diff --git a/CODEOWNERS b/CODEOWNERS
index f96e43d5b7..5eb1f863f2 100644
--- a/CODEOWNERS
+++ b/CODEOWNERS
@@ -85,6 +85,7 @@ esphome/components/bmp581/* @kahrendt
 esphome/components/bp1658cj/* @Cossid
 esphome/components/bp5758d/* @Cossid
 esphome/components/button/* @esphome/core
+esphome/components/bytebuffer/* @clydebarrow
 esphome/components/canbus/* @danielschramm @mvturnho
 esphome/components/cap1188/* @mreditor97
 esphome/components/captive_portal/* @OttoWinter
diff --git a/esphome/components/bytebuffer/__init__.py b/esphome/components/bytebuffer/__init__.py
new file mode 100644
index 0000000000..3c7c695118
--- /dev/null
+++ b/esphome/components/bytebuffer/__init__.py
@@ -0,0 +1,5 @@
+CODEOWNERS = ["@clydebarrow"]
+
+# Allows bytebuffer to be configured in yaml, to allow use of the C++ api.
+
+CONFIG_SCHEMA = {}
diff --git a/esphome/components/bytebuffer/bytebuffer.h b/esphome/components/bytebuffer/bytebuffer.h
new file mode 100644
index 0000000000..030484ce32
--- /dev/null
+++ b/esphome/components/bytebuffer/bytebuffer.h
@@ -0,0 +1,421 @@
+#pragma once
+
+#include <utility>
+#include <vector>
+#include <cinttypes>
+#include <cstddef>
+#include "esphome/core/helpers.h"
+
+namespace esphome {
+namespace bytebuffer {
+
+enum Endian { LITTLE, BIG };
+
+/**
+ * A class modelled on the Java ByteBuffer class. It wraps a vector of bytes and permits putting and getting
+ * items of various sizes, with an automatically incremented position.
+ *
+ * There are three variables maintained pointing into the buffer:
+ *
+ * capacity: the maximum amount of data that can be stored - set on construction and cannot be changed
+ * limit: the limit of the data currently available to get or put
+ * position: the current insert or extract position
+ *
+ * 0 <= position <= limit <= capacity
+ *
+ * In addition a mark can be set to the current position with mark(). A subsequent call to reset() will restore
+ * the position to the mark.
+ *
+ * The buffer can be marked to be little-endian (default) or big-endian. All subsequent operations will use that order.
+ *
+ * The flip() operation will reset the position to 0 and limit to the current position. This is useful for reading
+ * data from a buffer after it has been written.
+ *
+ * The code is defined here in the header file rather than in a .cpp file, so that it does not get compiled if not used.
+ * The templated functions ensure that only those typed functions actually used are compiled. The functions
+ * are implicitly inline-able which will aid performance.
+ */
+class ByteBuffer {
+ public:
+  // Default constructor (compatibility with TEMPLATABLE_VALUE)
+  // Creates a zero-length ByteBuffer which is little use to anybody.
+  ByteBuffer() : ByteBuffer(std::vector<uint8_t>()) {}
+
+  /**
+   * Create a new Bytebuffer with the given capacity
+   */
+  ByteBuffer(size_t capacity, Endian endianness = LITTLE)
+      : data_(std::vector<uint8_t>(capacity)), endianness_(endianness), limit_(capacity){};
+
+  // templated functions to implement putting and getting data of various types. There are two flavours of all
+  // functions - one that uses the position as the offset, and updates the position accordingly, and one that
+  // takes an explicit offset and does not update the position.
+  // Separate temnplates are provided for types that fit into 32 bits and those that are bigger. These delegate
+  // the actual put/get to common code based around those sizes.
+  // This reduces the code size and execution time for smaller types. A similar structure for e.g. 16 bits is unlikely
+  // to provide any further benefit given that all target platforms are native 32 bit.
+
+  template<typename T>
+  T get(typename std::enable_if<std::is_integral<T>::value, T>::type * = 0,
+        typename std::enable_if<(sizeof(T) <= sizeof(uint32_t)), T>::type * = 0) {
+    // integral types that fit into 32 bit
+    return static_cast<T>(this->get_uint32_(sizeof(T)));
+  }
+
+  template<typename T>
+  T get(size_t offset, typename std::enable_if<std::is_integral<T>::value, T>::type * = 0,
+        typename std::enable_if<(sizeof(T) <= sizeof(uint32_t)), T>::type * = 0) {
+    return static_cast<T>(this->get_uint32_(offset, sizeof(T)));
+  }
+
+  template<typename T>
+  void put(const T &value, typename std::enable_if<std::is_integral<T>::value, T>::type * = 0,
+           typename std::enable_if<(sizeof(T) <= sizeof(uint32_t)), T>::type * = 0) {
+    this->put_uint32_(static_cast<uint32_t>(value), sizeof(T));
+  }
+
+  template<typename T>
+  void put(const T &value, size_t offset, typename std::enable_if<std::is_integral<T>::value, T>::type * = 0,
+           typename std::enable_if<(sizeof(T) <= sizeof(uint32_t)), T>::type * = 0) {
+    this->put_uint32_(static_cast<uint32_t>(value), offset, sizeof(T));
+  }
+
+  // integral types that do not fit into 32 bit (basically only 64 bit types)
+  template<typename T>
+  T get(typename std::enable_if<std::is_integral<T>::value, T>::type * = 0,
+        typename std::enable_if<(sizeof(T) == sizeof(uint64_t)), T>::type * = 0) {
+    return static_cast<T>(this->get_uint64_(sizeof(T)));
+  }
+
+  template<typename T>
+  T get(size_t offset, typename std::enable_if<std::is_integral<T>::value, T>::type * = 0,
+        typename std::enable_if<(sizeof(T) == sizeof(uint64_t)), T>::type * = 0) {
+    return static_cast<T>(this->get_uint64_(offset, sizeof(T)));
+  }
+
+  template<typename T>
+  void put(const T &value, typename std::enable_if<std::is_integral<T>::value, T>::type * = 0,
+           typename std::enable_if<(sizeof(T) == sizeof(uint64_t)), T>::type * = 0) {
+    this->put_uint64_(value, sizeof(T));
+  }
+
+  template<typename T>
+  void put(const T &value, size_t offset, typename std::enable_if<std::is_integral<T>::value, T>::type * = 0,
+           typename std::enable_if<(sizeof(T) == sizeof(uint64_t)), T>::type * = 0) {
+    this->put_uint64_(static_cast<uint64_t>(value), offset, sizeof(T));
+  }
+
+  // floating point types. Caters for 32 and 64 bit floating point.
