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#!/usr/bin/env python3
#
# A quick script to generate modbus test data, it requires minimalmodbus.
#
# This is free and unencumbered software released into the public domain.
import time
import minimalmodbus
minimalmodbus.PARITY= 'E'
connection = minimalmodbus.Instrument("/dev/ttyUSB0", 1)
while True:
try:
time.sleep(.05)
# function 1
a = connection.read_bit(3, functioncode=1)
# function 2
b = connection.read_bit(0, functioncode=2)
# function 3
connection.read_register(99, functioncode=3)
# function 4
connection.read_register(120, functioncode=4)
# funciton 5
connection.write_bit(3, True, functioncode=5)
# function 6
connection.write_register(1, 0b01010101, functioncode=6)
# function 15
connection.write_bit(2, True, functioncode=15)
# function 16
connection.write_register(1, 0b10101010, functioncode=16)
except IOError:
pass
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