Thank you for reply
about the arduino code i get the data from the sensor, into a string and then send it all to the app. O
n the app i split the string into 1 variable. what i want is to create a list from the values of that variable over a period of time and pick the largest value in that list.
Code here:
That is also my orientation. I'm having a problem creating a list.
what problem?
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The values are saved in the list as items and I don't know how to compare the values of the items in the list. Can you help me?
this block error:
I don't see any problem with this block.
what error do you get?
this error:
Display the contents of your list in a label to see what's wrong with that list. You probably have empty values in the list, without numbers...
Check your Arduino code to see if it's sneaking in extra messages that don't have numbers.
There is an if/then value block you can use to return true or false values for noncomparable list items and there is a IS A Number block that will identify garbage before you apply math in your max/min tests
If your global A like this, you will get a list ["","123"], empty string can not be comparing with 123
A garbage filtering comparator...
AND(
Is a number(num1),
Is a number (num2),
num1 < num2)
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You need to check if it's empty or not BEFORE you decidet to add it to the String/List.
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this problem is done. but the block only compares 2 values at the moment when i press the button, I want to compare all the values in the list. how?
as mentioned, you need to make sure the item is a number before add to the list.
then you will not need the 'is number' block in the comparator.
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how to compare all the values in the list. this block only compares 2 values when i press button 
remove the 'is number 'block
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It looks like you send three variables but you want the maximum value of the entire set of variables.
Send the text with "," instead of "|" for easier coding.
borrar_listaord.aia (3.6 KB)
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Code based on ABG-s Maximum ermitteln - (Get the Max Number from a List) - #9 by SteveJG
might help. See his draggable blocks in post 10 to the above link.
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Thank you so much, it helped me. Can I use 2 TinyDB in a app?
You can use multiple TinyDBs in the app.
If the NameSpace of the TinyDBs is the same, it will be the same TinyDB, example:
TinyDB1, NameSpace=TinyDB1
TinyDB2, NameSpace=TinyDB1 are the same TinyDB.
If they had different NameSpace they would be different.
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