This paper details the implementation of a lowcost, open hardware, cloud-based intelligent farm automation system. Physical parameters such as soil moisture, temperature and humidity are measured by employing sensors sited across the monitored area. The parametric data is transmitted to the Atmel ATmega328P microcontroller from the sensors using Bluetooth Low Energy (BLE). The cloud performs real time intelligence operations based on periodic sensor inputs obtained from the farm and transmits control commands to the microcontroller. The novelty of the system lies in the use of BLE and in the intelligence provided by the cloud. The physically monitored, as well as virtually obtained parameters, at the cloud level allow intelligent command generation, facilitated by a data exchange system that leverages the existing telecom network prevalent in developing countries. Based on the cloud commands, the ATmega328P microcontroller controls the operation time period of the irrigation system thus conserving both water and energy. The approximate cost of implementing the proof of concept system elaborated in this paper by using off the shelf components at retail price is about USD 16. It is expected that the system cost will further reduce on mass production and commercialization.
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