some problem occurred: No communication with the instrument (no answer)
Traceback (most recent call last):
File "server.py", line 43, in <module>
print('Model: ', controller.model())
File "/home/pi/.local/lib/python2.7/site-packages/solarshed/controllers/renogy_rover.py", line 41, in model
return self.read_string(12, numberOfRegisters=8)
File "/home/pi/.local/lib/python2.7/site-packages/minimalmodbus.py", line 443, in read_string
numberOfRegisters=numberOfRegisters, payloadformat='string')
File "/home/pi/.local/lib/python2.7/site-packages/minimalmodbus.py", line 697, in _genericCommand
payloadFromSlave = self._performCommand(functioncode, payloadToSlave)
File "/home/pi/.local/lib/python2.7/site-packages/minimalmodbus.py", line 795, in _performCommand
response = self._communicate(request, number_of_bytes_to_read)
File "/home/pi/.local/lib/python2.7/site-packages/minimalmodbus.py", line 930, in _communicate
raise IOError('No communication with the instrument (no answer)')