  In this paper, we present the design and implementation of our latest
OpenVLC1.3 platform to perform research in Visible Light Communication Systems.
We retain the advantages of the previous versions such as TCP/IP layers
support, software programmability and low-cost front-end. We re-design the
transceiver to support higher modulation rates and sensitivity. This allows us
to reach a throughput of 400 kb/s (a factor of 4 with respect to the previous
version) and increase the distance by a factor of 3.5. We further improve the
software robustness of the system and reduce the form factor at similar
hardware cost.
