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It’s nice to control where you start from and keep incrementing the value as we go forward. The COUNT library solves this problem.
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| title | Create a custom component using +COMPONENT |
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To test out the COUNT library, make a custom component. See Create a Component. |
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| title | Import the COUNT library into your project. |
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See Import Library if you need a refresher on how to do it. |
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| title | Create a custom number field called 'NextId' and set it to the value 156 in your card |
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First, in config.json add your Custom Fields. Then go to your component card and set the value to 156. See Custom Fields Note: You’ll need to change your component to use the DEVELOPMENT commit to see the newly added custom field. See Choosing the code to run for your component.  |
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| title | local NextId = COUNTget("NextId") is how we fetch the data |
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This is how we We can use COUNTget to get the data from a the custom field called NextId. We increment NextId by 1 each time the component runs. | Code Block |
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| local NextId = COUNTget("NextId")
NextId = NextId+1 |
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| title | COUNTset("NextId", NextId) is how we set it. |
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COUNTset saves the new value of the custom field in the custom field value file. | Code Block |
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| COUNTset("NextId", NextId) |
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| title | It This means we can see the NextId in the card view of the component - and we can set it too! |
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| title | To test this, we can set the component to run every 2 seconds using component.setTimer{delay=} |
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This is a complete little program to increment a custom number field: | Code Block |
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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 |
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