Cattle ranchers, loggers, and subsistence farmers migrated to the rain forest area. Many worked as loggers, lumbermen, and carpenters. The controversy pitted individual loggers and small sawmill owners against environmentalists. Modern systems are based on handheld data loggers and RFID sensors. Most carry sensors, data loggers and small cameras operated by timer circuits. Helmet shock data loggers and impact sensors help monitor impacts a player receives. Timber was cleared by settlers and small-time loggers in the late 1800s. This coreless transformer is used in clamp meters and power monitoring loggers. The vast areas of pine were exploited by early loggers. As forest clearing was expanding conflict between loggers and government and peasant communities increased. It is also used in some data loggers to monitor handling operations for shipping containers. Pings can be detected by protocol loggers like ippl. In certain areas of forest loggers re-plant their crop for future generations. They found use during the 1980s in data loggers for scientific and industrial equipment. In 2018 first NB-IoT data loggers are other certified devices started to appear.