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titleCOUNTset("NextId", NextId) is how we set the count value
title

COUNTset saves the new value of the custom field in the custom field value file.

Code Block
languagelua
COUNTset("NextId", NextId)
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This means we can see the NextId in the card view of the component - and we can set it too!

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titleTo test this, we can set the component to run every 2 seconds using component.setTimer{delay=}

You can use component.setTimer{} is used here to run main every 2 seconds.

This is a complete little program to increment a custom number field:

Code Block
require "COUNT.COUNT"

function main(Data)
   --Poll the component every 2 seconds
   component.setTimer{delay=2000}
   local NextId = COUNTget("NextId")
   NextId = NextId+1
   COUNTset('NextId', NextId)
end
component.setTimer{} is used here to run main every 2 seconds. 
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titleThe COUNT library solves this problem by giving a convenient interface to get and set a custom field value
Remember, the Custom Fields values are stored on disc in JSON. This means we can load and save them programmatically.
This is how this library works.
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