FaaS tool consists of a software and a hardware parts: 1.Farm management makes a crop condition analysis with the use of AI technology and 2. IoT solution which is represented by UAV technologies with an innovative battery, a charging unit and own innovative telemetry. Our unique value is a robotic system for preparing and refilling a working mixture, charging, and changing batteries, it provides autonomous work of drones fleet. AI technology analyze multispectral images, determine the level of weed infestation and identify sort of weeds after that it prepares a mission for a drone sprayer that saves a crop from weeds. Due to machine vision and multispectral shots (that were analyzed with the help of a chip embedded in a drone while the mission-drone did some scouting) the farmer or any operator may do differential spraying of PPP ( use less of it but keep up the effectiveness) what is an element of precision and smart farming.