+  template<typename T>
+  T get(typename std::enable_if<std::is_floating_point<T>::value, T>::type * = 0,
+        typename std::enable_if<(sizeof(T) == sizeof(uint32_t)), T>::type * = 0) {
+    return bit_cast<T>(this->get_uint32_(sizeof(T)));
+  }
+
+  template<typename T>
+  T get(typename std::enable_if<std::is_floating_point<T>::value, T>::type * = 0,
+        typename std::enable_if<(sizeof(T) == sizeof(uint64_t)), T>::type * = 0) {
+    return bit_cast<T>(this->get_uint64_(sizeof(T)));
+  }
+
+  template<typename T>
+  T get(size_t offset, typename std::enable_if<std::is_floating_point<T>::value, T>::type * = 0,
+        typename std::enable_if<(sizeof(T) == sizeof(uint32_t)), T>::type * = 0) {
+    return bit_cast<T>(this->get_uint32_(offset, sizeof(T)));
+  }
+
+  template<typename T>
+  T get(size_t offset, typename std::enable_if<std::is_floating_point<T>::value, T>::type * = 0,
+        typename std::enable_if<(sizeof(T) == sizeof(uint64_t)), T>::type * = 0) {
+    return bit_cast<T>(this->get_uint64_(offset, sizeof(T)));
+  }
+  template<typename T>
+  void put(const T &value, typename std::enable_if<std::is_floating_point<T>::value, T>::type * = 0,
+           typename std::enable_if<(sizeof(T) <= sizeof(uint32_t)), T>::type * = 0) {
+    this->put_uint32_(bit_cast<uint32_t>(value), sizeof(T));
+  }
+
+  template<typename T>
+  void put(const T &value, typename std::enable_if<std::is_floating_point<T>::value, T>::type * = 0,
+           typename std::enable_if<(sizeof(T) == sizeof(uint64_t)), T>::type * = 0) {
+    this->put_uint64_(bit_cast<uint64_t>(value), sizeof(T));
+  }
+
+  template<typename T>
+  void put(const T &value, size_t offset, typename std::enable_if<std::is_floating_point<T>::value, T>::type * = 0,
+           typename std::enable_if<(sizeof(T) <= sizeof(uint32_t)), T>::type * = 0) {
+    this->put_uint32_(bit_cast<uint32_t>(value), offset, sizeof(T));
+  }
+
+  template<typename T>
+  void put(const T &value, size_t offset, typename std::enable_if<std::is_floating_point<T>::value, T>::type * = 0,
+           typename std::enable_if<(sizeof(T) == sizeof(uint64_t)), T>::type * = 0) {
+    this->put_uint64_(bit_cast<uint64_t>(value), offset, sizeof(T));
+  }
+
+  template<typename T> static ByteBuffer wrap(T value, Endian endianness = LITTLE) {
+    ByteBuffer buffer = ByteBuffer(sizeof(T), endianness);
+    buffer.put(value);
+    buffer.flip();
+    return buffer;
+  }
+
+  static ByteBuffer wrap(std::vector<uint8_t> const &data, Endian endianness = LITTLE) {
+    ByteBuffer buffer = {data};
+    buffer.endianness_ = endianness;
+    return buffer;
+  }
+
+  static ByteBuffer wrap(const uint8_t *ptr, size_t len, Endian endianness = LITTLE) {
+    return wrap(std::vector<uint8_t>(ptr, ptr + len), endianness);
+  }
+
+  // convenience functions with explicit types named..
+  void put_float(float value) { this->put(value); }
+  void put_double(double value) { this->put(value); }
+
+  uint8_t get_uint8() { return this->data_[this->position_++]; }
+  // Get a 16 bit unsigned value, increment by 2
+  uint16_t get_uint16() { return this->get<uint16_t>(); }
+  // Get a 24 bit unsigned value, increment by 3
+  uint32_t get_uint24() { return this->get_uint32_(3); };
+  // Get a 32 bit unsigned value, increment by 4
+  uint32_t get_uint32() { return this->get<uint32_t>(); };
+  // Get a 64 bit unsigned value, increment by 8
+  uint64_t get_uint64() { return this->get<uint64_t>(); };
+  // Signed versions of the get functions
+  uint8_t get_int8() { return static_cast<int8_t>(this->get_uint8()); };
+  int16_t get_int16() { return this->get<uint16_t>(); }
+  int32_t get_int32() { return this->get<int32_t>(); }
+  int64_t get_int64() { return this->get<int64_t>(); }
+  // Get a float value, increment by 4
+  float get_float() { return this->get<float>(); }
+  // Get a double value, increment by 8
+  double get_double() { return this->get<double>(); }
+
+  // Get a bool value, increment by 1
+  bool get_bool() { return static_cast<bool>(this->get_uint8()); }
+
+  uint32_t get_int24(size_t offset) {
+    auto value = this->get_uint24(offset);
+    uint32_t mask = (~static_cast<uint32_t>(0)) << 23;
+    if ((value & mask) != 0)
+      value |= mask;
+    return value;
+  }
+
+  uint32_t get_int24() {
+    auto value = this->get_uint24();
+    uint32_t mask = (~static_cast<uint32_t>(0)) << 23;
+    if ((value & mask) != 0)
+      value |= mask;
+    return value;
+  }
+  std::vector<uint8_t> get_vector(size_t length, size_t offset) {
