diff --git a/.gitignore b/.gitignore
index 4efcc1b..be979e4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 work/
-__pycache__/
\ No newline at end of file
+__pycache__/
+history/
\ No newline at end of file
diff --git a/bin_to_hex.py b/bin_to_hex.py
index 463f127..87a5a19 100644
--- a/bin_to_hex.py
+++ b/bin_to_hex.py
@@ -254,6 +254,7 @@ def bin_to_hex_file(bin_file_name:str,hex_file_name:str,info_file_name:str=None)
   else:
     info=load_flash_info(info_file_name)
   text=bin_to_hex2(bin)
+  print(f"write to file {hex_file_name}")
   with open(hex_file_name,mode='w+',encoding="utf-8") as f:
     f.write(text)
 
diff --git a/bootram_kl3_build.bin b/bootram_kl3_build.bin
new file mode 100644
index 0000000..b8d8a69
Binary files /dev/null and b/bootram_kl3_build.bin differ
diff --git a/kl3_ram_build.bin b/kl3_ram_build.bin
new file mode 100644
index 0000000..44f4bbc
Binary files /dev/null and b/kl3_ram_build.bin differ
diff --git a/kunlun.py b/kunlun.py
index dc83e62..62f9196 100644
--- a/kunlun.py
+++ b/kunlun.py
@@ -24,7 +24,6 @@ def init_send(s_port:serial.Serial, send_str):
         bytes2read = s_port.in_waiting
         tmp = s_port.read(bytes2read)
         s_info += tmp
-        # m_ram = re.search("Recieving RAM-IMAGE in xmodem : C", s_info.decode("utf-8"))
         if(s_info.find(b"Recieving RAM-IMAGE in xmodem : C")>=0):
             m_ram=True
         else:
@@ -45,21 +44,22 @@ def burn_ram_bin(x_modem:xmodem.XMODEM, r_file):
         myprint("Cannot load file, please check the file path and retry. Press <enter> to exit")
         sys.exit()
 
-    xmodem_send = x_modem.send(stream, callback=status_update_0)
+    xmodem_send = x_modem.send(stream, callback=download_callback)
     etime = datetime.datetime.now()
     trans_time_0 = (etime - stime).seconds
-    myprint ("\nTransferring ram.bin result: %s, consuming time: %s s \n" % (xmodem_send, trans_time_0))
+    myprint ("\nTransferring %s result: %s, consuming time: %s s \n" % (r_file, xmodem_send, trans_time_0))
 
 def burn_flash_bin(s_port:serial.Serial, x_modem:xmodem.XMODEM, f_file):
     global trans_time_1
     s_info = bytearray()
     while True:
-        s_info += s_port.read(1)
-        myprint(f"recv:{s_info.hex(' ')}")
         bytes2read = s_port.in_waiting
         tmp = s_port.read(bytes2read)
+        if(len(tmp)==0):
+            continue
+        print_device_str(tmp)
         s_info += tmp
-        if(s_info.find(b'C')>=0):
+        if(s_info.find(b'C')>=0 and bytes2read==1):
             m_flash=True
         else:
             m_flash=False
@@ -69,7 +69,6 @@ def burn_flash_bin(s_port:serial.Serial, x_modem:xmodem.XMODEM, f_file):
             m_done=False
 
         if m_flash:
-            # myprint m_flash.group(0)
             myprint (r"Recieving FLASH-IMAGE in xmodem : C")
             s_info = bytearray()
             stime = datetime.datetime.now()
@@ -80,20 +79,37 @@ def burn_flash_bin(s_port:serial.Serial, x_modem:xmodem.XMODEM, f_file):
                 myprint("Cannot load file, please check the file path and retry. Press <enter> to exit")
                 sys.exit()
 
-            xmodem_send = x_modem.send(stream, quiet=True, callback=status_update_1)
+            xmodem_send = x_modem.send(stream, quiet=True, callback=download_callback)
             etime = datetime.datetime.now()
             trans_time_1 = (etime - stime).seconds
-            myprint ("\nTransferring iot_flash.bin result: %s, consuming time: %d s \n" % (xmodem_send, trans_time_1))
+            myprint ("\nTransferring %s result: %s, consuming time: %d s \n" % (f_file,xmodem_send, trans_time_1))
         elif m_done:
-            myprint (m_done.group(0))
+            myprint("Update done.")
             break
         else:
             pass
 
 
 def upload_callback(total_packets, success_count, error_count, packet_size):
-    # callback(total_packets, success_count, error_count, packet_size)
-    myprint("upload:",total_packets, success_count, error_count, packet_size)
+    if total_packets % 10 == 0:
+        sys.stdout.write('.')
+        sys.stdout.flush()
+
+
+def download_callback(total_packets, success_count, error_count):
+    if total_packets % 10 == 0:
+        sys.stdout.write('.')
+        sys.stdout.flush()
+
+# 打印串口收到的字符
+def print_device_str(data:bytearray):
+    data:list[bytearray]=data.split(b"\r\n")
+    for item in data:
+        try:
+            d=item.decode('utf-8')
+            myprint(d.strip())
+        except Exception as e:
+            myprint(f" {item.hex()}")
 
