diff --git a/terminal_s/terminal.py b/terminal_s/terminal.py
index 8e38b91..2018dd3 100644
--- a/terminal_s/terminal.py
+++ b/terminal_s/terminal.py
@@ -1,8 +1,6 @@
 """
 Terminal for serial port
-
 Requirement:
-
     + pyserial
     + colorama
     + py-getch
@@ -20,8 +18,18 @@
 import colorama
 import click
 import serial
+import datetime
 from serial.tools import list_ports
 
+# define our clear function
+def screen_clear():
+    # for windows
+    if os.name == 'nt':
+        os.system('cls')
+    # for mac and linux(here, os.name is 'posix')
+    else:
+        os.system('clear')
+
 
 def run(port, baudrate, parity='N', stopbits=1):
     try:
@@ -35,9 +43,16 @@ def run(port, baudrate, parity='N', stopbits=1):
         print('--- Failed to open {} ---'.format(port))
         return 0
 
-    print('--- {} is connected. Press Ctrl+] to quit ---'.format(port))
+    print('--- {} is connected.---'.format(port))
+    print('---Press Ctrl+] to quit---')
+    print('---Press Ctrl+t to show or hide timestamp---')
+    print('---Press Ctrl+l clear screen---')
     queue = deque()
+    timestamp_en = bool()
+    timestamp_input_en = bool()
     def read_input():
+        nonlocal timestamp_en
+        nonlocal timestamp_input_en
         if os.name == 'nt':
             from msvcrt import getch
         else:
@@ -53,15 +68,37 @@ def read_input():
             # print(ch)
             if ch == b'\x1d':                   # 'ctrl + ]' to quit
                 break
-            if ch == b'\x00' or ch == b'\xe0':  # arrow keys' escape sequences
+            if ch == b'\x0c':
+                screen_clear()                  # 'ctrl + l' to clear screen
+            if ch == b'\x14':                   # 'ctrl + t' to change timestamp status
+                timestamp_en = bool(1-timestamp_en)
+            if ch == b'\x00' or ch == b'\xe0':  # arrow keys' escape sequences for windows
                 ch2 = getch()
                 esc_dict = { b'H': b'A', b'P': b'B', b'M': b'C', b'K': b'D', b'G': b'H', b'O': b'F' }
                 if ch2 in esc_dict:
                     queue.append(b'\x1b[' + esc_dict[ch2])
                 else:
                     queue.append(ch + ch2)
-            else:  
+                timestamp_input_en = False
+            else:
                 queue.append(ch)
+                if ch == b' ' or ch == b'\n' or ch == b'\r':
+                    timestamp_input_en = False
+                elif ch == b'\x1b':            # arrow keys' escape sequences for linux
+                    ch2 = getch()
+                    if ch2 == b'[':
+                        ch2 = getch()
+                        esc_dict = { b'A': b'A', b'B': b'B', b'C': b'C', b'D': b'D', b'H': b'H', b'F': b'F' }
+                        if ch2 in esc_dict:
+                            queue.append(b'[' + esc_dict[ch2])
+                        else:
+                            queue.append(b'[' + ch2)
+                    else:
+                        queue.append(ch2)
+                    timestamp_input_en = False
+                else:
+                    timestamp_input_en = True
+                # print(queue)
 
         if os.name != 'nt':
             termios.tcsetattr(stdin_fd, termios.TCSADRAIN, tty_attr)
@@ -73,12 +110,27 @@ def read_input():
     while thread.is_alive():
         try:
             length = len(queue)
+            queue_bak = queue.copy()
             if length > 0:
                 device.write(b''.join(queue.popleft() for _ in range(length)))
 
             line = device.readline()
             if line:
-                print(line.decode(errors='replace'), end='', flush=True)
+                if (line in queue_bak and len(line) == len(queue_bak)) or (timestamp_en == False or timestamp_input_en == False) or (line == b'\r' or line == b'\r\n'):
+                    print(line.decode(errors='replace'), end='', flush=True)
+                    if timestamp_en == True:
+                        timestamp_input_en = True
+                else:
+                    time_now = datetime.datetime.now().strftime('%H:%M:%S.%f')
+                    print('\033[1;35m ' + time_now + '\033[0m ' + line.decode(errors='replace'), end='', flush=True)
+                if (b'login:' in line):
+                    usrname = b'root\r\n';
+                    #print(usrname)
+                    device.write(usrname)
+                if (b'Password:' in line):
+                    password = b'CherryYoudao\r\n';
+                    #print(password)
+                    device.write(password)
         except IOError:
             print('--- {} is disconnected ---'.format(port))
             break
@@ -113,7 +165,7 @@ def main(port, baudrate, parity, stopbits, l):
         else:
             print('--- Available Ports ----')
             for i, v in enumerate(ports):
-                print('---  {}: {} {}'.format(i, v[0], v[2]))
+                print('---  {}: {} {}'.format(i, v[0], v[1]))
             if l:
                 return
             raw = input('--- Select port index: ')
@@ -127,4 +179,4 @@ def main(port, baudrate, parity, stopbits, l):
         pass
 
 if __name__ == "__main__":
-    main()
+    main()
\ No newline at end of file