+    auto start = this->data_.begin() + offset;
+    return {start, start + length};
+  }
+
+  std::vector<uint8_t> get_vector(size_t length) {
+    auto result = this->get_vector(length, this->position_);
+    this->position_ += length;
+    return result;
+  }
+
+  // Convenience named functions
+  void put_uint8(uint8_t value) { this->data_[this->position_++] = value; }
+  void put_uint16(uint16_t value) { this->put(value); }
+  void put_uint24(uint32_t value) { this->put_uint32_(value, 3); }
+  void put_uint32(uint32_t value) { this->put(value); }
+  void put_uint64(uint64_t value) { this->put(value); }
+  // Signed versions of the put functions
+  void put_int8(int8_t value) { this->put_uint8(static_cast<uint8_t>(value)); }
+  void put_int16(int16_t value) { this->put(value); }
+  void put_int24(int32_t value) { this->put_uint32_(value, 3); }
+  void put_int32(int32_t value) { this->put(value); }
+  void put_int64(int64_t value) { this->put(value); }
+  // Extra put functions
+  void put_bool(bool value) { this->put_uint8(value); }
+
+  // versions of the above with an offset, these do not update the position
+
+  uint64_t get_uint64(size_t offset) { return this->get<uint64_t>(offset); }
+  uint32_t get_uint24(size_t offset) { return this->get_uint32_(offset, 3); };
+  double get_double(size_t offset) { return get<double>(offset); }
+
+  // Get one byte from the buffer, increment position by 1
+  uint8_t get_uint8(size_t offset) { return this->data_[offset]; }
+  // Get a 16 bit unsigned value, increment by 2
+  uint16_t get_uint16(size_t offset) { return get<uint16_t>(offset); }
+  // Get a 24 bit unsigned value, increment by 3
+  uint32_t get_uint32(size_t offset) { return this->get<uint32_t>(offset); };
+  // Get a 64 bit unsigned value, increment by 8
+  uint8_t get_int8(size_t offset) { return get<int8_t>(offset); }
+  int16_t get_int16(size_t offset) { return get<int16_t>(offset); }
+  int32_t get_int32(size_t offset) { return get<int32_t>(offset); }
+  int64_t get_int64(size_t offset) { return get<int64_t>(offset); }
+  // Get a float value, increment by 4
+  float get_float(size_t offset) { return get<float>(offset); }
+  // Get a double value, increment by 8
+
+  // Get a bool value, increment by 1
+  bool get_bool(size_t offset) { return this->get_uint8(offset); }
+
+  void put_uint8(uint8_t value, size_t offset) { this->data_[offset] = value; }
+  void put_uint16(uint16_t value, size_t offset) { this->put(value, offset); }
+  void put_uint24(uint32_t value, size_t offset) { this->put(value, offset); }
+  void put_uint32(uint32_t value, size_t offset) { this->put(value, offset); }
+  void put_uint64(uint64_t value, size_t offset) { this->put(value, offset); }
+  // Signed versions of the put functions
+  void put_int8(int8_t value, size_t offset) { this->put_uint8(static_cast<uint8_t>(value), offset); }
+  void put_int16(int16_t value, size_t offset) { this->put(value, offset); }
+  void put_int24(int32_t value, size_t offset) { this->put_uint32_(value, offset, 3); }
+  void put_int32(int32_t value, size_t offset) { this->put(value, offset); }
+  void put_int64(int64_t value, size_t offset) { this->put(value, offset); }
+  // Extra put functions
+  void put_float(float value, size_t offset) { this->put(value, offset); }
+  void put_double(double value, size_t offset) { this->put(value, offset); }
+  void put_bool(bool value, size_t offset) { this->put_uint8(value, offset); }
+  void put(const std::vector<uint8_t> &value, size_t offset) {
+    std::copy(value.begin(), value.end(), this->data_.begin() + offset);
+  }
+  void put_vector(const std::vector<uint8_t> &value, size_t offset) { this->put(value, offset); }
+  void put(const std::vector<uint8_t> &value) {
+    this->put_vector(value, this->position_);
+    this->position_ += value.size();
+  }
+  void put_vector(const std::vector<uint8_t> &value) { this->put(value); }
+
+  // Getters
+
+  inline size_t get_capacity() const { return this->data_.size(); }
+  inline size_t get_position() const { return this->position_; }
+  inline size_t get_limit() const { return this->limit_; }
+  inline size_t get_remaining() const { return this->get_limit() - this->get_position(); }
+  inline Endian get_endianness() const { return this->endianness_; }
+  inline void mark() { this->mark_ = this->position_; }
+  inline void big_endian() { this->endianness_ = BIG; }
+  inline void little_endian() { this->endianness_ = LITTLE; }
+  // retrieve a pointer to the underlying data.
