diff --git a/DSO138mini_data.py b/DSO138mini_data.py
new file mode 100644
index 0000000..20b9e66
--- /dev/null
+++ b/DSO138mini_data.py
@@ -0,0 +1,103 @@
+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) == 1 or sys.argv[1] == "-h" or sys.argv[1] == "--help"):
+    print("Usage: python DSO138mini.py [COM port] [baud rate] [output file]")
+    print("Example: python DSO138mini.py COM3 115200 data.txt")
+    sys.exit()
+
+if len(sys.argv) != 4:
+    print("Invalid number of arguments. Use -h or --help for more information.")
+    sys.exit()
+
+COM = sys.argv[1] if sys.argv[1].startswith("COM") else "COM" + sys.argv[1]
+BAUD = int(sys.argv[2]) if sys.argv[2].isnumeric() else 115200
+filename = sys.argv[3] if sys.argv[3].endswith(
+    ".txt") else sys.argv[3] + ".txt"
+save_file_param = open(filename+"_param.json", "w")
+save_file_data = open(filename+"_data.json", "w")
+
+
+class DSO138mini:
+    def __init__(self, COM, BAUD, FILENAME="data.txt"):
+        self.COM = COM
+        self.BAUD = BAUD
+        self.FILENAME = FILENAME
+
+    def connect(self):
+        self.ser = serial.Serial(port=self.COM, baudrate=self.BAUD, timeout=2)
+
+    def save_data(self):
+        count = 0
+        oci_para = {}
+        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", flush=True)
+        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 " + filename)
+            sys.exit()
+
+        return oci_para, plot_data
+
+    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()