added modbusTester

piflow/modbusTester.py

@@ -0,0 +1,12 @@
+import minimalmodbus
+
+minimalmodbus.BAUDRATE = 9600
+minimalmodbus.STOPBITS = 1
+
+instrument = minimalmodbus.Instrument('/dev/ttyS0', 1) #device, modbus slave address
+instrument.debug = True
+try:
+    value = instrument.read_float(599) #register -1 for float
+    print("Value: {}".format(value))
+except Exception as e:
+    print("Error: {}".format(e))