Abstract: A serial peripheral interface (SPI) keyboard module for a parking meter comprises a plurality of key switches and at least one controller configured to detect a key press, determine a predetermined indicator associated with the pressed key and transmit the indicator to a keyboard interface of the parking meter. The SPI keyboard module provides a low power keyboard module that can be easily adapted to provide different keyboards or layouts without requiring significant changes to the parking meter electronics.

Abstract: A serial peripheral interface (SPI) keyboard module for a parking meter comprises a plurality of key switches and at least one controller configured to detect a key press, determine a predetermined indicator associated with the pressed key and transmit the indicator to a keyboard interface of the parking meter. The SPI keyboard module provides a low power keyboard module that can be easily adapted to provide different keyboards or layouts without requiring significant changes to the parking meter electronics.

Abstract: A serial peripheral interface (SPI) keyboard module for a parking meter comprises a plurality of key switches and at least one controller configured to detect a key press, determine a predetermined indicator associated with the pressed key and transmit the indicator to a keyboard interface of the parking meter. The SPI keyboard module provides a low power keyboard module that can be easily adapted to provide different keyboards or layouts without requiring significant changes to the parking meter electronics.

Abstract: In a parking system having one or more payment terminals for receiving payment for parking spaces, an information processing centre for receiving transaction and alarm information from the payment terminals, one or more enforcement terminals and a two-way telecommunications network for transmitting information in real time between the information processing centre and the payment and the enforcement terminals, an enforcement system and a method where a minimal amount of data is sent to enforcement terminals while in use in the field. The enforcement terminals are preloaded with parking space graphics. Occupancy data, which includes only the data necessary to provide expiry information such as, for instance, a data bit for each space indicating if it is “paid” or if it is “expired”, is transmitted in real time to the enforcement terminal. The occupancy data may be transmitted periodically or on demand by the enforcement terminal.