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Farmers generally do not know the amount of water needed by plants. Sometimes they also do not have enough time to water the plants regularly. Merauke Regency has a very strict climate between the rainy season and the dry season. During a prolonged summer can cause plants to experience drought due to lack of water. So, it is necessary to design an automatic plant sprinkler based on soil moisture around the plant. This study designed an automatic chili and tomato sprinkler based on Arduino Mega 2560 in Wasur II Village. The microcontroller used is Arduino mega 2560, soil moisture sensor YL-69, relay, water pump and sensor probe. 3 pairs of 20 cm soil moisture sensors will be connected in series, then plugged into the ground 15 cm deep. As a result, the tool performs watering (relay on) when the soil moisture in chili plants is below 75% and on tomato plants is below 70%. Furthermore, when the soil moisture in chili plants reaches 75.86%, the soil resistance value obtained is 34.58 ohms. Then when the soil moisture in tomato plants reaches 70.19%, the soil resistance value obtained is 42.70 ohms.

Design of Automatic Chili and Tomato Sprinklers Based on Arduino Mega 2560