Third,
the algorithm also records a log file with the data in a solid
state memory 24FC1025 (Microchip Technologies, Chandler,
AZ) with a capacity of 128 kB. Each log is 12-B long,
including soil moisture and temperature, the battery voltage,
the WSU ID, the date, and time generated by the internal
RTCC. If irrigation is provided, the program also stores a
register with the duration of irrigation, the date, and time.