Journal
SENSORS
Volume 11, Issue 1, Pages 329-340Publisher
MDPI
DOI: 10.3390/s110100329
Keywords
wireless sensor networks; actuator node; autonomous sensor; solar energy; agriculture irrigation systems
Funding
- Generalitat Valenciana [GV05/043]
- Vicerecorate of Investigation, Development and Innovation of Universidad Politecnica de Valencia [PAID-06-06-002-61, PAID-10-11]
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The design of a fully autonomous and wireless actuator node (wEcoValve mote) based on the IEEE 802.15.4 standard is presented. The system allows remote control (open/close) of a 3-lead magnetic latch solenoid, commonly used in drip irrigation systems in applications such as agricultural areas, greenhouses, gardens, etc. The very low power consumption of the system in conjunction with the low power consumption of the valve, only when switching positions, allows the system to be solar powered, thus eliminating the need of wires and facilitating its deployment. By using supercapacitors recharged from a specifically designed solar power module, the need to replace batteries is also eliminated and the system is completely autonomous and maintenance free. The wEcoValve mote firmware is based on a synchronous protocol that allows a bidirectional communication with a latency optimized for real-time work, with a synchronization time between nodes of 4 s, thus achieving a power consumption average of 2.9 mW.
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