+  std::vector<uint8_t> get_data() { return this->data_; };
+
+  void get_bytes(void *dest, size_t length) {
+    std::copy(this->data_.begin() + this->position_, this->data_.begin() + this->position_ + length, (uint8_t *) dest);
+    this->position_ += length;
+  }
+
+  void get_bytes(void *dest, size_t length, size_t offset) {
+    std::copy(this->data_.begin() + offset, this->data_.begin() + offset + length, (uint8_t *) dest);
+  }
+
+  void rewind() { this->position_ = 0; }
+  void reset() { this->position_ = this->mark_; }
+
+  void set_limit(size_t limit) { this->limit_ = limit; }
+  void set_position(size_t position) { this->position_ = position; }
+  void clear() {
+    this->limit_ = this->get_capacity();
+    this->position_ = 0;
+  }
+  void flip() {
+    this->limit_ = this->position_;
+    this->position_ = 0;
+  }
+
+ protected:
+  uint64_t get_uint64_(size_t offset, size_t length) const {
+    uint64_t value = 0;
+    if (this->endianness_ == LITTLE) {
+      offset += length;
+      while (length-- != 0) {
+        value <<= 8;
+        value |= this->data_[--offset];
+      }
+    } else {
+      while (length-- != 0) {
+        value <<= 8;
+        value |= this->data_[offset++];
+      }
+    }
+    return value;
+  }
+
+  uint64_t get_uint64_(size_t length) {
+    auto result = this->get_uint64_(this->position_, length);
+    this->position_ += length;
+    return result;
+  }
+  uint32_t get_uint32_(size_t offset, size_t length) const {
+    uint32_t value = 0;
+    if (this->endianness_ == LITTLE) {
+      offset += length;
+      while (length-- != 0) {
+        value <<= 8;
+        value |= this->data_[--offset];
+      }
+    } else {
+      while (length-- != 0) {
+        value <<= 8;
+        value |= this->data_[offset++];
+      }
+    }
+    return value;
+  }
+
+  uint32_t get_uint32_(size_t length) {
+    auto result = this->get_uint32_(this->position_, length);
+    this->position_ += length;
+    return result;
+  }
+
+  /// Putters
+
+  void put_uint64_(uint64_t value, size_t length) {
+    this->put_uint64_(value, this->position_, length);
+    this->position_ += length;
+  }
+  void put_uint32_(uint32_t value, size_t length) {
+    this->put_uint32_(value, this->position_, length);
+    this->position_ += length;
+  }
+
+  void put_uint64_(uint64_t value, size_t offset, size_t length) {
+    if (this->endianness_ == LITTLE) {
+      while (length-- != 0) {
+        this->data_[offset++] = static_cast<uint8_t>(value);
+        value >>= 8;
+      }
+    } else {
+      offset += length;
+      while (length-- != 0) {
+        this->data_[--offset] = static_cast<uint8_t>(value);
+        value >>= 8;
+      }
+    }
+  }
+
+  void put_uint32_(uint32_t value, size_t offset, size_t length) {
+    if (this->endianness_ == LITTLE) {
+      while (length-- != 0) {
+        this->data_[offset++] = static_cast<uint8_t>(value);
+        value >>= 8;
+      }
+    } else {
+      offset += length;
+      while (length-- != 0) {
+        this->data_[--offset] = static_cast<uint8_t>(value);
+        value >>= 8;
+      }
+    }
+  }
+  ByteBuffer(std::vector<uint8_t> const &data) : data_(data), limit_(data.size()) {}
+
+  std::vector<uint8_t> data_;
+  Endian endianness_{LITTLE};
+  size_t position_{0};
+  size_t mark_{0};
+  size_t limit_{0};
+};
+
+}  // namespace bytebuffer
+}  // namespace esphome
diff --git a/esphome/components/lvgl/__init__.py b/esphome/components/lvgl/__init__.py
index 215fdecdb5..4a1a26cc0b 100644
--- a/esphome/components/lvgl/__init__.py
+++ b/esphome/components/lvgl/__init__.py
@@ -71,6 +71,7 @@ from .widgets.meter import meter_spec
 from .widgets.msgbox import MSGBOX_SCHEMA, msgboxes_to_code
 from .widgets.obj import obj_spec
 from .widgets.page import add_pages, generate_page_triggers, page_spec
+from .widgets.qrcode import qr_code_spec
 from .widgets.roller import roller_spec
 from .widgets.slider import slider_spec
 from .widgets.spinbox import spinbox_spec
@@ -109,6 +110,7 @@ for w_type in (
     spinbox_spec,
     keyboard_spec,
     tileview_spec,
+    qr_code_spec,
 ):
     WIDGET_TYPES[w_type.name] = w_type
 
diff --git a/esphome/components/lvgl/widgets/qrcode.py b/esphome/components/lvgl/widgets/qrcode.py
new file mode 100644
index 0000000000..742b538938
--- /dev/null
+++ b/esphome/components/lvgl/widgets/qrcode.py
@@ -0,0 +1,54 @@
+import esphome.codegen as cg
+import esphome.config_validation as cv
+from esphome.const import CONF_SIZE, CONF_TEXT
+from esphome.cpp_generator import MockObjClass
+
+from ..defines import CONF_MAIN, literal
+from ..lv_validation import color, color_retmapper, lv_text
+from ..lvcode import LocalVariable, lv, lv_expr
+from ..schemas import TEXT_SCHEMA
+from ..types import WidgetType, lv_obj_t
+from . import Widget
+
+CONF_QRCODE = "qrcode"
+CONF_DARK_COLOR = "dark_color"
+CONF_LIGHT_COLOR = "light_color"
+
+QRCODE_SCHEMA = TEXT_SCHEMA.extend(
+    {
+        cv.Optional(CONF_DARK_COLOR, default="black"): color,
+        cv.Optional(CONF_LIGHT_COLOR, default="white"): color,
+        cv.Required(CONF_SIZE): cv.int_,
+    }
+)
+
+
+class QrCodeType(WidgetType):
+    def __init__(self):
+        super().__init__(
+            CONF_QRCODE,
+            lv_obj_t,
+            (CONF_MAIN,),
+            QRCODE_SCHEMA,
+            modify_schema=TEXT_SCHEMA,
+        )
+
+    def get_uses(self):
+        return ("canvas", "img")
+
+    def obj_creator(self, parent: MockObjClass, config: dict):
+        dark_color = color_retmapper(config[CONF_DARK_COLOR])
+        light_color = color_retmapper(config[CONF_LIGHT_COLOR])
+        size = config[CONF_SIZE]
+        return lv_expr.call("qrcode_create", parent, size, dark_color, light_color)
+
+    async def to_code(self, w: Widget, config):
+        if (value := config.get(CONF_TEXT)) is not None:
+            value = await lv_text.process(value)
+            with LocalVariable(
+                "qr_text", cg.const_char_ptr, value, modifier=""
+            ) as str_obj:
+                lv.qrcode_update(w.obj, str_obj, literal(f"strlen({str_obj})"))
+
+
+qr_code_spec = QrCodeType()
diff --git a/esphome/core/bytebuffer.cpp b/esphome/core/bytebuffer.cpp
deleted file mode 100644
index 9dd32bf87a..0000000000
--- a/esphome/core/bytebuffer.cpp
+++ /dev/null
@@ -1,167 +0,0 @@
-#include "bytebuffer.h"
-#include <cassert>
-#include "esphome/core/helpers.h"
-
-#include <list>
-#include <vector>
-
-namespace esphome {
-
-ByteBuffer ByteBuffer::wrap(const uint8_t *ptr, size_t len, Endian endianness) {
-  // there is a double copy happening here, could be optimized but at cost of clarity.
