From 64da6d46e99e7d25ee132c2a5a30c64d46045b58 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@koston.org>
Date: Mon, 5 Jan 2026 17:18:06 -1000
Subject: [PATCH] [ruuvi_ble] Reduce heap allocation with stack-based string
 formatting (#12997)

---
 esphome/components/ruuvi_ble/ruuvi_ble.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/esphome/components/ruuvi_ble/ruuvi_ble.cpp b/esphome/components/ruuvi_ble/ruuvi_ble.cpp
index bdd012cf5c4..1b126bdef0e 100644
--- a/esphome/components/ruuvi_ble/ruuvi_ble.cpp
+++ b/esphome/components/ruuvi_ble/ruuvi_ble.cpp
@@ -99,7 +99,8 @@ bool RuuviListener::parse_device(const esp32_ble_tracker::ESPBTDevice &device) {
   if (!res.has_value())
     return false;
 
-  ESP_LOGD(TAG, "Got RuuviTag (%s):", device.address_str().c_str());
+  char addr_buf[MAC_ADDRESS_PRETTY_BUFFER_SIZE];
+  ESP_LOGD(TAG, "Got RuuviTag (%s):", device.address_str_to(addr_buf));
 
   if (res->humidity.has_value()) {
     ESP_LOGD(TAG, "  Humidity: %.2f%%", *res->humidity);