 # 上传固件
 def upload_bin(x_modem:xmodem.XMODEM, w_file):
@@ -116,28 +132,14 @@ def upload_bin(x_modem:xmodem.XMODEM, w_file):
 
 def getc(size, timeout=1):
     data=ser.read(size)
-    # myprint("getc:",data.hex(' '))
     return data or None
 
 
 def putc(data, timeout=1):
-    # myprint("putc:",data.hex(' '))
     ser.write(data)
     time.sleep(0.03)
 
 
-def status_update_0(total_packets, success_count, error_count):
-    myprint ("total_packets: %s, success_count: %s, error_count: %d" % (total_packets, success_count, error_count))
-    # if total_packets % 10 == 0:
-    #     myprint ('.'),
-
-
-def status_update_1(total_packets, success_count, error_count):
-    myprint ("total_packets: %s, success_count: %s, error_count: %d" % (total_packets, success_count, error_count))
-    # if total_packets % 50 == 0:
-    #     myprint ('.'),
-
-
 
 
 
@@ -173,6 +175,52 @@ def calc_flash_info_name():
     return os.path.join(_work_dir,name)
 
 
+
+
+# 上传固件
+def upload_fun():
+    # 显示flash信息
+    ser.write(b"f i\n")
+    time.sleep(0.5)
+    ser_read_data=ser.read(4096)
+    print_device_str(ser_read_data)
+    with open(calc_flash_info_name(),mode='w+',encoding='utf-8') as f:
+        f.writelines(ser_read_data.decode('utf-8').split('\r\n'))
+    # 显示image信息
+    ser.write(b"f s\n")
+    time.sleep(0.5)
+    ser_read_data=ser.read(4096)
+    print_device_str(ser_read_data)
+    with open(calc_flash_info_name(),mode='a+',encoding='utf-8') as f:
+        f.writelines(ser_read_data.decode('utf-8').split('\r\n'))
+    # 上传整个镜像
+    ser.write(b"fw u d all\n")
+    time.sleep(0.5)
+    myprint(ser.read(4096).decode('utf-8'))
+    upload_bin(modem,calc_upload_name())
+
+    myprint ("Total transmission time: %s s" % str(trans_time_0+trans_time_1))
+    myprint("Start transform bin to hex.")
+    bin_to_hex_file(calc_upload_name(), calc_hex_name(),calc_flash_info_name())
+    myprint("Transform to hex end.")
+
+
+# 烧录固件
+def burn_fun():
+    time.sleep(3)
+    ser_read_data=ser.read(4096)
+    print_device_str(ser_read_data)
+    ser.baudrate=nb_rate
+
+    burn_flash_bin(ser, modem, iot_flash_file)
+    myprint ("Total transmission time: %s s" % str(trans_time_0+trans_time_1))
+    time.sleep(3)
+    ser_read_data=ser.read(4096)
+    print_device_str(ser_read_data)
+
+
+
+
 # kunlun.py [upload.bin]
 if __name__ == '__main__':
     if(len(sys.argv)<2):
@@ -212,33 +260,7 @@ if __name__ == '__main__':
     # 发送启动字符让设备进入xmodem模式
     init_send(ser, init_str.encode("utf-8"))
     burn_ram_bin(modem, ram_file)
+    # burn_ram_bin(modem, "kl3_ram_build.bin")
 
-    # # ser.baudrate=nb_rate
-    # time.sleep(0.5)
-
-    # burn_flash_bin(ser, modem, iot_flash_file)
-    # 显示flash信息
-    ser.write(b"f i\n")
-    time.sleep(0.5)
-    ser_read_data=ser.read(4096).decode('utf-8')
-    myprint(ser_read_data)
-    with open(calc_flash_info_name(),mode='w+',encoding='utf-8') as f:
-        f.writelines(ser_read_data.split('\r\n'))
-    # 显示image信息
-    ser.write(b"f s\n")
-    time.sleep(0.5)
-    ser_read_data=ser.read(4096).decode('utf-8')
-    myprint(ser_read_data)
-    with open(calc_flash_info_name(),mode='a+',encoding='utf-8') as f:
-        f.writelines(ser_read_data.split('\r\n'))
-    # 上传整个镜像
-    ser.write(b"fw u d all\n")
-    time.sleep(0.5)
-    myprint(ser.read(4096).decode('utf-8'))
-    upload_bin(modem,calc_upload_name())
-
-    myprint ("Total transmission time: %s s" % str(trans_time_0+trans_time_1))
-    myprint("Start transform bin to hex.")
-    bin_to_hex_file(calc_upload_name(), calc_hex_name(),calc_flash_info_name())
-    myprint("Transform to hex end.")
-
+    upload_fun()
+    # burn_fun()
diff --git a/xmodem_config.txt b/xmodem_config.txt
index 49c132a..5a99808 100644
--- a/xmodem_config.txt
+++ b/xmodem_config.txt
@@ -6,9 +6,9 @@
 
 init_str = WQKL
 
-serial_port_num = 3
+serial_port_num = 11
 baud_rate = 115200
-new_baud_rate = 460800
+new_baud_rate = 468000
 
-ram_file = bootram_kl1.bin
-iot_flash_file = HZ-SG-QJCCO03-SOLAR-F-PSRAM-E-P12087-RF-DUAL-11.0.0.1-dbd3324-20240709.bin
\ No newline at end of file
+ram_file = bootram_kl3_build.bin
+iot_flash_file = HTZD_STA_xts.bin
\ No newline at end of file