ROS 2 Agriculture Message Definitions (ROS2-FARM Package)

ROS2-FARM addresses a critical gap in agricultural robotics: the lack of consensus on semantic meaning and structure for farm-relevant sensor, actuator, and decision data. Unlike generic ROS 2 messages (e.g., sensor_msgs/PointCloud2 or geometry_msgs/PoseStamped), ROS2-FARM introduces semantically enriched types like CropHealth, SoilMoistureProfile, and FieldBoundary that encode units, coordinate frames, uncertainty models, and agricultural ontologies (e.g., FAO soil classification codes or NDVI interpretation ranges). The package adheres to ROS 2’s type safety and compile-time validation principles, using .msg files defined in the ROS 2 Interface Definition Language and supporting automatic generation of C++, Python, and other language bindings. Its design emphasizes modularity—core messages reside in ros2_farm_msgs, while companion packages (e.g., ros2_farm_control, ros2_farm_perception) implement controllers and perception pipelines that consume and produce these messages. Practically, ROS2-FARM enables plug-and-play integration across heterogeneous hardware: a drone publishing multispectral imagery metadata can interoperate with a ground robot executing variable-rate application plans—all sharing common understanding of 'field_id', 'crop_stage', or 'recommended_nitrogen_kg_ha' via standardized message schemas.