A .csv file that you must upload with your deviceId list and/or custom data. The CSV file must contain always a column with the header externalCode al least and your external ids.

Example device list

  externalCode,customData1
  Gi0rc7EB7GwExEQ82Rg5h2eQpddsjuVbp,customDataValue1
  Dmj1ZmDkIjcjSejNsjLIme5dublwVk3qi,customDataValu2
  ...

When we need to use these custom variables in the html, we will identify them with double brackets (e.g. {{ customDataExample }} ) so that when we replace them, we can quickly identify them.

  <h1>Dear customer {{ customerName }}</h1>
  ...

In the above example, the variable customerName should be replaced by its value.