e-Cattle is a IoT (Internet of Things) platform for precision livestock. It's aims to centralize and padronize all sensor data collected in farms to beef cattle production. To this, provides a RESTful API service bus to receive sensor data from smart objects with differents sensors and unknow brands/models. All data is semantically organized, persisted in no-SQL database and available in another RESTful API, with query language support, to be consumed by high level applications. Both two service buses and database are implemented in farm with a totem device type named BigBoxx, build with a Raspberry PI. Therefore, the rural property do not need a internet connection, as is common in rural areas of Brazil.