Different recognition on digits if after a while (~ 1000 rounds)

[nliaudat]

The Problem

Hi,

Since last release v15.4.0 (Commit: 74d4f20) and dig-class100-0168_s2_q.tflite, I have bad recognition on digit after about 1000-1500 rounds.

As sample :
On error, 9 is recognized as 6.4

After reboot (with no water consumption), the recognition is good :

Version

15.4.0

Logfile

not helpfull : 

[0d00h00m00s] 2024-01-15T17:23:56 <INF> [MAIN] ==================== Start ======================
[0d00h00m00s] 2024-01-15T17:23:56 <INF> [MAIN] =================================================
[0d00h00m00s] 2024-01-15T17:23:56 <INF> [MAIN] PSRAM size: 8388608 byte (8MB / 64MBit)
[0d00h00m00s] 2024-01-15T17:23:56 <INF> [MAIN] Total heap: 4382019 byte
[0d00h00m04s] 2024-01-15T17:24:00 <INF> [MAIN] Camera info: PID: 0x26, VER: 0x42, MIDL: 0x7f, MIDH: 0xa2
[0d00h00m04s] 2024-01-15T17:24:00 <INF> [SDCARD] Basic R/W check started...
[0d00h00m04s] 2024-01-15T17:24:00 <INF> [SDCARD] Basic R/W check successful
[0d00h00m04s] 2024-01-15T17:24:00 <INF> [SNTP] TimeServer not defined, using default: pool.ntp.org
[0d00h00m04s] 2024-01-15T17:24:00 <INF> [SNTP] Configuring NTP Client...
[0d00h00m04s] 2024-01-15T18:24:00 <INF> [SNTP] Time zone set to CET-1CEST,M3.5.0,M10.5.0/3
[0d00h00m04s] 2024-01-15T18:24:00 <INF> [SNTP] Time is already set: 2024-01-15 18:24:00
[0d00h00m04s] 2024-01-15T18:24:00 <INF> [MAIN] CPU frequency: 240 MHz
[0d00h00m05s] 2024-01-15T18:24:01 <INF> [SDCARD] Folder/file presence check started...
[0d00h00m05s] 2024-01-15T18:24:01 <INF> [SDCARD] Folder/file presence check successful
[0d00h00m05s] 2024-01-15T18:24:01 <INF> [MAIN] Tag: 'v15.4.0', Release: v15.4.0 (Commit: 74d4f20), Date/Time: 2023-12-22 22:39, Web UI: Release: v15.4.0 (Commit: 74d4f20)

Expected Behavior

No response

Screenshots

No response

Additional Context

One strange thing is that it's append always on the 5th digit out of 8 and only on one of my board.

I post that issue cause it's perhaps related with memory consumption/leak

Memory Info before reboot

Total Free (Int + Ext):		846991 byte
Ext. RAM - Free:		766968 byte
Ext. RAM - Largest Free Block:		753664 byte
Ext. RAM - Min Free:		635968 byte
Int. RAM - Free:		80023 byte
Int. RAM - Largest Free Block:		77824 byte
Int. RAM - Min Free:		76707 byte

Memory Info after reboot

Total Free (Int + Ext):		854587 byte
Ext. RAM - Free:		760952 byte
Ext. RAM - Largest Free Block:		753664 byte
Ext. RAM - Min Free:		637472 byte
Int. RAM - Free:		93635 byte
Int. RAM - Largest Free Block:		90112 byte
Int. RAM - Min Free:		90015 byte

[caco3]

Can you provide debug logs of the good and bad recognition?

This really looks odd. AFAIK, there is no long term part considered in the algorithms.

[nliaudat]

No problem with 15.6.0
I have upgraded my 2 devices, sry