nfc

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  • Seems the PuckJS with NFC should be best suited to a task with some form of dynamic message content that could contain some of the on-board sensor data or a time stamp. Also a good use case would be to setup some encrypted secure communications via BLE or wi-fi. Also firmware or software updates could be transfered through NFC. It would be most useful if you could do two way communications but read only is somewhat limited for a vast majority of use cases.

    I can't think of a use case for a dynamic changing URI but would think URI with additional NDEF records with certificate or auth key would make more interesting use case. This would require ability to craft multiple NDEF records which tags allow, especially the larger tags with more bytes of memory. It is very limiting if all you can do with the PuckJS is a simple ultralight tag with a URI record. For the static URI use case it would be much better to purchase an ultralight tag which are very inexpensive and consume no power as they are powered by the reading device and provide read/write functionality.

    For any kind of security use case you would need to make sure the tag had unique serial #ID/MAC that was not programmable, then you could form an NDEF record that could be encoded and validated as belonging to a specific device making for high security application. That is the advantage of NFC over BLE as it is considered more secure because of limited range (Near Field) and could be used for payment transactions. Also nice for providing secure access to specific devices.

    My domain of interest is in Electric Vehicle charging and how to control access to EV charging. Also of interest is vehicle information from OBDII CAN bus for fleet, vehicle VIN, and EV State Of Charge (SOC) information. All possible use cases for the PuckJS as it is a low power consumption device, small footprint and relatively inexpensive.

    If anyone is doing anything with OBDII I would be interested in a post on this topic as the PuckJS might make a good device to remote the CAN Bus info to a mobile device through BLE or NFC for some secure payment, vehicle to EV charger, or access control type applications.

    John

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