MATLAB: ThingSpeakWrite() limit only 33% more in Home version than free, should that be

daily data limit calculationfree thingspeakhome thingspeakThingSpeak

The following code runs up to jj=500 in the Free version, and up to jj=700 in the Home version.
[ed: Free version and Home version of ThingSpeak channel]
But the account counters don't show any daily usage yet.
Thanks for help understanding where the input 4 entry data from a battery analyzer totals 4 columns x 27036 entries. But jj can't be anywhere near that! Thanks, Mark @W4CHL
% Send data to Grinspector test channel via thingSpeakWrite()
% 09-09 Student version limited, set jj = Max_records ~500, 
% 09-10 Home version also limited, but to same jj = ~700 ! Should be larger!?
tspchid = 861393;   jj = 700;
tStamps = datetime("2019-08-30") + seconds(gt_data(1:jj,1));
gt_timetable = timetable(tStamps, gt_data(1:jj,2), gt_data(1:jj,3), gt_data(1:jj,4));
thingSpeakWrite(tspchid,gt_timetable,'WriteKey','write-key');
Output for jj > 700:
>> gt_7t_plot_thspk
gt_fn = 
    "7tCurrieLiFe1-7tCurrieLiFe1.csv"
input file is 7tCurrieLiFe1-7tCurrieLiFe1.csv 
Time to read the dataset:  0.28 sec 
Time to parse the dataset: 0.0005 sec 
Time to loop by row over the dataset:  0.99 sec 
Time to plot the dataset:  0.12 sec 
Error using gt_7t_plot_thspk (line 125)
URL is incorrectly formed, or the requested feature is not supported in this version of ThingSpeak.

Best Answer

A side note: "URL is incorrectly formed,..." generally comes from writing non unique timestamps to a ThingSpeak channel. You cannot have two entries that have the same timestamp.
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