From 34de46ececaf5ddac857358cf706c83f56fe6d03 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@home-assistant.io>
Date: Tue, 6 Jan 2026 14:08:58 -1000
Subject: [PATCH] [sun] Eliminate heap allocation in text sensor

---
 esphome/components/sun/text_sensor/sun_text_sensor.h | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/esphome/components/sun/text_sensor/sun_text_sensor.h b/esphome/components/sun/text_sensor/sun_text_sensor.h
index ce7d21fb86..5cb8fb001d 100644
--- a/esphome/components/sun/text_sensor/sun_text_sensor.h
+++ b/esphome/components/sun/text_sensor/sun_text_sensor.h
@@ -28,7 +28,13 @@ class SunTextSensor : public text_sensor::TextSensor, public PollingComponent {
       return;
     }
 
-    this->publish_state(res->strftime(this->format_));
+    char buf[128];
+    size_t len = res->strftime(buf, sizeof(buf), this->format_.c_str());
+    if (len > 0) {
+      this->publish_state(buf, len);
+    } else {
+      this->publish_state("ERROR");
+    }
   }
 
   void dump_config() override;