Customer terminal and self-shopping system

A customer terminal of a self-scanning shopping system, the system being configured to store at least one shopping session in a non volatile memory, the customer terminal comprising:

• a main processor;
• a product code reader;
• a location for non volatile storage of an open shopping session indicator and/or an identifier, either direct or indirect, of a shopping session;
• and
• a supervisor circuit,
• wherein in a working operating state, the main processor is configured to periodically send a heartbeat to the supervisor circuit,
• wherein the supervisor circuit is configured to command an automatic reset of the main processor when, from the lack of receipt of the heartbeat, it detects a non working operating state of the main processor, and
• the main processor is configured, upon reset, to check whether there is an open shopping session based on the contents of said memory location, and in the affirmative case to automatically restore said shopping session.