diff --git a/include/bluetooth/hci.h b/include/bluetooth/hci.h
index a9da06d9944..6db6cf12003 100644
--- a/include/bluetooth/hci.h
+++ b/include/bluetooth/hci.h
@@ -187,6 +187,8 @@ struct bt_hci_cmd_hdr {
 						BT_LE_FEAT_BIT_PER_ADV)
 #define BT_FEAT_LE_CONNECTIONLESS_CTE_TX(feat)  BT_LE_FEAT_TEST(feat, \
 						BT_LE_FEAT_BIT_CONNECTIONLESS_CTE_TX)
+#define BT_FEAT_LE_ANT_SWITCH_TX_AOD(feat)	BT_LE_FEAT_TEST(feat, \
+						BT_LE_FEAT_BIT_ANT_SWITCH_TX_AOD)
 #define BT_FEAT_LE_PAST_SEND(feat)              BT_LE_FEAT_TEST(feat, \
 						BT_LE_FEAT_BIT_PAST_SEND)
 #define BT_FEAT_LE_PAST_RECV(feat)              BT_LE_FEAT_TEST(feat, \
diff --git a/subsys/bluetooth/host/direction.c b/subsys/bluetooth/host/direction.c
index b317b43015c..ae3884abbb4 100644
--- a/subsys/bluetooth/host/direction.c
+++ b/subsys/bluetooth/host/direction.c
@@ -11,7 +11,9 @@
 #include <bluetooth/conn.h>
 #include <sys/byteorder.h>
 
+#include "hci_core.h"
 #include "conn_internal.h"
+#include "direction.h"
 #include "direction_internal.h"
 
 #define BT_DBG_ENABLED IS_ENABLED(CONFIG_BT_DEBUG_DF)
@@ -41,6 +43,71 @@ static struct bt_le_df_ant_info df_ant_info;
 #define DF_AOA_RX_1US_SUPPORT(supp)             (DF_SUPP_TEST(supp, \
 						BT_HCI_LE_1US_AOA_RX))
 
+static int hci_df_set_cl_cte_tx_params(const struct bt_le_ext_adv *adv,
+				const struct bt_le_df_adv_cte_tx_params *params)
+{
+	struct bt_hci_cp_le_set_cl_cte_tx_params *cp;
+	struct net_buf *buf;
+
+	/* If AoD is not enabled, ant_ids are ignored by controller:
+	 * BT Core spec 5.2 Vol 4, Part E sec. 7.8.80.
+	 */
+	if (params->cte_type == BT_HCI_LE_AOD_CTE_1US ||
+	    params->cte_type == BT_HCI_LE_AOD_CTE_2US) {
+
+		if (!BT_FEAT_LE_ANT_SWITCH_TX_AOD(bt_dev.le.features)) {
+			return -EINVAL;
+		}
+
+		if (params->cte_type == BT_HCI_LE_AOD_CTE_1US &&
+		    !DF_AOD_TX_1US_SUPPORT(df_ant_info.switch_sample_rates)) {
+			return -EINVAL;
+		}
+
+		if (params->num_ant_ids < BT_HCI_LE_SWITCH_PATTERN_LEN_MIN ||
+		    params->num_ant_ids > BT_HCI_LE_SWITCH_PATTERN_LEN_MAX ||
+		    !params->ant_ids) {
+			return -EINVAL;
+		}
+	} else if (params->cte_type != BT_HCI_LE_AOA_CTE) {
+		return -EINVAL;
+	}
+
+	if (params->cte_len < BT_HCI_LE_CTE_LEN_MIN ||
+	    params->cte_len > BT_HCI_LE_CTE_LEN_MAX) {
+		return -EINVAL;
+	}
+
+	if (params->cte_count < BT_HCI_LE_CTE_COUNT_MIN ||
+	    params->cte_count > BT_HCI_LE_CTE_COUNT_MAX) {
+		return -EINVAL;
+	}
+
+	buf = bt_hci_cmd_create(BT_HCI_OP_LE_SET_CL_CTE_TX_PARAMS,
+				sizeof(*cp) + params->num_ant_ids);
+	if (!buf) {
+		return -ENOBUFS;
+	}
+
+	cp = net_buf_add(buf, sizeof(*cp));
+	cp->handle = adv->handle;
+	cp->cte_len = params->cte_len;
+	cp->cte_type = params->cte_type;
+	cp->cte_count = params->cte_count;
+
+	if (params->num_ant_ids) {
+		uint8_t *dest_ant_ids = net_buf_add(buf, params->num_ant_ids);
+
+		memcpy(dest_ant_ids, params->ant_ids, params->num_ant_ids);
+		cp->switch_pattern_len = params->num_ant_ids;
+	} else {
+		cp->switch_pattern_len = 0;
+	}
+
+	return bt_hci_cmd_send_sync(BT_HCI_OP_LE_SET_CL_CTE_TX_PARAMS,
+				    buf, NULL);
+}
+
 /* @brief Function provides information about DF antennae numer and
  *	  controller capabilities related with Constant Tone Extension.
  *
diff --git a/subsys/bluetooth/host/direction.h b/subsys/bluetooth/host/direction.h
new file mode 100644
index 00000000000..9637c417178
--- /dev/null
+++ b/subsys/bluetooth/host/direction.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2020 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef ZEPHYR_SUBSYS_BLUETOOTH_HOST_DF_H_
+#define ZEPHYR_SUBSYS_BLUETOOTH_HOST_DF_H_
+
+/* @brief Optional switching and sampling rates for Angle of Departure
+ * and Angle or Arrival modes.
+ */
+enum bt_df_opt_swich_sample_rates {
+	/* Support Angle of Departure 1us switching TX */
+	DF_AOD_1US_SWITCH_TX_SUPP = BIT(0),
+	/* Support Angle of departure 1us sampling RX */
+	DF_AOD_1US_SAMPL_RX_SUPP = BIT(1),
+	/* Support Angle of Arrival 1us switching and sampling RX */
+	DF_AOA_1US_SWITCH_SAMPL_RX_SUPP  = BIT(2),
+};
+
+/* @brief Constant Tone Extension parameters for connectionless
+ * transmission.
+ *
+ * The structure holds information required to setup CTE transmission
+ * in periodic advertising.
+ */
+struct bt_le_df_adv_cte_tx_params {
+	/* Length of CTE in 8us units */
+	uint8_t  cte_len;
+	/* CTE Type: AoA, AoD 1us slots, AoD 2us slots */
+	uint8_t  cte_type;
+	/* Number of CTE to transmit in each periodic adv interval */
+	uint8_t  cte_count;
+	/* Number of Antenna IDs in the switch pattern */
+	uint8_t  num_ant_ids;
+	/* List of antenna IDs in the pattern */
+	uint8_t  *ant_ids;
+};
+#endif /* ZEPHYR_SUBSYS_BLUETOOTH_HOST_DF_H_ */