Text length/image size

[syspart]

Hello
if i create a picture and send it as animation, what is the maximum size?
If I look on your code, the image width could be 255*8 (width of a char). But there is a second byte, and it looks like the high byte of an integer.
Or am I wrong?
greetings
syspart

[jnweiger]

That needs experimentation. :-)
I see there is also #15 from you.
This should enable larger images or longer messages indeed.

Did you have the crashes, that motivated #14
before or after applying #15 ?

[syspart]

With your code I got the overflow error, so I put my message into 5 parts whith 200 chars. But now I got the device error.

[jnweiger]

Merged #15 -- before the message limit was 255 characters, now it is 336 characters wehen using hidapi:

  File "/usr/local/lib/python3.6/dist-packages/pyhidapi/pyhidapi.py", line 641, in hid_write
    raise RuntimeError('hid_write() failed.')
RuntimeError: hid_write() failed.

Using usb.core, it happily uploads 520 characters (maybe more), but everything after character 507 is binary garbage.
So we are overwriting something... \('!')/

[jnweiger]

Now we can start decoding the firmware :-)

[syspart]

Be carefull. My device stopped responding with 4 x 255 chars. You should test it with the sertronic badges. Maybe you got a newer firmware. My one is from 13.11.2018. Am 19. Juli 2019 09:50:22 MESZ schrieb "Jürgen Weigert" <[email protected]>:

…

Merged #15 -- before the message limit was 255 characters, now it is 336 characters wehen using hidapi: ``` File "/usr/local/lib/python3.6/dist-packages/pyhidapi/pyhidapi.py", line 641, in hid_write raise RuntimeError('hid_write() failed.') RuntimeError: hid_write() failed. ``` using usb.core, it happily uploads 1300 chars (maybe more). Maybe with hidapi we should also use a loop? -- You are receiving this because you authored the thread. Reply to this email directly or view it on GitHub: #12 (comment)