I did try to use the new firmware twice. So there will be two posts.
I just installed new 2.03 beta firmware and attached it to the charging battery. Logging interval was 5 seconds (I actually needed data, it was not just a firmware test).
After two days I switched meter off by rotating the switch (I did not stop logging before switching it off).
Unfortunately I did not take the photo of the meter before switching off, but I think that the counter started with 4, which I believe means that the leading digit in number of records should be 4.
The SD card happened to contain corrupted file system. After Windows checked and fixed it, I found this (I skipped older files):
31.01.2020 21:57 <DIR> FOUND.000
01.01.1601 03:00 0 08240001.CSV
31.01.2020 10:30 1 190 258 20013001.CSV
FOUND.000 directory:
31.01.2020 21:57 <DIR> .
31.01.2020 21:57 <DIR> ..
31.01.2020 21:57 32 768 FILE0000.CHK
31.01.2020 21:57 32 768 FILE0001.CHK
31.01.2020 21:57 32 768 FILE0002.CHK
31.01.2020 21:57 32 768 FILE0003.CHK
31.01.2020 21:57 32 768 FILE0004.CHK
31.01.2020 21:57 32 768 FILE0005.CHK
31.01.2020 21:57 32 768 FILE0006.CHK
31.01.2020 21:57 32 768 FILE0007.CHK
All .CHK files contained only zeroes.
20013001.CSV looks OK, but contains only 24513 entries:
START,2020/01/30,00:22:27,
...
24513,2020/01/30,22:15:27,DCV,006.692,V,,,,,,,,
(5 seconds * 24513 entries) = 34 hours 2 minutes and 45 seconds.
22:15:27 - 00:22:27 = 21:53:00
That's strange. Where did the difference come from?
Probably from this:
$ perl -lne 'm#^\d+,(\d{4}/\d{2}/\d{2},\d{2}:\d{2}):\d{2},DCV,[\d\.+-]+,V,,,,,,,,# and print "$1"' 20013001.CSV | sort | uniq -c | sort -n | awk '$1 != 12'
4 2020/01/30,15:02
7 2020/01/30,00:22
8 2020/01/30,14:57
11 2020/01/30,04:32
11 2020/01/30,07:27
11 2020/01/30,13:37
11 2020/01/30,16:32
453 2020/01/30,22:12
1323 2020/01/30,22:17
1764 2020/01/30,22:16
1770 2020/01/30,22:15
1776 2020/01/30,22:13
1776 2020/01/30,22:14
$
The code above prints "minute" part from the line, calculates number of entries per minute (sort | uniq -c), sorts by the number of entries (sort -n) and filters out all minutes with 12 entries.
This way we have [2020/01/30,15:02] with 4 records, [2020/01/30,00:22] with 7 records and on up to [2020/01/30,22:13] and [2020/01/30,22:14] with 1776 records.
Here are some of the records:
$ egrep -B 1 -A 1 '^[0-9].*,(2020/01/30,15:02|2020/01/30,00:22|2020/01/30,14:57|2020/01/30,04:32|2020/01/30,07:27|2020/01/30,13:37|2020/01/30,16:32|2020/01/30,22:12|2020/01/30,22:17|2020/01/30,22:16|2020/01/30,22:15|2020/01/30,22:13|2020/01/30,22:14):' 20013001.CSV
No. ,Date ,Time ,Func. ,Value,Unit,Func. ,Value,Unit,Func. ,Value,Unit,
1,2020/01/30,00:22:28,DCV,006.579,V,,,,,,,,
2,2020/01/30,00:22:33,DCV,006.579,V,,,,,,,,
3,2020/01/30,00:22:38,DCV,006.580,V,,,,,,,,
4,2020/01/30,00:22:43,DCV,006.580,V,,,,,,,,
5,2020/01/30,00:22:48,DCV,006.578,V,,,,,,,,
6,2020/01/30,00:22:53,DCV,006.579,V,,,,,,,,
7,2020/01/30,00:22:58,DCV,006.580,V,,,,,,,,
8,2020/01/30,00:23:03,DCV,006.581,V,,,,,,,,
--
2995,2020/01/30,04:31:59,DCV,006.555,V,,,,,,,,
2996,2020/01/30,04:32:04,DCV,006.555,V,,,,,,,,
2997,2020/01/30,04:32:09,DCV,006.557,V,,,,,,,,
2998,2020/01/30,04:32:14,DCV,006.555,V,,,,,,,,
2999,2020/01/30,04:32:19,DCV,006.557,V,,,,,,,,
3000,2020/01/30,04:32:24,DCV,006.555,V,,,,,,,,
3001,2020/01/30,04:32:30,DCV,006.556,V,,,,,,,,
3002,2020/01/30,04:32:35,DCV,006.555,V,,,,,,,,
3003,2020/01/30,04:32:40,DCV,006.557,V,,,,,,,,
3004,2020/01/30,04:32:45,DCV,006.555,V,,,,,,,,
3005,2020/01/30,04:32:50,DCV,006.559,V,,,,,,,,
3006,2020/01/30,04:32:55,DCV,006.562,V,,,,,,,,
3007,2020/01/30,04:33:00,DCV,006.559,V,,,,,,,,
--
5094,2020/01/30,07:26:59,DCV,006.664,V,,,,,,,,
5095,2020/01/30,07:27:04,DCV,006.664,V,,,,,,,,
5096,2020/01/30,07:27:09,DCV,006.660,V,,,,,,,,
5097,2020/01/30,07:27:14,DCV,006.665,V,,,,,,,,
5098,2020/01/30,07:27:19,DCV,006.660,V,,,,,,,,
5099,2020/01/30,07:27:24,DCV,006.671,V,,,,,,,,
5100,2020/01/30,07:27:29,DCV,006.659,V,,,,,,,,
5101,2020/01/30,07:27:35,DCV,006.660,V,,,,,,,,
5102,2020/01/30,07:27:40,DCV,006.668,V,,,,,,,,
5103,2020/01/30,07:27:45,DCV,006.666,V,,,,,,,,
5104,2020/01/30,07:27:50,DCV,006.661,V,,,,,,,,
5105,2020/01/30,07:27:55,DCV,006.665,V,,,,,,,,
5106,2020/01/30,07:28:00,DCV,006.667,V,,,,,,,,
--
9533,2020/01/30,13:36:59,DCV,006.813,V,,,,,,,,
9534,2020/01/30,13:37:04,DCV,006.808,V,,,,,,,,
9535,2020/01/30,13:37:09,DCV,006.806,V,,,,,,,,
9536,2020/01/30,13:37:14,DCV,006.810,V,,,,,,,,
9537,2020/01/30,13:37:19,DCV,006.811,V,,,,,,,,
9538,2020/01/30,13:37:24,DCV,006.796,V,,,,,,,,
9539,2020/01/30,13:37:29,DCV,006.806,V,,,,,,,,
9540,2020/01/30,13:37:34,DCV,006.816,V,,,,,,,,
9541,2020/01/30,13:37:40,DCV,006.802,V,,,,,,,,
9542,2020/01/30,13:37:45,DCV,006.810,V,,,,,,,,
9543,2020/01/30,13:37:50,DCV,006.816,V,,,,,,,,
9544,2020/01/30,13:37:55,DCV,006.806,V,,,,,,,,
9545,2020/01/30,13:38:00,DCV,006.809,V,,,,,,,,
--
10492,2020/01/30,14:56:55,DCV,006.827,V,,,,,,,,
10493,2020/01/30,14:57:00,DCV,006.820,V,,,,,,,,
10494,2020/01/30,14:57:05,DCV,006.809,V,,,,,,,,
10495,2020/01/30,14:57:10,DCV,006.808,V,,,,,,,,
10496,2020/01/30,14:57:15,DCV,006.819,V,,,,,,,,
10497,2020/01/30,14:57:20,DCV,006.818,V,,,,,,,,
10498,2020/01/30,14:57:25,DCV,006.815,V,,,,,,,,
10499,2020/01/30,14:57:30,DCV,006.818,V,,,,,,,,
10500,2020/01/30,14:57:35,DCV,006.808,V,,,,,,,,
10501,2020/01/30,15:02:43,DCV,006.824,V,,,,,,,,
10502,2020/01/30,15:02:48,DCV,006.828,V,,,,,,,,
10503,2020/01/30,15:02:53,DCV,006.825,V,,,,,,,,
10504,2020/01/30,15:02:58,DCV,006.819,V,,,,,,,,
...
18397,2020/01/30,22:15:47,DCV,006.692,V,,,,,,,,
18398,2020/01/30,22:15:52,DCV,006.693,V,,,,,,,,
18399,2020/01/30,22:15:57,DCV,006.692,V,,,,,,,,
18400,2020/01/30,22:16:02,DCV,006.692,V,,,,,,,,
18401,2020/01/30,22:16:07,DCV,006.692,V,,,,,,,,
18402,2020/01/30,22:16:12,DCV,006.693,V,,,,,,,,
18403,2020/01/30,22:16:17,DCV,006.693,V,,,,,,,,
18404,2020/01/30,22:16:22,DCV,006.693,V,,,,,,,,
18405,2020/01/30,22:16:27,DCV,006.692,V,,,,,,,,
18406,2020/01/30,22:16:32,DCV,006.694,V,,,,,,,,
18407,2020/01/30,22:16:37,DCV,006.692,V,,,,,,,,
18408,2020/01/30,22:16:42,DCV,006.693,V,,,,,,,,
18409,2020/01/30,22:16:47,DCV,006.693,V,,,,,,,,
18410,2020/01/30,22:16:52,DCV,006.692,V,,,,,,,,
18411,2020/01/30,22:16:57,DCV,006.692,V,,,,,,,,
18412,2020/01/30,22:17:02,DCV,006.693,V,,,,,,,,
18413,2020/01/30,22:17:07,DCV,006.693,V,,,,,,,,
18414,2020/01/30,22:17:12,DCV,006.695,V,,,,,,,,
18415,2020/01/30,22:17:17,DCV,006.694,V,,,,,,,,
18416,2020/01/30,22:17:22,DCV,006.693,V,,,,,,,,
18417,2020/01/30,22:17:27,DCV,006.693,V,,,,,,,,
18418,2020/01/30,22:17:32,DCV,006.689,V,,,,,,,,
18419,2020/01/30,22:17:37,DCV,006.690,V,,,,,,,,
18420,2020/01/30,22:17:42,DCV,006.691,V,,,,,,,,
18421,2020/01/30,22:12:47,DCV,006.692,V,,,,,,,,
18422,2020/01/30,22:12:52,DCV,006.692,V,,,,,,,,
18423,2020/01/30,22:12:57,DCV,006.691,V,,,,,,,,
18424,2020/01/30,22:13:02,DCV,006.691,V,,,,,,,,
18425,2020/01/30,22:13:07,DCV,006.690,V,,,,,,,,
18426,2020/01/30,22:13:12,DCV,006.690,V,,,,,,,,
18427,2020/01/30,22:13:17,DCV,006.688,V,,,,,,,,
18428,2020/01/30,22:13:22,DCV,006.686,V,,,,,,,,
18429,2020/01/30,22:13:27,DCV,006.688,V,,,,,,,,
18430,2020/01/30,22:13:32,DCV,006.689,V,,,,,,,,
18431,2020/01/30,22:13:37,DCV,006.691,V,,,,,,,,
18432,2020/01/30,22:13:42,DCV,006.689,V,,,,,,,,
18433,2020/01/30,22:13:47,DCV,006.689,V,,,,,,,,
18434,2020/01/30,22:13:52,DCV,006.687,V,,,,,,,,
18435,2020/01/30,22:13:57,DCV,006.688,V,,,,,,,,
18436,2020/01/30,22:14:02,DCV,006.688,V,,,,,,,,
18437,2020/01/30,22:14:07,DCV,006.686,V,,,,,,,,
18438,2020/01/30,22:14:12,DCV,006.688,V,,,,,,,,
18439,2020/01/30,22:14:17,DCV,006.689,V,,,,,,,,
18440,2020/01/30,22:14:22,DCV,006.688,V,,,,,,,,
18441,2020/01/30,22:14:27,DCV,006.689,V,,,,,,,,
18442,2020/01/30,22:14:32,DCV,006.689,V,,,,,,,,
18443,2020/01/30,22:14:37,DCV,006.690,V,,,,,,,,
18444,2020/01/30,22:14:42,DCV,006.691,V,,,,,,,,
18445,2020/01/30,22:14:47,DCV,006.691,V,,,,,,,,
18446,2020/01/30,22:14:52,DCV,006.691,V,,,,,,,,
18447,2020/01/30,22:14:57,DCV,006.693,V,,,,,,,,
18448,2020/01/30,22:15:02,DCV,006.693,V,,,,,,,,
18449,2020/01/30,22:15:07,DCV,006.691,V,,,,,,,,
18450,2020/01/30,22:15:12,DCV,006.693,V,,,,,,,,
18451,2020/01/30,22:15:17,DCV,006.693,V,,,,,,,,
18452,2020/01/30,22:15:22,DCV,006.693,V,,,,,,,,
18453,2020/01/30,22:15:27,DCV,006.692,V,,,,,,,,
18454,2020/01/30,22:15:32,DCV,006.691,V,,,,,,,,
18455,2020/01/30,22:15:37,DCV,006.690,V,,,,,,,,
18456,2020/01/30,22:15:42,DCV,006.692,V,,,,,,,,
18457,2020/01/30,22:15:47,DCV,006.692,V,,,,,,,,
18458,2020/01/30,22:15:52,DCV,006.693,V,,,,,,,,
18459,2020/01/30,22:15:57,DCV,006.692,V,,,,,,,,
18460,2020/01/30,22:16:02,DCV,006.692,V,,,,,,,,
...
(... - means I manually removed lines from the output)
So basically the longer the logging was on, the more garbage is in the output. See how 22:15 was followed by 22:16, 22:17, and then again 22:12, 22:13, 22:14, 22:15, 22:16 ...
File is attached.