5 ms·
assume something similar to a digital punch card
by lucasverra 8y ago
assume something similar to a digital punch card
- matt_the_bass 8y agoWhat if the user supplied a token to a device at the location rather than the user collecting a token from the device? Depending upon how often you needed to confirm attendance, you could greatly reduce communications. You could also use the users device to power the locations device. Without more details from you it might be hard to come up with lots of ideas