-  std::vector<uint8_t> data(ptr, ptr + len);
-  ByteBuffer buffer = {data};
-  buffer.endianness_ = endianness;
-  return buffer;
-}
-
-ByteBuffer ByteBuffer::wrap(std::vector<uint8_t> const &data, Endian endianness) {
-  ByteBuffer buffer = {data};
-  buffer.endianness_ = endianness;
-  return buffer;
-}
-
-ByteBuffer ByteBuffer::wrap(uint8_t value) {
-  ByteBuffer buffer = ByteBuffer(1);
-  buffer.put_uint8(value);
-  buffer.flip();
-  return buffer;
-}
-
-ByteBuffer ByteBuffer::wrap(uint16_t value, Endian endianness) {
-  ByteBuffer buffer = ByteBuffer(2, endianness);
-  buffer.put_uint16(value);
-  buffer.flip();
-  return buffer;
-}
-
-ByteBuffer ByteBuffer::wrap(uint32_t value, Endian endianness) {
-  ByteBuffer buffer = ByteBuffer(4, endianness);
-  buffer.put_uint32(value);
-  buffer.flip();
-  return buffer;
-}
-
-ByteBuffer ByteBuffer::wrap(uint64_t value, Endian endianness) {
-  ByteBuffer buffer = ByteBuffer(8, endianness);
-  buffer.put_uint64(value);
-  buffer.flip();
-  return buffer;
-}
-
-ByteBuffer ByteBuffer::wrap(float value, Endian endianness) {
-  ByteBuffer buffer = ByteBuffer(sizeof(float), endianness);
-  buffer.put_float(value);
-  buffer.flip();
-  return buffer;
-}
-
-ByteBuffer ByteBuffer::wrap(double value, Endian endianness) {
-  ByteBuffer buffer = ByteBuffer(sizeof(double), endianness);
-  buffer.put_double(value);
-  buffer.flip();
-  return buffer;
-}
-
-void ByteBuffer::set_limit(size_t limit) {
-  assert(limit <= this->get_capacity());
-  this->limit_ = limit;
-}
-void ByteBuffer::set_position(size_t position) {
-  assert(position <= this->get_limit());
-  this->position_ = position;
-}
-void ByteBuffer::clear() {
-  this->limit_ = this->get_capacity();
-  this->position_ = 0;
-}
-void ByteBuffer::flip() {
-  this->limit_ = this->position_;
-  this->position_ = 0;
-}
-
-/// Getters
-uint8_t ByteBuffer::get_uint8() {
-  assert(this->get_remaining() >= 1);
-  return this->data_[this->position_++];
-}
-uint64_t ByteBuffer::get_uint(size_t length) {
-  assert(this->get_remaining() >= length);
-  uint64_t value = 0;
-  if (this->endianness_ == LITTLE) {
-    this->position_ += length;
-    auto index = this->position_;
-    while (length-- != 0) {
-      value <<= 8;
-      value |= this->data_[--index];
-    }
-  } else {
-    while (length-- != 0) {
-      value <<= 8;
-      value |= this->data_[this->position_++];
-    }
-  }
-  return value;
-}
-
-uint32_t ByteBuffer::get_int24() {
-  auto value = this->get_uint24();
-  uint32_t mask = (~static_cast<uint32_t>(0)) << 23;
-  if ((value & mask) != 0)
-    value |= mask;
-  return value;
-}
-float ByteBuffer::get_float() {
-  assert(this->get_remaining() >= sizeof(float));
-  return bit_cast<float>(this->get_uint32());
-}
-double ByteBuffer::get_double() {
-  assert(this->get_remaining() >= sizeof(double));
-  return bit_cast<double>(this->get_uint64());
-}
-
-std::vector<uint8_t> ByteBuffer::get_vector(size_t length) {
-  assert(this->get_remaining() >= length);
-  auto start = this->data_.begin() + this->position_;
-  this->position_ += length;
-  return {start, start + length};
-}
-
-/// Putters
-void ByteBuffer::put_uint8(uint8_t value) {
-  assert(this->get_remaining() >= 1);
-  this->data_[this->position_++] = value;
-}
-
-void ByteBuffer::put_uint(uint64_t value, size_t length) {
-  assert(this->get_remaining() >= length);
-  if (this->endianness_ == LITTLE) {
-    while (length-- != 0) {
-      this->data_[this->position_++] = static_cast<uint8_t>(value);
-      value >>= 8;
-    }
-  } else {
-    this->position_ += length;
-    auto index = this->position_;
-    while (length-- != 0) {
-      this->data_[--index] = static_cast<uint8_t>(value);
-      value >>= 8;
-    }
-  }
-}
-void ByteBuffer::put_float(float value) {
-  static_assert(sizeof(float) == sizeof(uint32_t), "Float sizes other than 32 bit not supported");
-  assert(this->get_remaining() >= sizeof(float));
-  this->put_uint32(bit_cast<uint32_t>(value));
-}
-void ByteBuffer::put_double(double value) {
-  static_assert(sizeof(double) == sizeof(uint64_t), "Double sizes other than 64 bit not supported");
-  assert(this->get_remaining() >= sizeof(double));
-  this->put_uint64(bit_cast<uint64_t>(value));
-}
-void ByteBuffer::put_vector(const std::vector<uint8_t> &value) {
-  assert(this->get_remaining() >= value.size());
-  std::copy(value.begin(), value.end(), this->data_.begin() + this->position_);
-  this->position_ += value.size();
-}
-}  // namespace esphome
diff --git a/esphome/core/bytebuffer.h b/esphome/core/bytebuffer.h
deleted file mode 100644
index d44d01f275..0000000000
--- a/esphome/core/bytebuffer.h
+++ /dev/null
@@ -1,144 +0,0 @@
-#pragma once
-
-#include <utility>
-#include <vector>
-#include <cinttypes>
-#include <cstddef>
-
-namespace esphome {
-
-enum Endian { LITTLE, BIG };
-
-/**
- * A class modelled on the Java ByteBuffer class. It wraps a vector of bytes and permits putting and getting
- * items of various sizes, with an automatically incremented position.
- *
- * There are three variables maintained pointing into the buffer:
- *
- * capacity: the maximum amount of data that can be stored - set on construction and cannot be changed
- * limit: the limit of the data currently available to get or put
- * position: the current insert or extract position
- *
- * 0 <= position <= limit <= capacity
- *
- * In addition a mark can be set to the current position with mark(). A subsequent call to reset() will restore
- * the position to the mark.
- *
- * The buffer can be marked to be little-endian (default) or big-endian. All subsequent operations will use that order.
- *
- * The flip() operation will reset the position to 0 and limit to the current position. This is useful for reading
- * data from a buffer after it has been written.
- *
- */
-class ByteBuffer {
- public:
-  // Default constructor (compatibility with TEMPLATABLE_VALUE)
-  ByteBuffer() : ByteBuffer(std::vector<uint8_t>()) {}
-  /**
-   * Create a new Bytebuffer with the given capacity
-   */
-  ByteBuffer(size_t capacity, Endian endianness = LITTLE)
-      : data_(std::vector<uint8_t>(capacity)), endianness_(endianness), limit_(capacity){};
-  /**
-   * Wrap an existing vector in a ByteBufffer
-   */
-  static ByteBuffer wrap(std::vector<uint8_t> const &data, Endian endianness = LITTLE);
-  /**
-   * Wrap an existing array in a ByteBuffer. Note that this will create a copy of the data.
-   */
-  static ByteBuffer wrap(const uint8_t *ptr, size_t len, Endian endianness = LITTLE);
-  // Convenience functions to create a ByteBuffer from a value
-  static ByteBuffer wrap(uint8_t value);
-  static ByteBuffer wrap(uint16_t value, Endian endianness = LITTLE);
-  static ByteBuffer wrap(uint32_t value, Endian endianness = LITTLE);
-  static ByteBuffer wrap(uint64_t value, Endian endianness = LITTLE);
-  static ByteBuffer wrap(int8_t value) { return wrap(static_cast<uint8_t>(value)); }
-  static ByteBuffer wrap(int16_t value, Endian endianness = LITTLE) {
-    return wrap(static_cast<uint16_t>(value), endianness);
-  }
-  static ByteBuffer wrap(int32_t value, Endian endianness = LITTLE) {
-    return wrap(static_cast<uint32_t>(value), endianness);
-  }
-  static ByteBuffer wrap(int64_t value, Endian endianness = LITTLE) {
-    return wrap(static_cast<uint64_t>(value), endianness);
-  }
-  static ByteBuffer wrap(float value, Endian endianness = LITTLE);
-  static ByteBuffer wrap(double value, Endian endianness = LITTLE);
-  static ByteBuffer wrap(bool value) { return wrap(static_cast<uint8_t>(value)); }
-
-  // Get an integral value from the buffer, increment position by length
-  uint64_t get_uint(size_t length);
-  // Get one byte from the buffer, increment position by 1
-  uint8_t get_uint8();
-  // Get a 16 bit unsigned value, increment by 2
-  uint16_t get_uint16() { return static_cast<uint16_t>(this->get_uint(sizeof(uint16_t))); };
-  // Get a 24 bit unsigned value, increment by 3
-  uint32_t get_uint24() { return static_cast<uint32_t>(this->get_uint(3)); };
-  // Get a 32 bit unsigned value, increment by 4
-  uint32_t get_uint32() { return static_cast<uint32_t>(this->get_uint(sizeof(uint32_t))); };
-  // Get a 64 bit unsigned value, increment by 8
-  uint64_t get_uint64() { return this->get_uint(sizeof(uint64_t)); };
-  // Signed versions of the get functions
-  uint8_t get_int8() { return static_cast<int8_t>(this->get_uint8()); };
-  int16_t get_int16() { return static_cast<int16_t>(this->get_uint(sizeof(int16_t))); }
-  uint32_t get_int24();
-  int32_t get_int32() { return static_cast<int32_t>(this->get_uint(sizeof(int32_t))); }
-  int64_t get_int64() { return static_cast<int64_t>(this->get_uint(sizeof(int64_t))); }
-  // Get a float value, increment by 4
-  float get_float();
-  // Get a double value, increment by 8
-  double get_double();
-  // Get a bool value, increment by 1
-  bool get_bool() { return this->get_uint8(); }
-  // Get vector of bytes, increment by length
-  std::vector<uint8_t> get_vector(size_t length);
-
-  // Put values into the buffer, increment the position accordingly
-  // put any integral value, length represents the number of bytes
-  void put_uint(uint64_t value, size_t length);
-  void put_uint8(uint8_t value);
-  void put_uint16(uint16_t value) { this->put_uint(value, sizeof(uint16_t)); }
-  void put_uint24(uint32_t value) { this->put_uint(value, 3); }
-  void put_uint32(uint32_t value) { this->put_uint(value, sizeof(uint32_t)); }
-  void put_uint64(uint64_t value) { this->put_uint(value, sizeof(uint64_t)); }
-  // Signed versions of the put functions
-  void put_int8(int8_t value) { this->put_uint8(static_cast<uint8_t>(value)); }
-  void put_int16(int32_t value) { this->put_uint(static_cast<uint16_t>(value), sizeof(uint16_t)); }
-  void put_int24(int32_t value) { this->put_uint(static_cast<uint32_t>(value), 3); }
-  void put_int32(int32_t value) { this->put_uint(static_cast<uint32_t>(value), sizeof(uint32_t)); }
-  void put_int64(int64_t value) { this->put_uint(static_cast<uint64_t>(value), sizeof(uint64_t)); }
-  // Extra put functions
-  void put_float(float value);
-  void put_double(double value);
-  void put_bool(bool value) { this->put_uint8(value); }
-  void put_vector(const std::vector<uint8_t> &value);
-
-  inline size_t get_capacity() const { return this->data_.size(); }
-  inline size_t get_position() const { return this->position_; }
-  inline size_t get_limit() const { return this->limit_; }
-  inline size_t get_remaining() const { return this->get_limit() - this->get_position(); }
-  inline Endian get_endianness() const { return this->endianness_; }
-  inline void mark() { this->mark_ = this->position_; }
-  inline void big_endian() { this->endianness_ = BIG; }
-  inline void little_endian() { this->endianness_ = LITTLE; }
-  void set_limit(size_t limit);
-  void set_position(size_t position);
-  // set position to 0, limit to capacity.
