEBUG", "VERBOSE", "VERY_VERBOSE"};
+static const LogString *const LOG_LEVELS[] = {LOG_STR("NONE"),    LOG_STR("ERROR"),       LOG_STR("WARN"),
+                                              LOG_STR("INFO"),    LOG_STR("CONFIG"),      LOG_STR("DEBUG"),
+                                              LOG_STR("VERBOSE"), LOG_STR("VERY_VERBOSE")};
 
 void Logger::dump_config() {
   ESP_LOGCONFIG(TAG,
                 "Logger:\n"
                 "  Max Level: %s\n"
                 "  Initial Level: %s",
-                LOG_LEVELS[ESPHOME_LOG_LEVEL], LOG_LEVELS[this->current_level_]);
+                LOG_STR_ARG(LOG_LEVELS[ESPHOME_LOG_LEVEL]), LOG_STR_ARG(LOG_LEVELS[this->current_level_]));
 #ifndef USE_HOST
   ESP_LOGCONFIG(TAG,
                 "  Log Baud Rate: %" PRIu32 "\n"
@@ -267,14 +269,14 @@ void Logger::dump_config() {
 #endif
 
   for (auto &it : this->log_levels_) {
-    ESP_LOGCONFIG(TAG, "  Level for '%s': %s", it.first.c_str(), LOG_LEVELS[it.second]);
+    ESP_LOGCONFIG(TAG, "  Level for '%s': %s", it.first.c_str(), LOG_STR_ARG(LOG_LEVELS[it.second]));
   }
 }
 
 void Logger::set_log_level(uint8_t level) {
   if (level > ESPHOME_LOG_LEVEL) {
     level = ESPHOME_LOG_LEVEL;
-    ESP_LOGW(TAG, "Cannot set log level higher than pre-compiled %s", LOG_LEVELS[ESPHOME_LOG_LEVEL]);
+    ESP_LOGW(TAG, "Cannot set log level higher than pre-compiled %s", LOG_STR_ARG(LOG_LEVELS[ESPHOME_LOG_LEVEL]));
   }
   this->current_level_ = level;
   this->level_callback_.call(level);