diff --git a/components/panasonic_heatpump/panasonic_heatpump.cpp b/components/panasonic_heatpump/panasonic_heatpump.cpp
index 4784c34..47ec984 100644
--- a/components/panasonic_heatpump/panasonic_heatpump.cpp
+++ b/components/panasonic_heatpump/panasonic_heatpump.cpp
@@ -107,6 +107,7 @@ namespace esphome
       {
         // Probably not necessary but CZ-TAW1 sends this query on boot
         this->log_uart_hex(UART_LOG_TX, PanasonicCommand::InitialRequest, INIT_REQUEST_SIZE, ',');
+
         this->write_array(PanasonicCommand::InitialRequest, INIT_REQUEST_SIZE);
         this->flush();
       }
@@ -202,10 +203,9 @@ namespace esphome
         logStr += buffer;
       }
 
-      size_t chunkSize = 150;
-      for (size_t i = 0; i < logStr.length(); i += chunkSize)
+      for (size_t i = 0; i < logStr.length(); i += UART_LOG_CHUNK_SIZE)
       {
-        ESP_LOGI(TAG, "%s %s", msgDir.c_str(), logStr.substr(i, chunkSize).c_str());
+        ESP_LOGI(TAG, "%s %s", msgDir.c_str(), logStr.substr(i, UART_LOG_CHUNK_SIZE).c_str());
         delay(10);
       }
     }
diff --git a/components/panasonic_heatpump/panasonic_heatpump.h b/components/panasonic_heatpump/panasonic_heatpump.h
index 3fa4f8c..ea3bf10 100644
--- a/components/panasonic_heatpump/panasonic_heatpump.h
+++ b/components/panasonic_heatpump/panasonic_heatpump.h
@@ -28,6 +28,8 @@
 #include <tuple>
 #include <string>
 
+#define UART_LOG_CHUNK_SIZE 153
+
 
 namespace esphome
 {
@@ -264,13 +266,14 @@ namespace esphome
       // option functions
       void set_uart_client(uart::UARTComponent* uart) { this->uart_client_ = uart; }
       void set_log_uart_msg(bool enable) { this->log_uart_msg_ = enable; }
+      // uart message variables to use in lambda functions
+      std::vector<uint8_t> response_message_;
 
     protected:
       // options variables
       uart::UARTComponent* uart_client_ { nullptr };
       bool log_uart_msg_ { false };
       // uart message variables
-      std::vector<uint8_t> response_message_;
       std::vector<uint8_t> request_message_;
       std::vector<uint8_t> command_message_;
       uint8_t response_payload_length_;