- In this paper, design and development of the watering cassava crop systems using solar energy by control through smartphone for community in Kampang Phet, Thailand. That was present the structure of the system prototype used Arduino Uno board to control the operation of the system and connect with wireless network via Wi-Fi module. The design and development of the prototype watering cassava crop system with controlled via smartphones and wrote program command code for control systems by using blynk applications. This research studied the experiment of temperature, humidity and soil moisture by control through smartphone. From the measurements results of the watering cassava crop systems by using solar through smartphone were average ambient temperature of 36C°, average ambient humidity of 65% and average soil moisture of 56%, respectively. The watering systems open for cassava plant used average time of 96 hours per session and the system will work to water an average of every 4 days, which can save water for about 3 days. The average satisfaction at 4.56 was the best level from watering systems users. Moreover, the watering cassava plants system can control via smartphones can well. Therefore, the watering system can apply for the community sustainably.

Keywords : Arduino UNO; Cassava Crop; Watering Systems, Solar Cell, Blynk Apps