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Code/test.py

+# import serial
+# from serial import Serial
+# ser = serial.Serial('/dev/ttyUSB0')  # open serial port
+# print(ser.name)         # check which port was really used
+# ser.write(b'hello')     # write a string
+# ser.readline(1000)
+# ser.close()             # close port
+import serial
+import time
+
+arduino = serial.Serial(port='/dev/cu.usbmodem14101', baudrate=115200, timeout=.1)
+
+
+def read_data():
+
+    time = 0
+    voltage = 0
+    current = 0
+
+    data = arduino.read(6)
+    data_arr = []
+    for byte in data:
+        data_arr.append(byte)
+
+    if len(data_arr != 0)
+        time  = (data_arr[0]<<8) + data_arr[1]
+        voltage = (data_arr[2]<<8) + data_arr[3]
+        current = (data_arr[4]<<8) + data_arr[5]
+
+    return len(data_arr), time, float(voltage / 1000.0), float(current / 1000.0)
+
+# while True:
+#     # num = input("Enter a number: ")
+#     num_bytes, time, voltage, current = write_read()
+#     # a = write_read()
+#     if num_bytes != 0:
+#         print("Time: {}, Volts: {}, Amps: {}".format(time, voltage, current))
+