{"product_id":"5-10pcs-soil-moisture-hygrometer-detection-humidity-sensor-module-for-arduino-development-board-diy-robot-smart-car","title":"Soil Moisture Sensor","description":"\u003cdiv\u003e\n\u003ch2\u003eCompact Dual-Output Soil Moisture Sensor Module\u003c\/h2\u003e\n\u003cp\u003eMeet the compact, versatile soil moisture hygrometer module designed to empower Arduino projects, DIY robots, and smart irrigation systems. Powered by an LM393 comparator, this board delivers reliable readings with two output options—digital and analog—so you can implement both simple on\/off watering and nuanced moisture control across multiple zones.\u003c\/p\u003e \u003ch3\u003eKey features that set it apart\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eDual outputs for flexibility\u003c\/strong\u003e — use the digital DO signal for straightforward on\/off decisions or the analog AO output for continuous moisture readings, enabling both threshold-based irrigation and precise soil sensing within the same module.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAdjustable sensitivity\u003c\/strong\u003e — a blue potentiometer lets you tailor the moisture threshold to your soil type and plants, whether you’re in sandy loam or dense clay.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBroad voltage compatibility\u003c\/strong\u003e — operates from 3.3V to 5V, making it compatible with a wide range of microcontrollers and development boards, including popular Arduino setups.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCompact, sturdy design\u003c\/strong\u003e — a small PCB (approximately 3 cm × 1.6 cm) with fixed bolt holes for quick, secure installation in pots, planter boxes, or robot chassis.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVisual indicators\u003c\/strong\u003e — red power indicator and a green digital output indicator provide quick, at-a-glance status during prototyping and testing.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eReliable sensing\u003c\/strong\u003e — LM393 comparator-based stability for dependable readings as soil moisture changes, even in fluctuating conditions.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFlexible pack options\u003c\/strong\u003e — available in 5- or 10-piece assortments to outfit multiple planting zones or multiple project iterations without frequent reorders.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eAutomated irrigation for pots, raised beds, and small gardens — trigger watering only when moisture falls below your chosen threshold.\u003c\/li\u003e \u003cli\u003eArduino projects and DIY robotics where soil sensing informs decisions — for example, a smart rover that waters plants as it moves.\u003c\/li\u003e \u003cli\u003eEducational kits and STEM experiments demonstrating sensor integration, analog vs digital signals, and threshold-based control.\u003c\/li\u003e \u003cli\u003eGreenhouse or terrarium setups requiring consistent moisture management without constant monitoring.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWiring, calibration, and practical use\u003c\/h3\u003e\n\u003cp\u003eConnect the module to your microcontroller as follows: \u003cstrong\u003eVCC\u003c\/strong\u003e to 3.3V–5V, \u003cstrong\u003eGND\u003c\/strong\u003e to ground. Use the \u003cstrong\u003eDO\u003c\/strong\u003e output for a digital signal (high\/low) and the \u003cstrong\u003eAO\u003c\/strong\u003e output for an analog moisture value. Turn the blue potentiometer to set the moisture threshold for the digital output; as soil dries or wets, the DO signal will switch accordingly. Read the AO output with an ADC-capable input to capture precise moisture levels and translate those readings into watering actions in your code.\u003c\/p\u003e \u003cp\u003eTip: The compact form factor with fixed bolt holes makes installation in pots, planter boxes, or robot chassis quick and repeatable, while the built-in indicators simplify debugging during development and testing.\u003c\/p\u003e \u003cimg class=\"detail-desc-decorate-image\" src=\"https:\/\/ae01.alicdn.com\/kf\/S1e4b0ed1179749ef91b8f04ebcd1ec220.jpg\" slate-data-type=\"image\"\u003e\n\u003cimg class=\"detail-desc-decorate-image\" src=\"https:\/\/ae01.alicdn.com\/kf\/S14b85c096bd54b1a883d992cee2a3343o.jpg\" slate-data-type=\"image\"\u003e\n\u003cimg class=\"detail-desc-decorate-image\" src=\"https:\/\/ae01.alicdn.com\/kf\/Sb27988fbf5dd4dee8ae358f36d118c5bU.jpg\" slate-data-type=\"image\"\u003e\n\u003cimg class=\"detail-desc-decorate-image\" src=\"https:\/\/ae01.alicdn.com\/kf\/S515859d0d6a14c668d992b607d568e14n.jpg\" slate-data-type=\"image\"\u003e\n\u003cimg class=\"detail-desc-decorate-image\" src=\"https:\/\/ae01.alicdn.com\/kf\/Sbfeb0129febf4125977eccaa5cbae763g.jpg\" slate-data-type=\"image\"\u003e\n\u003c\/div\u003e","brand":"Electronics","offers":[{"title":"10pcs","offer_id":56791761256796,"sku":"14:29#10pcs","price":10.0,"currency_code":"GBP","in_stock":true},{"title":"5pcs","offer_id":56791761289564,"sku":"14:10#5pcs","price":5.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1000\/2042\/0956\/files\/S1e4b0ed1179749ef91b8f04ebcd1ec220.webp?v=1771736864","url":"https:\/\/robotbuilder.co\/products\/5-10pcs-soil-moisture-hygrometer-detection-humidity-sensor-module-for-arduino-development-board-diy-robot-smart-car","provider":"Electronics","version":"1.0","type":"link"}