Build a string via the visualisation

Hi,

I want to build a numeric keypad on a visualisation page which builds a string, then triggers an action when i press 'enter'. Is it possible to build a string in this way?

I.e. pressing '1,2,3,4' builds a string '1234' in a user variable. Plan then is to when you push 'enter' this string is sent to an API endpoint.

 

I have a similar thing, here's what i did
on the vis create a button for each number 0-9 plus an enter button, make them all preset i have GA 121 called pin_no for this
eg
1 = preset Ga 121 level to 1
2 = preset Ga 121 level to 2 and so on
0 = preset Ga 121 level to 10
enter = preset GA 121 level to 15

then an event script on GA 121 to manage the rest

Code:

local pin = event.getvalue()

if pin == 15 then -- enter has been pressed
 
 last = storage.get('pin_store')
  log(last)
-- execute some function here
  storage.set('pin_store', nil)
end


if pin >=1 and pin <=10 then
 
  last = storage.get('pin_store')
 
  if not last then -- this will get the first press if storage has no value
    storage.set('pin_store', tostring(pin))
  else
 
    storage.set('pin_store', last .. tostring(pin))
 
 end
end
 
SetLightingLevel(121, 50, 0)  -- reset GA to something not between 1-10 so a number can be used twice

 

Forum is screwing up the code formatting again.................... there is some ' and , and ) missing etc....