The project proposes to explore the idea of an ubiquitous public data service for transmitting short messages over wireless networks. Any user or source of the service will be able to send a short message at a very low rate to some destination address over various access networks: open 802.11hotspots, base stations of LTE, car-to-infrastructure stations of 802.11p. The user or a device sends its message to the nearest wireless network at hand (for instance a 802.11 hotspot) that will forward it in a multihop way to the destination by the elements of the infrastructure network.