diff --git a/components/panasonic_heatpump/helpers.h b/components/panasonic_heatpump/helpers.h
index 4174423..af71f9c 100644
--- a/components/panasonic_heatpump/helpers.h
+++ b/components/panasonic_heatpump/helpers.h
@@ -20,6 +20,8 @@ class PanasonicHelpers {
  public:
   static void log_uart_hex(UartLogDirection direction, const std::vector<uint8_t>& data, const char separator);
   static void log_uart_hex(UartLogDirection direction, const uint8_t* data, const size_t length, const char separator);
+  static std::string byte_array_to_hex_string(const std::vector<uint8_t>& data, const char separator);
+  static std::string byte_array_to_hex_string(const uint8_t* data, const size_t length, const char separator);
 };
 }  // namespace panasonic_heatpump
 }  // namespace esphome