From 0439b6f7c4abe467359a9638e5343b60e97de9f4 Mon Sep 17 00:00:00 2001
From: Yurii <laxilef@gmail.com>
Date: Sun, 25 Oct 2026 04:50:43 +0300
Subject: [PATCH] perf: replace global buffer with MQTT config URL storage

---
 src/MqttTask.h | 5 +++--
 src/defines.h  | 2 --
 2 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/src/MqttTask.h b/src/MqttTask.h
index 41efccf..47ff63d 100644
--- a/src/MqttTask.h
+++ b/src/MqttTask.h
@@ -79,6 +79,7 @@ protected:
   MqttClient* client = nullptr;
   HaHelper* haHelper = nullptr;
   MqttWriter* writer = nullptr;
+  char configUrl[64] = {};
   UnitSystem currentUnitSystem = UnitSystem::METRIC;
   bool currentHomeAssistantDiscovery = false;
   std::unordered_map<uint8_t, Sensors::Settings> queueReconfigureSensors;
@@ -148,8 +149,8 @@ protected:
     this->haHelper->setDeviceName(PROJECT_NAME);
     this->haHelper->setWriter(this->writer);
 
-    sprintf(buffer, CONFIG_URL, WiFi.localIP().toString().c_str());
-    this->haHelper->setDeviceConfigUrl(buffer);
+    snprintf(this->configUrl, sizeof(this->configUrl), CONFIG_URL, WiFi.localIP().toString().c_str());
+    this->haHelper->setDeviceConfigUrl(this->configUrl);
   }
 
   void loop() {
diff --git a/src/defines.h b/src/defines.h
index ad6f2e1..9f8ec19 100644
--- a/src/defines.h
+++ b/src/defines.h
@@ -160,5 +160,3 @@ enum class ChannelDisablingAction : uint8_t {
   ZERO_SETPOINT         = 1,
   OFF_AND_ZERO_SETPOINT = 2
 };
-
-char buffer[255];