Python OptoMMP - reading channels names and strings

groov EPIC
1

I’m able to read via Python the channels string registers for named IO channels, but seem to only ever get one channel at a time (always returned a single byte array character string of 1 char.

I’m using this to read in python 3.9:

device = optommp.O22MMP(‘127.0.0.1’) #or a static IP when read remotely
RAW = device.ReadRawOffset(0xF0100030, 32, ‘s’) #reads the first modules first channel

My RAW response is always b’S’ no matter how many characters I set it to read (32).
I can read these in the OptoManage Webpanel under IOServices/GenericMMP
image

From python, I seem to only get 1 byte at a time, but it does read them correctly. How do I read the whole string at once?

Thanks for any help. My goal, is to synchronize some of channel config with our own app config so a user can modify from our API, but still have it show up in the IO list correctly, and visa versa.

Mike

2

OK, so seems the ReadRawOffset only ever returns one value, so I found out that the ReadBlock function can do this.

then, have to strip the results of whitespace at the end if the character string is empty.
I just run RAW = device.ReadBlock(memRegister, length)
result = RAW.decode(‘utf-8’)[16:].rstrip(‘\x00’)

Gets me what I needed!

1 Like
3

Thanks for the self-closing of the question < grin >
And yeah, that pesky white space at the end has caused a few head scratches.
Glad you got it sorted.
I think @torchard will be very interested in what you found.

1 Like