Low-pressure drip irrigation system, comprising a distribution pipe made of thin-walled sleeve collapsible when empty and designed to operate under hydraulic head up to 3 m H2O, having a plurality of holes in the walls thereof, a plurality of branch tubes equipped with low-pressure drip emitters; and a plurality of connectors connecting the branch tubes to the holes of the distribution pipe. In one embodiment, the modified algae over-expresses isoamylase and accumulates much higher amounts of starch than unmodified algae. In various embodiments, the wireless device is further provided with at least one time sharing state machine to facilitate the coordinated control of the wireless transceivers.