Response exception on alternating function calls

[timbotimbo]

When trying different functions in sequence, occasionally the response will be detected as invalid even though it seems to be correct.
Here I alternate get_lamp_hours() with set_input_soure()

I added print('raw: ' + txt), to see the actual response.

As a quick fix, calling flushInput() before writing to the serial seems to prevent this. So something might be sticking around in the buffer.

[knrdl]

Hi, first of all thanks for your feedback ... but I cannot reproduce the problem:

>>> optotron.set_input_source('hdmi'); optotron.get_lamp_hours()
1247
>>> optotron.set_input_source('hdmi'); optotron.get_lamp_hours()
1247
>>> optotron.set_input_source('hdmi'); optotron.get_lamp_hours()
1247
>>> optotron.set_input_source('hdmi'); optotron.get_lamp_hours()
1247
>>> optotron.set_input_source('hdmi'); optotron.get_lamp_hours()
1247
>>> optotron.set_input_source('hdmi'); optotron.get_lamp_hours()
1247
>>> optotron.set_input_source('hdmi'); optotron.get_lamp_hours()
1247
>>> optotron.set_input_source('hdmi'); optotron.get_lamp_hours()
1247
>>> optotron.set_input_source('hdmi'); optotron.get_lamp_hours()
1247
>>> optotron.set_input_source('hdmi'); optotron.get_lamp_hours()
1247
>>> optotron.set_input_source('hdmi'); optotron.get_lamp_hours()
1247
>>> optotron.set_input_source('hdmi'); optotron.get_lamp_hours()
1247
>>> optotron.set_input_source('hdmi'); optotron.get_lamp_hours()
1247
>>> optotron.set_input_source('hdmi')
>>> optotron.set_input_source('hdmi')
>>> optotron.set_input_source('hdmi')
>>> optotron.set_input_source('hdmi')
>>> optotron.set_input_source('hdmi')
>>> optotron.get_lamp_hours()
1247
>>> optotron.get_lamp_hours()
1247
>>> optotron.get_lamp_hours()
1247
>>> optotron.get_lamp_hours()
1247
>>> optotron.get_lamp_hours()
1247
>>> optotron.get_lamp_hours()
1247
>>> optotron.set_input_source('hdmi')
>>> optotron.set_input_source('hdmi')
>>> optotron.set_input_source('hdmi')

Anyway flushing buffers sounds like a good thing to do for me :)
If your solution works, please open a PR!

[timbotimbo]

Looks like the issue was caused by the cheap usb to serial adapter I used.

I no longer have access to the projector, so I won't make a pull request because I can't do any further testing.