-  void clear();
-  // set limit to current position, postition to zero. Used when swapping from write to read operations.
-  void flip();
-  // retrieve a pointer to the underlying data.
-  std::vector<uint8_t> get_data() { return this->data_; };
-  void rewind() { this->position_ = 0; }
-  void reset() { this->position_ = this->mark_; }
-
- protected:
-  ByteBuffer(std::vector<uint8_t> const &data) : data_(data), limit_(data.size()) {}
-  std::vector<uint8_t> data_;
-  Endian endianness_{LITTLE};
-  size_t position_{0};
-  size_t mark_{0};
-  size_t limit_{0};
-};
-
-}  // namespace esphome
diff --git a/tests/components/bytebuffer/common.yaml b/tests/components/bytebuffer/common.yaml
new file mode 100644
index 0000000000..177f487e1e
--- /dev/null
+++ b/tests/components/bytebuffer/common.yaml
@@ -0,0 +1,161 @@
+bytebuffer:
+
+esphome:
+  on_boot:
+    - lambda: |-
+        using namespace bytebuffer;
+        auto buf = ByteBuffer(16);
+        assert(buf.get_endianness() == LITTLE);
+        assert(buf.get_remaining() == 16);
+        buf.set_limit(10);
+        assert(buf.get_capacity() == 16);
+        buf.put_uint8(1);
+        assert(buf.get_remaining() == 9);
+        buf.put_uint16(0xABCD);
+        auto da = buf.get_data();
+        assert(buf.get_uint8(0) == 1);
+        auto x = buf.get_uint16(1);
+        assert(buf.get_uint16(1) == 0xABCD);
+        assert(buf.get_remaining() == 7);
+        buf.put_uint32(0x12345678UL);
+        assert(buf.get_uint32(3) == 0x12345678UL);
+        assert(buf.get_remaining() == 3);
+        assert(buf.get_data()[1] == 0xCD);
+        assert(buf.get_data()[2] == 0xAB);
+        assert(buf.get_data()[3] == 0x78);
+        assert(buf.get_data()[4] == 0x56);
+        assert(buf.get_data()[5] == 0x34);
+        assert(buf.get_data()[6] == 0x12);
+        buf.flip();
+        assert(buf.get_capacity() == 16);
+        assert(buf.get_uint32(3) == 0x12345678UL);
+        assert(buf.get_uint8(0) == 1);
+        assert(buf.get_uint16(1) == 0xABCD);
+        buf.put_uint16(0x1234, 1);
+        assert(buf.get_uint16(1) == 0x1234);
+        assert(buf.get_remaining() == 7);
+        assert(buf.get_uint8() == 1);
+        assert(buf.get_uint16() == 0x1234);
+        assert(buf.get_uint32() == 0x12345678ul);
+        assert(buf.get_remaining() == 0);
+        assert(buf.get_remaining() == 0);
+        buf.rewind();
+        buf.big_endian();
+        assert(buf.get_remaining() == 7);
+        assert(buf.get_uint8() == 1);
+        assert(buf.get_uint16() == 0x3412);
+        buf.mark();
+        assert(buf.get_uint32() == 0x78563412ul);
+        assert(buf.get_remaining() == 0);
+        buf.reset();
+        assert(buf.get_remaining() == 4);
+        assert(buf.get_uint32() == 0x78563412ul);
+        auto buf1 = ByteBuffer::wrap(buf.get_data().data(), buf.get_limit());
+        buf.clear();
+        assert(buf.get_position() == 0);
+        assert(buf.get_capacity() == 16);
+        assert(buf.get_limit() == 16);
+        assert(buf1.get_remaining() == 7);
+        assert(buf1.get_capacity() == 7);
+        buf1.set_position(3);
+        assert(buf1.get_uint32() == 0x12345678ul);
+        buf1.clear();
+        assert(buf1.get_limit() == 7);
+        assert(buf1.get_capacity() == 7);
+        assert(buf1.get_position() == 0);
+        float f = 1.2345;
+        buf1.put_float(f);
+        buf1.flip();
+        assert(buf1.get_remaining() == 4);
+        assert(buf1.get_float() == f);
+        buf1.clear();
+        buf1.put_uint16(-32760);
+        buf1.put_uint24(-302760);
+        buf1.flip();
+        assert(buf1.get_int16() == -32760);
+        assert(buf1.get_int24() == -302760);
+        uint8_t arr[4] = {0x10, 0x20, 0x30, 0x40};
+        buf1 = ByteBuffer::wrap(arr, 4);
+        assert(buf1.get_capacity() == 4);
+        assert(buf1.get_limit() == 4);
+        assert(buf1.get_position() == 0);
+        assert(buf1.get_uint32() == 0x40302010UL);
+        assert(buf1.get_position() == 4);
+        assert(buf1.get_remaining() == 0);
+        std::vector<uint8_t> vec{};
+        vec.push_back(0x10);
+        vec.push_back(0x20);
+        vec.push_back(0x30);
+        vec.push_back(0x40);
+        buf1 = ByteBuffer::wrap(vec);
+        assert(buf1.get_capacity() == 4);
+        assert(buf1.get_limit() == 4);
+        assert(buf1.get_position() == 0);
+        buf1.mark();
+        buf1.reset();
+        assert(buf1.get_uint32() == 0x40302010UL);
+        buf = ByteBuffer::wrap(true);
+        assert(buf.get_bool() == true);
+        buf = ByteBuffer::wrap((uint8_t)0xFE);
+        assert(buf.get_uint8() == 0xFE);
+        buf = ByteBuffer::wrap((uint16_t)0xA5A6, BIG);
+        assert(buf.get_remaining() == 2);
+        assert(buf.get_position() == 0);
