Add static keywords
#if !__DOXYGEN__
+volatile uint8_t esp_ll_win32_driver_ignore_data;
static uint8_t initialized = 0;
+static HANDLE thread_handle;
+static volatile HANDLE com_port; /*!< COM port handle */
+static uint8_t data_buffer[0x1000]; /*!< Received data array */
-DWORD thread_id;
-HANDLE thread_handle;
static void uart_thread(void* param);
-volatile HANDLE com_port; /*!< COM port handle */
-uint8_t data_buffer[0x1000]; /*!< Received data array */
-volatile uint8_t esp_ll_win32_driver_ignore_data;
/**
* \brief Send data to ESP device, function called from ESP stack when we have data to send
