{"product_id":"hlk-ld2402-24ghz-millimeter-wave-aiot-sensor-gpio-uart","title":"HLK-LD2402 24GHz Millimeter Wave AIoT Sensor GPIO UART","description":"\u003ch2\u003eHLK-LD2402 24GHz Millimeter Wave AIoT Radar Sensor\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eHLK-LD2402\u003c\/strong\u003e is a compact, high-performance \u003cstrong\u003e24GHz millimeter wave radar module\u003c\/strong\u003e designed for intelligent human presence detection in smart home, AIoT, and automation applications. Measuring just \u003cstrong\u003e20 × 20mm\u003c\/strong\u003e and housed in a durable metal enclosure, this tiny powerhouse integrates seamlessly into embedded projects, smart devices, and IoT systems.\u003c\/p\u003e\n\n\u003cp\u003eUsing \u003cstrong\u003eFMCW (Frequency Modulated Continuous Wave)\u003c\/strong\u003e radar technology, the LD2402 can accurately detect human targets within a defined space — distinguishing between stationary and moving occupants with impressive reliability. With built-in \u003cstrong\u003eGPIO and UART interfaces\u003c\/strong\u003e, it connects easily to popular microcontrollers, development boards, and single-board computers for rapid prototyping and production deployment.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e24GHz Millimeter Wave Radar:\u003c\/strong\u003e Advanced FMCW technology for accurate, non-contact human presence sensing\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAIoT Ready:\u003c\/strong\u003e Designed for seamless integration into smart home and IoT automation systems\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual Interface Support:\u003c\/strong\u003e GPIO and UART interfaces for flexible connectivity with microcontrollers and SBCs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUltra-Compact Form Factor:\u003c\/strong\u003e Just 20 × 20mm — fits into space-constrained enclosures and PCB designs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Metal Construction:\u003c\/strong\u003e Robust build quality for reliable, long-term use\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHuman State Perception:\u003c\/strong\u003e Detects both stationary and moving human targets within a set detection zone\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow Power Consumption:\u003c\/strong\u003e Ideal for battery-powered and energy-conscious AIoT deployments\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAvailable in 2 Color Options:\u003c\/strong\u003e Choose the finish that suits your project aesthetic\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e HLK-LD2402\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrequency:\u003c\/strong\u003e 24GHz\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDetection Technology:\u003c\/strong\u003e FMCW Millimeter Wave Radar\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 20 × 20mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Metal\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInterfaces:\u003c\/strong\u003e GPIO, UART\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Human presence detection, smart home, AIoT automation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × HLK-LD2402 AIoT Millimeter Wave Sensor Module\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIdeal For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSmart home automation and occupancy sensing\u003c\/li\u003e\n  \u003cli\u003eAIoT development projects and prototyping\u003c\/li\u003e\n  \u003cli\u003eSecurity and monitoring systems\u003c\/li\u003e\n  \u003cli\u003eLighting control and energy management triggers\u003c\/li\u003e\n  \u003cli\u003eEmbedded systems and IoT device integration\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor more information on millimeter wave radar technology and its applications in smart sensing, visit the National Institute of Standards and Technology (NIST) — Electromagnetic Metrology.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What is the HLK-LD2402 millimeter wave sensor and what does it do?\u003c\/h4\u003e\n\u003cp\u003eA: The HLK-LD2402 is a 24GHz FMCW millimeter wave radar module engineered for intelligent human presence detection. It uses frequency modulated continuous wave technology to sense human targets — both stationary and moving — within a defined space, making it ideal for smart home automation, AIoT systems, and occupancy-triggered controls.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What interfaces does the HLK-LD2402 support for connectivity?\u003c\/h4\u003e\n\u003cp\u003eA: The HLK-LD2402 is equipped with both GPIO and UART interfaces, enabling easy integration with a wide range of microcontrollers, development boards (such as Arduino, ESP32, Raspberry Pi), and embedded systems. This dual-interface design ensures flexible deployment across various AIoT and automation projects.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How compact is the HLK-LD2402 sensor module?\u003c\/h4\u003e\n\u003cp\u003eA: The HLK-LD2402 features an ultra-compact footprint of just 20 × 20mm with a durable metal housing. This makes it an excellent choice for space-constrained enclosures, custom PCB designs, and any application where a small, reliable radar sensor is needed.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What detection technology does the HLK-LD2402 use?\u003c\/h4\u003e\n\u003cp\u003eA: It uses FMCW (Frequency Modulated Continuous Wave) radar operating at 24GHz. This technology allows the module to accurately detect the presence and state of human occupants within a set detection zone — even when the target is relatively still — providing more reliable occupancy sensing than passive infrared (PIR) alternatives.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What is the HLK-LD2402 millimeter wave sensor and what does it do?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The HLK-LD2402 is a 24GHz FMCW millimeter wave radar module engineered for intelligent human presence detection. It uses frequency modulated continuous wave technology to sense human targets — both stationary and moving — within a defined space, making it ideal for smart home automation, AIoT systems, and occupancy-triggered controls.\"}}, {\"@type\": \"Question\", \"name\": \"What interfaces does the HLK-LD2402 support for connectivity?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The HLK-LD2402 is equipped with both GPIO and UART interfaces, enabling easy integration with a wide range of microcontrollers, development boards (such as Arduino, ESP32, Raspberry Pi), and embedded systems. This dual-interface design ensures flexible deployment across various AIoT and automation projects.\"}}, {\"@type\": \"Question\", \"name\": \"How compact is the HLK-LD2402 sensor module?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The HLK-LD2402 features an ultra-compact footprint of just 20 × 20mm with a durable metal housing. This makes it an excellent choice for space-constrained enclosures, custom PCB designs, and any application where a small, reliable radar sensor is needed.\"}}, {\"@type\": \"Question\", \"name\": \"What detection technology does the HLK-LD2402 use?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"It uses FMCW (Frequency Modulated Continuous Wave) radar operating at 24GHz. This technology allows the module to accurately detect the presence and state of human occupants within a set detection zone — even when the target is relatively still — providing more reliable occupancy sensing than passive infrared (PIR) alternatives.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/vpggdm-rp.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Tech, Tools \u0026 Auto\", \"item\": \"https:\/\/vpggdm-rp.myshopify.com\/collections\/tech-tools-auto\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"HLK-LD2402 24GHz Millimeter Wave AIoT Sensor GPIO UART\", \"item\": \"https:\/\/vpggdm-rp.myshopify.com\/products\/hlk-ld2402-24ghz-millimeter-wave-aiot-sensor-gpio-uart\"}]}\u003c\/script\u003e","brand":"Qme","offers":[{"title":"A2","offer_id":49766519701718,"sku":"14:29#A2","price":20.54,"currency_code":"USD","in_stock":true},{"title":"A1","offer_id":49766519734486,"sku":"14:10#A1","price":20.54,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0827\/5243\/8486\/files\/S749b291e5d1f463b9c9658354de527dbf.webp?v=1785330770","url":"https:\/\/qmeboost.com\/products\/hlk-ld2402-24ghz-millimeter-wave-aiot-sensor-gpio-uart","provider":"Qme","version":"1.0","type":"link"}