diff --git a/boot/zephyr/serial_adapter.c b/boot/zephyr/serial_adapter.c
new file mode 100644
index 0000000..70d352d
--- /dev/null
+++ b/boot/zephyr/serial_adapter.c
@@ -0,0 +1,193 @@
+/*
+ * Copyright (c) 2017 Nordic Semiconductor ASA
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdio.h>
+#include <uart.h>
+#include <assert.h>
+#include <string.h>
+#include <zephyr.h>
+
+#ifdef CONFIG_UART_CONSOLE
+#error Zephyr UART console must been disabled if serial_adapter module is used.
+#endif
+
+/** @brief Console input representation
+ *
+ * This struct is used to represent an input line from a serial interface.
+ */
+struct line_input {
+    /** FIFO uses first 4 bytes itself, reserve space */
+    int _unused;
+
+    int len;
+    /** Buffer where the input line is recorded */
+    char line[CONFIG_BOOT_MAX_LINE_INPUT_LEN];
+};
+
+static struct device *uart_dev;
+static struct line_input line_bufs[2];
+
+static K_FIFO_DEFINE(free_queue);
+static K_FIFO_DEFINE(used_queue);
+
+static struct k_fifo *avail_queue;
+static struct k_fifo *lines_queue;
+static u16_t cur;
+
+static int boot_uart_fifo_getline(char **line);
+static int boot_uart_fifo_init(void);
+
+int
+console_out(int c)
+{
+    if ('\n' == c) {
+        uart_poll_out(uart_dev, '\r');
+    }
+    uart_poll_out(uart_dev, c);
+
+    return c;
+}
+
+void
+console_write(const char *str, int cnt)
+{
+    int i;
+
+    for (i = 0; i < cnt; i++) {
+        if (console_out((int)str[i]) == EOF) {
+            break;
+        }
+    }
+}
+
+int
+console_read(char *str, int str_size, int *newline)
+{
+    char * line;
+    int len;
+
+    len = boot_uart_fifo_getline(&line);
+
+    if (line == NULL) {
+        *newline = 0;
+        return 0;
+    }
+
+    if (len > str_size - 1) {
+        len = str_size - 1;
+    }
+
+    memcpy(str, line, len);
+    str[len] = '\0';
+    *newline = 1;
+    return len + 1;
+}
+
+int
+boot_console_init(void)
+{
+    int i;
+
+    for (i = 0; i < ARRAY_SIZE(line_bufs); i++) {
+        k_fifo_put(&free_queue, &line_bufs[i]);
+    }
+
+    /* Zephyr UART handler takes an empty buffer from free_queue,
+     * stores UART input in it until EOL, and then puts it into
+     * used_queue.
+     */
+    avail_queue = &free_queue;
+    lines_queue = &used_queue;
+
+    return boot_uart_fifo_init();
+}
+
+static void
+boot_uart_fifo_callback(struct device *dev)
+{
+    static struct line_input *cmd;
+    u8_t byte;
+    int rx;
+
+    while (uart_irq_update(uart_dev) &&
+           uart_irq_rx_ready(uart_dev)) {
+
+        rx = uart_fifo_read(uart_dev, &byte, 1);
+
+        if (!cmd) {
+            cmd = k_fifo_get(avail_queue, K_NO_WAIT);
+            if (!cmd) {
+                return;
+            }
+        }
+
+        if (cur < CONFIG_BOOT_MAX_LINE_INPUT_LEN) {
+            cmd->line[cur++] = byte;
+        }
+
+        if (byte ==  '\n') {
+            cmd->len = cur;
+            k_fifo_put(lines_queue, cmd);
+            cur = 0;
+        }
+
+    }
+}
+
+static int
+boot_uart_fifo_getline(char **line)
+{
+    static struct line_input *cmd;
+
+    /* Recycle cmd buffer returned previous time */
+    if (cmd != NULL) {
+        k_fifo_put(&free_queue, cmd);
+    }
+
+    cmd = k_fifo_get(&used_queue, K_NO_WAIT);
+
+    if (cmd == NULL) {
+        *line = NULL;
+        return 0;
+    }
+
+    *line = cmd->line;
+    return cmd->len;
+}
+
+static int
+boot_uart_fifo_init(void)
+{
+    uart_dev = device_get_binding(CONFIG_UART_CONSOLE_ON_DEV_NAME);
+    u8_t c;
+
+    if (!uart_dev) {
+        return (-1);
+    }
+
+    uart_irq_callback_set(uart_dev, boot_uart_fifo_callback);
+
+    /* Drain the fifo */
+    while (uart_irq_rx_ready(uart_dev)) {
+        uart_fifo_read(uart_dev, &c, 1);
+    }
+
+    cur = 0;
+
+    uart_irq_rx_enable(uart_dev);
+
+    return 0;
+}