In the Makefile change the line:

cp $(BINARIES) $(SCRIPTS) $(BINDIR)

to

cp $(BINARIES) $(BINDIR)

# Enable CTS + RTS on P5 header for onboard serial
/usr/local/bin/gpio_setfunc 31 ALT3
/usr/local/bin/gpio_setfunc 30 ALT3

temps  = client.read_input_registers(30001, 4, unit=0x0a) # Address, count, slave address
print temps.registers
coil  = client.read_coils(10001, 8, unit=0x0a) # Address, count, slave address
print coil.bits

port="/dev/ttyUSB0"
to
port="/dev/ttyAMA0"