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diff --git a/watch-library/shared/watch/watch_uart.h b/watch-library/shared/watch/watch_uart.h
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+++ b/watch-library/shared/watch/watch_uart.h
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+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 Joey Castillo
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _WATCH_UART_H_INCLUDED
+#define _WATCH_UART_H_INCLUDED
+////< @file watch_uart.h
+
+#include "watch.h"
+
+/** @addtogroup debug Debug UART
+  * @brief This section covers functions related to the debug UART, available on
+  *        pin D1 of the 9-pin connector.
+  * @warning These functions were used early on in development, before the TinyUSB
+  *          CDC was implemented. You can now print debug messages to the USB console
+  *          using printf, rendering this bit irrelevant. These methods will likely
+  *          be refactored out in the future, in favor of a more full-featured UART
+  *          on the nine-pin connector.
+  **/
+/// @{
+/** @brief Initializes the debug UART.
+  * @param baud The baud rate
+  */
+__attribute__((deprecated("Use printf to log debug messages over USB.")))
+void watch_enable_debug_uart(uint32_t baud);
+
+/** @brief Outputs a single character on the debug UART.
+  * @param c The character you wish to output.
+  */
+__attribute__((deprecated("Use printf to log debug messages over USB.")))
+void watch_debug_putc(char c);
+
+/** @brief Outputs a string on the debug UART.
+  * @param s A null-terminated string.
+  */
+__attribute__((deprecated("Use printf to log debug messages over USB.")))
+void watch_debug_puts(char *s);
+/// @}
+#endif