From a239460724a9a6787f69b9061f3252be5b313ed2 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@home-assistant.io>
Date: Sat, 8 Nov 2025 22:48:50 -0600
Subject: [PATCH] [remote_base] Optimize abbwelcome action memory usage - store
 static data in flash

---
 esphome/components/remote_base/__init__.py    |  6 ++--
 .../remote_base/abbwelcome_protocol.h         | 31 +++++++++++++------
 .../remote_transmitter/common-buttons.yaml    | 25 +++++++++++++++
 3 files changed, 50 insertions(+), 12 deletions(-)

diff --git a/esphome/components/remote_base/__init__.py b/esphome/components/remote_base/__init__.py
index 8d735ea563..d24d24b000 100644
--- a/esphome/components/remote_base/__init__.py
+++ b/esphome/components/remote_base/__init__.py
@@ -39,7 +39,7 @@ from esphome.const import (
     CONF_WAND_ID,
     CONF_ZERO,
 )
-from esphome.core import coroutine
+from esphome.core import ID, coroutine
 from esphome.schema_extractors import SCHEMA_EXTRACT, schema_extractor
 from esphome.util import Registry, SimpleRegistry
 
@@ -2104,7 +2104,9 @@ async def abbwelcome_action(var, config, args):
             )
             cg.add(var.set_data_template(template_))
         else:
-            cg.add(var.set_data_static(data_))
+            arr_id = ID(f"{var.base}_data", is_declaration=True, type=cg.uint8)
+            arr = cg.static_const_array(arr_id, cg.ArrayInitializer(*data_))
+            cg.add(var.set_data_static(arr, len(data_)))
 
 
 # Mirage
diff --git a/esphome/components/remote_base/abbwelcome_protocol.h b/esphome/components/remote_base/abbwelcome_protocol.h
index b258bd920b..2ed90c502e 100644
--- a/esphome/components/remote_base/abbwelcome_protocol.h
+++ b/esphome/components/remote_base/abbwelcome_protocol.h
@@ -214,10 +214,14 @@ template<typename... Ts> class ABBWelcomeAction : public RemoteTransmitterAction
   TEMPLATABLE_VALUE(uint8_t, message_type)
   TEMPLATABLE_VALUE(uint8_t, message_id)
   TEMPLATABLE_VALUE(bool, auto_message_id)
-  void set_data_static(std::vector<uint8_t> data) { data_static_ = std::move(data); }
-  void set_data_template(std::function<std::vector<uint8_t>(Ts...)> func) {
-    this->data_func_ = func;
-    has_data_func_ = true;
+  void set_data_template(std::vector<uint8_t> (*func)(Ts...)) {
+    this->data_.func = func;
+    this->static_ = false;
+  }
+  void set_data_static(const uint8_t *data, size_t len) {
+    this->data_.static_data.ptr = data;
+    this->data_.static_data.len = len;
+    this->static_ = true;
   }
   void encode(RemoteTransmitData *dst, Ts... x) override {
     ABBWelcomeData data;
@@ -228,19 +232,26 @@ template<typename... Ts> class ABBWelcomeAction : public RemoteTransmitterAction
     data.set_message_type(this->message_type_.value(x...));
     data.set_message_id(this->message_id_.value(x...));
     data.auto_message_id = this->auto_message_id_.value(x...);
-    if (has_data_func_) {
-      data.set_data(this->data_func_(x...));
+    std::vector<uint8_t> data_vec;
+    if (this->static_) {
+      data_vec.assign(this->data_.static_data.ptr, this->data_.static_data.ptr + this->data_.static_data.len);
     } else {
-      data.set_data(this->data_static_);
+      data_vec = this->data_.func(x...);
     }
+    data.set_data(data_vec);
     data.finalize();
     ABBWelcomeProtocol().encode(dst, data);
   }
 
  protected:
-  std::function<std::vector<uint8_t>(Ts...)> data_func_{};
-  std::vector<uint8_t> data_static_{};
-  bool has_data_func_{false};
+  bool static_{true};
+  union Data {
+    std::vector<uint8_t> (*func)(Ts...);
+    struct {
+      const uint8_t *ptr;
+      size_t len;
+    } static_data;
+  } data_;
 };
 
 }  // namespace remote_base
diff --git a/tests/components/remote_transmitter/common-buttons.yaml b/tests/components/remote_transmitter/common-buttons.yaml
index e9593cc97c..101d60a893 100644
--- a/tests/components/remote_transmitter/common-buttons.yaml
+++ b/tests/components/remote_transmitter/common-buttons.yaml
@@ -1,3 +1,11 @@
+number:
+  - platform: template
+    id: test_number
+    optimistic: true
+    min_value: 0
+    max_value: 255
+    step: 1
+
 button:
   - platform: template
     name: Beo4 audio mute
@@ -217,6 +225,23 @@ button:
           command: 0xEC
           rc_code_1: 0x0D
           rc_code_2: 0x0D
+  - platform: template
+    name: ABBWelcome static
+    on_press:
+      remote_transmitter.transmit_abbwelcome:
+        source_address: 0x1234
+        destination_address: 0x5678
+        message_type: 0x01
+        data: [0x10, 0x20, 0x30]
+  - platform: template
+    name: ABBWelcome lambda
+    on_press:
+      remote_transmitter.transmit_abbwelcome:
+        source_address: 0x1234
+        destination_address: 0x5678
+        message_type: 0x01
+        data: !lambda |-
+          return {(uint8_t)id(test_number).state, 0x20, 0x30};
   - platform: template
     name: Digital Write
     on_press: