diff --git a/esphome/core/bytebuffer.cpp b/esphome/core/bytebuffer.cpp
index 75806fad32..9dd32bf87a 100644
--- a/esphome/core/bytebuffer.cpp
+++ b/esphome/core/bytebuffer.cpp
@@ -7,9 +7,9 @@
 
 namespace esphome {
 
-ByteBuffer ByteBuffer::wrap(const uint8_t *value, size_t length, Endian endianness) {
+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(value, value + length);
+  std::vector<uint8_t> data(ptr, ptr + len);
   ByteBuffer buffer = {data};
   buffer.endianness_ = endianness;
   return buffer;
@@ -74,32 +74,16 @@ void ByteBuffer::set_position(size_t position) {
 void ByteBuffer::clear() {
   this->limit_ = this->get_capacity();
   this->position_ = 0;
-  this->used_space_ = 0;
 }
 void ByteBuffer::flip() {
-  this->limit_ = this->used_space_;
+  this->limit_ = this->position_;
   this->position_ = 0;
 }
 
-bool ByteBuffer::is_changed() {
-  bool changed = this->is_changed_;
-  this->is_changed_ = false;
-  return changed;
-}
-
-void ByteBuffer::update_used_space_() {
-  this->is_changed_ = true;
-  if (this->used_space_ < this->position_) {
-    this->resize();
-  }
-}
-
 /// Getters
 uint8_t ByteBuffer::get_uint8() {
   assert(this->get_remaining() >= 1);
-  this->position_++;
-  this->update_used_space_();
-  return this->data_[this->position_ - 1];
+  return this->data_[this->position_++];
 }
 uint64_t ByteBuffer::get_uint(size_t length) {
   assert(this->get_remaining() >= length);
@@ -117,7 +101,6 @@ uint64_t ByteBuffer::get_uint(size_t length) {
       value |= this->data_[this->position_++];
     }
   }
-  this->update_used_space_();
   return value;
 }
 
@@ -141,23 +124,13 @@ 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;
-  this->update_used_space_();
   return {start, start + length};
 }
-void ByteBuffer::get_bytes(uint8_t *value, size_t length) {
-  size_t index = 0;
-  assert(this->get_remaining() >= length);
-  while (length-- != 0) {
-    *(value + index++) = this->data_[this->position_++];
-  }
-  this->update_used_space_();
-}
 
 /// Putters
 void ByteBuffer::put_uint8(uint8_t value) {
   assert(this->get_remaining() >= 1);
   this->data_[this->position_++] = value;
-  this->update_used_space_();
 }
 
 void ByteBuffer::put_uint(uint64_t value, size_t length) {
@@ -175,7 +148,6 @@ void ByteBuffer::put_uint(uint64_t value, size_t length) {
       value >>= 8;
     }
   }
-  this->update_used_space_();
 }
 void ByteBuffer::put_float(float value) {
   static_assert(sizeof(float) == sizeof(uint32_t), "Float sizes other than 32 bit not supported");
@@ -191,15 +163,5 @@ 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();
-  this->update_used_space_();
 }
-void ByteBuffer::put_bytes(const uint8_t *value, size_t length) {
-  assert(this->get_remaining() >= length);
-  auto index = 0;
-  while (length-- != 0) {
-    this->data_[this->position_++] = static_cast<uint8_t>(*(value + index++));
-  }
-  this->update_used_space_();
-}
-
 }  // namespace esphome
diff --git a/esphome/core/bytebuffer.h b/esphome/core/bytebuffer.h
index 50dd10250d..d44d01f275 100644
--- a/esphome/core/bytebuffer.h
+++ b/esphome/core/bytebuffer.h
@@ -30,13 +30,10 @@ enum Endian { LITTLE, BIG };
  * data from a buffer after it has been written.
  *
  */
-
-class ByteBuffer;
 class ByteBuffer {
  public:
   // Default constructor (compatibility with TEMPLATABLE_VALUE)
   ByteBuffer() : ByteBuffer(std::vector<uint8_t>()) {}
-  ~ByteBuffer() = default;
   /**
    * Create a new Bytebuffer with the given capacity
    */
@@ -49,7 +46,7 @@ class ByteBuffer {
   /**
    * Wrap an existing array in a ByteBuffer. Note that this will create a copy of the data.
    */
-  static ByteBuffer wrap(const uint8_t *value, size_t length, Endian endianness = LITTLE);
+  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);
@@ -95,7 +92,6 @@ class ByteBuffer {
   bool get_bool() { return this->get_uint8(); }
   // Get vector of bytes, increment by length
   std::vector<uint8_t> get_vector(size_t length);
-  void get_bytes(uint8_t *value, size_t length);
 
   // Put values into the buffer, increment the position accordingly
   // put any integral value, length represents the number of bytes
@@ -116,13 +112,11 @@ class ByteBuffer {
   void put_double(double value);
   void put_bool(bool value) { this->put_uint8(value); }
   void put_vector(const std::vector<uint8_t> &value);
-  void put_bytes(const uint8_t *value, size_t length);
 
   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 size_t get_used_space() const { return this->used_space_; }
   inline Endian get_endianness() const { return this->endianness_; }
   inline void mark() { this->mark_ = this->position_; }
   inline void big_endian() { this->endianness_ = BIG; }
@@ -137,26 +131,14 @@ class ByteBuffer {
   std::vector<uint8_t> get_data() { return this->data_; };
   void rewind() { this->position_ = 0; }
   void reset() { this->position_ = this->mark_; }
-  void resize() { this->used_space_ = this->position_; }
-
-  bool is_changed();
-
-  ByteBuffer &operator[](size_t idx) {
-    this->set_position(idx);
-    return *this;
-  }
 
  protected:
   ByteBuffer(std::vector<uint8_t> const &data) : data_(data), limit_(data.size()) {}
-  void update_used_space_();
-
   std::vector<uint8_t> data_;
   Endian endianness_{LITTLE};
   size_t position_{0};
   size_t mark_{0};
   size_t limit_{0};
-  size_t used_space_{0};
-  bool is_changed_{false};
 };
 
 }  // namespace esphome