rpi_string_io.py

import revpimodio2

def ev(name, value):
    # payload is bytes, so we need to know the enconding (eg. ascii, utf-8, etc...)
    print(name, value.decode('ascii'))

rpi = revpimodio2.RevPiModIO(autorefresh=True, monitoring=True)
rpi.handlesignalend()

# define IO: change length of string in the frm argument
rpi.io['Output_1_i06'].replace_io('a_string', frm='30s')

# register event handler function
rpi.io.a_string.reg_event(ev)

rpi.mainloop()