Calibration of Passive UHF RFID Tags Using Neural Networks to Measure Soil Moisture

Figure 3

Possible setup for manual data collection, using a portable handheld reader (4) attached to a mobile device (8). RFID tags (1) under the soil (2) surface (3) can be found by a mobile device (8) using a map on its screen (9). The device, such as tablet or smartphone, uses its GPS to store the installation coordinates of each tag and, later, show the sensor localization to the operator.