variables on text payload

variables on text payload

based on this conversation 

currently only these items are able to be sent in sms / email / etc notifications. 
  • Device: $DEVICE$, variable: $VARIABLE$ with value: $VALUE$ $UNIT$.  At: $TIME$ in $LOCATION$

update to allow for named variables and/or their corresponding values $VARIABLE$SPEED$VALUE$ or $SPEED$ match returns column value from Variables Data 'bucket'
        Take a look at our updated roadmap here!
          What would you like to see on TagoIO?