diff --git a/DSO138mini_data.py b/DSO138mini_data.py
new file mode 100644
index 0000000..af23dbb
--- /dev/null
+++ b/DSO138mini_data.py
@@ -0,0 +1,131 @@
+import serial
+import sys
+import json
+import numpy as np
+import matplotlib.pyplot as plt
+
+'''
+    Made for DSO 138 mini oscilloscope. Parameters and Plot data will saved to two separate JSON files.
+    return oci_paramerters and plot_data dictionary and a list respectively.
+    TODO: Format plot with parameters.
+'''
+
+if len(sys.argv) != 2 and len(sys.argv) != 4:
+    print("Invalid number of arguments. Use -h or --help for more information.")
+    sys.exit()
+# setting up the arguments
+if (sys.argv[1] == "-h" or sys.argv[1] == "--help"):
+    print(
+        "Usage: python DSO138mini.py [COM port] [baudrate (default=15200)] [output file]")
+    print("Example: python DSO138mini.py COM3 115200 data.txt")
+    sys.exit()
+
+if sys.platform == "linux" or sys.platform == "linux2":
+    COM = "/dev/tty" + sys.argv[1]
+elif sys.platform == "win32":
+    COM = sys.argv[1] if sys.argv[1].startswith("COM") else "COM" + sys.argv[1]
+else:
+    print("Unsupported platform")
+    sys.exit()
+
+# setting up the parameters
+BAUD = int(sys.argv[2]) if sys.argv[2].isnumeric() else 115200
+FILENAME = sys.argv[3]
+
+
+class DSO138mini:
+    def __init__(self, COM, BAUD, FILENAME="DSO138"):
+        self.COM = COM
+        self.BAUD = BAUD
+        self.FILENAME = FILENAME
+
+    def connect(self):
+
+        # initialize serial connection
+        try:
+            self.ser = serial.Serial(
+                port=self.COM, baudrate=self.BAUD, timeout=1)
+        except serial.SerialException:
+            print(f"Faild to open {COM} . Exiting...")
+            sys.exit()
+        except KeyboardInterrupt:
+            print("Interrupted by User, Exiting...")
+            sys.exit()
+
+        if (self.ser.is_open):
+            print("Connected to " + self.COM)
+
+    def save_data(self):
+        # open files
+        save_file_param = open(self.FILENAME + "_param.json", "w")
+        save_file_data = open(self.FILENAME + "_data.json", "w")
+        count = 0  # counter for lines DSO138 sends 1043 lines of data
+        oci_para = {}  # firtst 19 lines are parameters
+        # rest of the data is plot data (1023 lines) 3 columns (seq, time, voltage)
+        plot_data = []
+        try:
+            while True:
+                if (self.ser.in_waiting):
+                    data = self.ser.readline().decode("utf-8").strip().split(",")
+                    if (count < 19):
+                        oci_para[data[0].strip()] = data[1].strip()
+                        count += 1
+                    else:
+                        plot_data.append(
+                            [int(data[0]), int(data[1]), float(data[2])])
+                        count += 1
+
+                    if (count == 1043):
+                        self.ser.close()
+                        json.dump(oci_para, save_file_param)
+                        json.dump(plot_data, save_file_data)
+                        save_file_data.close()
+                        save_file_param.close()
+                        break
+                    print(data, flush=True)
+                else:
+                    print("waiting for data...", end="\r")
+
+        except KeyboardInterrupt:
+            self.ser.close()
+            json.dump(oci_para, save_file_param)
+            json.dump(plot_data, save_file_data)
+            save_file_data.close()
+            save_file_param.close()
+            print("Data saved to " + self.FILENAME)
+            sys.exit()
+        except serial.SerialException:
+            print("Serial connection lost. Exiting...")
+            sys.exit()
+            
+        return oci_para, plot_data
+
+    # TODO: Format plot with parameters.
+    def plot_data(self, plot_data, oci_para):
+        plot_data = np.array(plot_data)
+        plt.plot(plot_data[:, 1], plot_data[:, 2])
+        plt.xlabel('Time (ms)')
+        plt.ylabel('Voltage (V)')
+        plt.title("DSO138 mini")
+        x_plt = 5.5
+        y_plt = 5.5
+        for key, value in oci_para.items():
+            plt.text(x_plt, y_plt, key + ": " + value, fontsize=12,
+                     verticalalignment='top', horizontalalignment='left')
+            y_plt -= 0.5
+
+        plt.grid()
+        plt.show()
+
+
+def main():
+    dso = DSO138mini(COM, BAUD, FILENAME)
+    dso.connect()
+    oci_para, plot_data = dso.save_data()
+    print("Data saved to " + FILENAME)
+    # dso.plot_data(plot_data, oci_para)
+    return oci_para, plot_data
+
+
+if __name__ == "__main__":
+    main()
diff --git a/README.md b/README.md
index 0b4fad0..1e19888 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,20 @@
 # DSO138_mini_Data_Extractor
-Made for #DSO 138 mini oscilloscope#. Parameters and Plot data will saved to two separate JSON files.     return oci_paramerters and plot_data dictionary and a list respectively.
+Made for ```DSO 138 mini oscilloscope```. Parameters and Plot data will saved in two separate JSON files named ```<FILENAME>_param.json & <FILENAME>_data.json```. return oci_paramerters and plot_data dictionary and a list respectively.
+
+##  Requirements
+* UART Adapter and 3 jumper wires for Connection
+* Windows or Linux PC
+
+##  Setup
+*  Power up the device first.
+*  connect to the Serial Connection
+*  ```(PC) TXD -> RXD (HOST)```,
+*  ```(PC) RXD -> TXD (HOST)```,
+*  ```(PC) GND -> GND (HOST)```
+
+## Run the Script in your work folder
+*  Usage: ```python DSO138mini.py -h ``` or ``` python DSO138mini.py --help ``` for help
+*  Usage: ```python DSO138mini.py <COM> <BAUDRATE> <FILENAME> ```
+*  Example: ``` python DSO138mini.py COM9 115200 square_wave```
+*  You will prompt that ```Waiting for data``` if the connection is success
+*  Just hold down the SEL button for 3s.