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Description​

The Payter terminal is always scanning, waiting on a card to be presented. The trigger to a specific, existing charge session is when the card data that is read matches that for the existing session.

Dependencies​

The Charger Controller must ensure the terminal is always scanning. The Charger Controller must record the unique cardId to a given session and be able to reference that record.

Step by Step Process​

  1. The Charger Controller sends the Start command to the terminal, typically immediately after the terminal has finished with the last activity and is otherwise idle
  2. Driver presents their EMV/RFID card to the Payter terminal
  3. The card data is read and returned to the Charger Controller
  4. The Charger Controller recognises the card data as belonging to an existing charge session and stops the existing charge session
  5. The Charger Controller calculates the final amount and sends the amount to the terminal
  6. The Payter terminal UI (optional) or charger UI displays the final session amount and provides a receipt.