From 380660dcdb334cd936bd7eef2d9fa403951911dc Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@koston.org>
Date: Mon, 9 Nov 2026 08:24:27 -0600
Subject: [PATCH] [esp32_ble_server] Size the BLE2902 value buffer to its 2
 byte value (#22454)

---
 esphome/components/esp32_ble_server/ble_2902.cpp | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/esphome/components/esp32_ble_server/ble_2902.cpp b/esphome/components/esp32_ble_server/ble_2902.cpp
index 90d0871a967..d1f4a4c7776 100644
--- a/esphome/components/esp32_ble_server/ble_2902.cpp
+++ b/esphome/components/esp32_ble_server/ble_2902.cpp
@@ -3,14 +3,13 @@
 
 #ifdef USE_ESP32
 
-#include <cstring>
+#include <esp_gatt_defs.h>
 
 namespace esphome::esp32_ble_server {
 
-BLE2902::BLE2902() : BLEDescriptor(esp32_ble::ESPBTUUID::from_uint16(0x2902)) {
-  this->value_.attr_len = 2;
-  uint8_t data[2] = {0, 0};
-  memcpy(this->value_.attr_value, data, 2);
+// The client configuration value is always 2 bytes
+BLE2902::BLE2902() : BLEDescriptor(esp32_ble::ESPBTUUID::from_uint16(ESP_GATT_UUID_CHAR_CLIENT_CONFIG), 2) {
+  this->set_value({0, 0});
 }
 
 }  // namespace esphome::esp32_ble_server