{"product_id":"jdy-40-2-4g-wireless-serial-ttl-transceiver-module","title":"JDY-40 2.4G Wireless TTL Serial Transceiver Module – 120m Range","description":"\u003ch2\u003eJDY-40 2.4G Wireless Serial Port Transceiver \u0026amp; Remote Communication Module\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eJDY-40 2.4G Wireless Serial TTL Module\u003c\/strong\u003e is a compact, easy-to-integrate DIY electronic module designed for makers, engineers, and hobbyists who need reliable short-range wireless serial communication. Built on 2.4GHz technology, it delivers a transmission range of up to \u003cstrong\u003e120 meters\u003c\/strong\u003e with a standard TTL serial interface — so integration into your existing project is fast and straightforward. If you already know how to work with a serial port, you're ready to deploy the JDY-40.\u003c\/p\u003e\n\n\u003cp\u003eMade in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2.4GHz Frequency Band\u003c\/strong\u003e — Stable, widely-supported wireless frequency for DIY and industrial applications\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUp to 120-Meter Transmission Range\u003c\/strong\u003e — Ideal for room-to-room, floor-to-floor, or outdoor short-range projects\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandard TTL Serial Interface\u003c\/strong\u003e — Plug into any microcontroller, Arduino, Raspberry Pi, or UART-enabled device with ease\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUltra-Low Sleep Current (5µA)\u003c\/strong\u003e — Battery-friendly design for low-power and IoT applications\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMax Transmission Power: 12dBm\u003c\/strong\u003e — Strong signal output for dependable wireless links\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Operating Temperature: -40°C to 80°C\u003c\/strong\u003e — Suitable for both indoor and demanding outdoor environments\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact Size: 23.2 × 13.8mm\u003c\/strong\u003e — Fits into tight PCB layouts and enclosures without trouble\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlastic + Metal Construction\u003c\/strong\u003e — Durable everyday build quality\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFull Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWorking Frequency Band\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2.4GHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTransmission Power\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMax 12dBm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eReceiver Sensitivity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-97dBm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTransmission Distance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUp to 120 meters\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWorking