=========================================================================== EWSN 17 Posters and Demos Review #18A --------------------------------------------------------------------------- Paper #18: Demo: Off-the-shelf bi-directional visible light communication module for IoT devices and smartphones --------------------------------------------------------------------------- Overall merit: 4. Accept Reviewer expertise: 2. Some familiarity ===== Paper summary ===== This demo abstract presents a system that allows an IoT device to communicate with a smartphone by utilizing visible light. ===== Comments for author ===== The abstract is well-written and I think it can be an interesting demo at the conference with a lot of opportunities for discussions. Nevertheless, there are several concerns with the practical applicability of the approach presented in this abstract. For instance, while a smartphone can be used to get the messages broadcasted by an IoT device with its built-in camera, communication between several IoT devices will also require such a camera. At this point, it is arguably that equipping each device with a camera is cheaper in terms of monetary and energy costs compared to BLE or Wi-Fi. =========================================================================== EWSN 17 Posters and Demos Review #18B --------------------------------------------------------------------------- Paper #18: Demo: Off-the-shelf bi-directional visible light communication module for IoT devices and smartphones --------------------------------------------------------------------------- Overall merit: 3. Weak accept Reviewer expertise: 2. Some familiarity ===== Paper summary ===== The demo proposes a bi-directional VLC system between a low-power sensor equipped with an LED and an off-the-shelf smartphone. ===== Comments for author ===== Even though the idea of VLC communication using the rolling shutter effect of smartphones' camera is not new, it is interesting how authors made this technique user friendly. In particular, I found interesting the way this system is able to hide the shutter effect from the user, while letting a background thread to decode the transmitted information. I think that this aspect is the most interesting part of the demo and should deserve more space in the 2-page paper. =========================================================================== EWSN 17 Posters and Demos Review #18C --------------------------------------------------------------------------- Paper #18: Demo: Off-the-shelf bi-directional visible light communication module for IoT devices and smartphones --------------------------------------------------------------------------- Overall merit: 5. Strong accept Reviewer expertise: 4. Expert ===== Paper summary ===== This demo presents a bi-directional VLC system between a LED and a smartphone. The demo abstract is well written and easy to follow. ===== Comments for author ===== The unique feature of the proposed VLC system, compared with the existing systems, is the bi-directional transmissions. The authors may want to give some example applications of using such a bi-directional transmissions. Can you achieve full-duplex transmissions with the proposed system? Some statistic experimental results would be very interesting, like packet reception rate, data rates of both links.