Abstract
Aims: To simulate and construct a solar powered smart irrigation system using Blynk Mobile App.
 Study Design: Experimental design through simulation studies and internet of things.
 Place and Duration of Study: Department of Physics, Nasarawa State University Keffi, Nigeria, between July 2021 and March 2022.
 Methodology: The system was simulated using Proteus ISIS Version 8.6. It consists of two main units that is transmitter and receiver. The transmitter consists of a sensor circuit that senses the soil moisture, humidity and temperature. Then the Node MCU microcontroller collects the data and sent to the Blynk Mobile App (Receiver). The circuit was tested at two different conditions of the soil; Wet soil and Dry soil.
 Results: Output performance analysis when the water level in soil (Moisture) was high, indicated Temperature value 28.3°C, Humidity 72%, and the Pump was OFF. When the water level in soil was mild, temperature was 60°C, Humidity 68%, and pump was turned ON. The pump is activated to switch ON as far as the water reservoir is having enough water and will switch OFF when the required level of moisture in the soil is achieved. The solar power ensured constant power supply, while the Blynk Mobile App ensured real time data monitoring by the Farmer even when he is far away from the farm.
 Conclusion: This system is an improve irrigation system that supports low water and electricity consumption as well as efficient monitoring for increase farmers’ output.
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