boards/shields/sparkfun_sara_r4/boards/nrf52840_pca10056.overlay - third_party/github/zephyrproject-rtos/zephyr - Git at Google

 /*
  * Copyright (c) 2019 Foundries.io
  *
  * SPDX-License-Identifier: Apache-2.0
  */

 &arduino_serial {
 	tx-pin = <34>;
 	rx-pin = <33>;
 };
	/*
	* Copyright (c) 2019 Foundries.io
	*
	* SPDX-License-Identifier: Apache-2.0
	*/

	&arduino_serial {
	tx-pin = <34>;
	rx-pin = <33>;
	};