+        assert(buf.get_capacity() == 2);
+        assert(buf.get_endianness() == BIG);
+        assert(buf.get_data()[0] == 0xA5);
+        assert(buf.get_uint16() == 0xA5A6);
+        buf.flip();
+        buf.little_endian();
+        assert(buf.get_uint16() == 0xA6A5);
+        buf = ByteBuffer::wrap(f, BIG);
+        assert(buf.get_float() == f);
+        double d = 1.2345678E7;
+        buf = ByteBuffer::wrap(d, BIG);
+        assert(buf.get_double() == d);
+        buf = ByteBuffer::wrap({1, 2, 3, 4}, BIG);
+        assert(buf.get_endianness() == BIG);
+        assert(buf.get_remaining() == 4);
+        assert(buf.get_data()[2] == 3);
+        buf.little_endian();
+        assert(buf.get_data()[2] == 3);
+        assert(buf.get_uint16() == 0x0201);
+        buf.big_endian();
+        assert(buf.get_uint16() == 0x0304);
+        buf.rewind();
+        vec = buf.get_vector(3);
+        assert(buf.get_remaining() == 1);
+        assert(vec[0] == 1);
+        assert(vec.size() == 3);
+        buf = ByteBuffer(10);
+        buf.put_vector(vec);
+        assert(buf.get_remaining() == 7);
+        buf.flip();
+        assert(buf.get_remaining() == 3);
+        assert(buf.get_uint24() == 0x030201);
+        buf = ByteBuffer(64);
+        buf.put_uint8(1, 1);
+        buf.put_uint16(16, 2);
+        buf.put_uint32(1232, 4);
+        buf.put_uint64(123432ul, 8);
+        buf.put_float(1.2f, 16);
+        buf.put_int24(0x678, 20);
+
+        assert(buf.get_uint8(1) == 1);
+        assert(buf.get<uint8_t>(1) == 1);
+        assert(buf.get_uint16(2) == 16);
+        assert(buf.get<uint16_t>(2) == 16);
+        assert(buf.get_uint32(4) == 1232);
+        assert(buf.get<uint32_t>(4) == 1232);
+        assert(buf.get_uint64(8) == 123432ul);
+        assert(buf.get<uint64_t>(8) == 123432ul);
+        assert(buf.get_float(16) == 1.2f);
+        assert(buf.get<float>(16) == 1.2f);
+        assert(buf.get_int24(20) == 0x678);
+        buf.clear();
+        buf.put(1.234, 10);
+        double dx = buf.get<double>(10);
+        assert(dx == 1.234);
+        buf.put((uint16_t)1, 10);
+        assert(buf.get_uint16(10) == 1);
+        ESP_LOGD("bytebuffer", "******************** All tests succeeded");
diff --git a/tests/components/bytebuffer/test.esp32-ard.yaml b/tests/components/bytebuffer/test.esp32-ard.yaml
new file mode 100644
index 0000000000..380ca87628
--- /dev/null
+++ b/tests/components/bytebuffer/test.esp32-ard.yaml
@@ -0,0 +1 @@
+!include common.yaml
diff --git a/tests/components/bytebuffer/test.esp32-c3-ard.yaml b/tests/components/bytebuffer/test.esp32-c3-ard.yaml
new file mode 100644
index 0000000000..380ca87628
--- /dev/null
+++ b/tests/components/bytebuffer/test.esp32-c3-ard.yaml
@@ -0,0 +1 @@
+!include common.yaml
diff --git a/tests/components/bytebuffer/test.esp32-c3-idf.yaml b/tests/components/bytebuffer/test.esp32-c3-idf.yaml
new file mode 100644
index 0000000000..380ca87628
--- /dev/null
+++ b/tests/components/bytebuffer/test.esp32-c3-idf.yaml
@@ -0,0 +1 @@
+!include common.yaml
diff --git a/tests/components/bytebuffer/test.esp32-idf.yaml b/tests/components/bytebuffer/test.esp32-idf.yaml
new file mode 100644
index 0000000000..380ca87628
--- /dev/null
+++ b/tests/components/bytebuffer/test.esp32-idf.yaml
@@ -0,0 +1 @@
+!include common.yaml
diff --git a/tests/components/bytebuffer/test.esp8266-ard.yaml b/tests/components/bytebuffer/test.esp8266-ard.yaml
new file mode 100644
index 0000000000..380ca87628
--- /dev/null
+++ b/tests/components/bytebuffer/test.esp8266-ard.yaml
@@ -0,0 +1 @@
+!include common.yaml
diff --git a/tests/components/bytebuffer/test.host.yaml b/tests/components/bytebuffer/test.host.yaml
new file mode 100644
index 0000000000..380ca87628
--- /dev/null
+++ b/tests/components/bytebuffer/test.host.yaml
@@ -0,0 +1 @@
+!include common.yaml
diff --git a/tests/components/bytebuffer/test.rp2040-ard.yaml b/tests/components/bytebuffer/test.rp2040-ard.yaml
new file mode 100644
index 0000000000..380ca87628
--- /dev/null
+++ b/tests/components/bytebuffer/test.rp2040-ard.yaml
@@ -0,0 +1 @@
+!include common.yaml
diff --git a/tests/components/lvgl/lvgl-package.yaml b/tests/components/lvgl/lvgl-package.yaml
index 4962a71596..9bfbb5fc95 100644
--- a/tests/components/lvgl/lvgl-package.yaml
+++ b/tests/components/lvgl/lvgl-package.yaml
@@ -458,6 +458,18 @@ lvgl:
 
     - id: page2
       widgets:
+        - qrcode:
+            id: lv_qr
+            align: left_mid
+            size: 100
+            light_color: whitesmoke
+            dark_color: steelblue
+            text: esphome.io
+            on_click:
+              lvgl.qrcode.update:
+                id: lv_qr
+                text: homeassistant.io
+
         - slider:
             min_value: 0
             max_value: 255