The present invention relates to a compact spraying module for spraying a liquid in the form of droplets (18) for treating a target. Said module includes a spraying unit (3) including a nozzle containing at least one spraying member and a fan that is capable of generating a carrying air flow in the nozzle and of carrying the droplets originating from said member to the target. Said module includes its own liquid supply system (7, 11) that and includes an electric pump (11), an electronic control and monitoring unit, a holder that keeps said pump near the spraying unit, an individual communication interface (20), and a power supply interface (20'). The invention also relates to a system for spraying and controlling a plurality of such modules and to a method for controlling modules of such a system.
