Bigrams/trigrams limits?

datacyclist

Since this thread has been locked and the one where the issue is discussed is locked, too, I'll chime in here with some more testing.

I'm still fiddling around with chords that send more than one letter, i.e. bigrams and trigrams, since this is what makes typing with the twiddler really faster.

@Geoff noticed earlier that in the current firmware version there seems to be a limit on how many of those multi-character keystrokes can be created before older ones get overwritten.

What I tested now:

I had 18 bigrams and 2 trigrams.

I took out a few bigrams and swapped them for others which are more frequent, so no change in the amount of bigrams, everything fine.

Then I had the idea of swapping infrequent bigrams for frequent trigrams.

Turns out I had to deactivate/remove three bigrams (six letters) to incorporate two trigrams. Otherwise some existing bigram would get overwritten. Looks like some string or memory length limit to me.

Example: adding the trigram "ing" led to the bigram "st" no longer working, but returning "in" instead.

I'd appreciate if this thread wouldn't get locked this time and I'm happy to help, test and report, if needed. I'm on firmware 2.13.

datacyclist

datacyclist More testing, to make it reproducible for the twiddler devs. Consider this a reproducible example.

take the standard and unchanged config from the device (0.CFG)
upload the 0.CFG into the tuner
test: all the trigrams and bigrams in the standard config work fine
add eight more chords which are supposed to send bigrams as follows
results:
1M2M4L sends nothing (should send "ar")
1M3M4M sends "e " (should send "ent", one of the original multi-key chords)

If there are limits as to what the firmware can store/send, please let us know. I wouldn't expect a newer device to have fewer capabilities than an older version, though.

Geoff

Interesting findings @datacyclist ! On the T3, the limit is 256 multi keypress outputs. I use all 256 with 2, 3, and 4 character outputs without issue: I suspect this is a firmware problem on the T4, rather than a hardware limitation, as it looks like things break down at less than a tenth of the previous model's capacity.

One other perhaps relevant observation: I get not just swaps, but also single letter outputs and blank outputs on the T4 when trying multi keypress outputs.

Thank you for the effort you're putting in to this.

datacyclist

Geoff Yes, exactly, I get blank and single-letter outputs, too.

I'd love to learn typing on the device instead of debugging it, though 🙂

Geoff

datacyclist perhaps not a binding commitment, but in the old forum the plan was for future hardware to support 'much larger' lookups: https://forum.tekgear.com/t/maximum-of-256-of-multi-keystroke-entries-solved/976/2.

One of my closed items here is for not being able to add more than 255 multi keypress outputs. That limitation was removed from the tuner, suggesting the anticipated limit (if any) is higher than this.

datacyclist

The sha256sum of the 0.CFG file is 5024761e3bf5857d9f918e168ab6f5a7b35cff4f19fd81e76bb5ec7276e18a2e, just to make sure that we're talking about the same default config here.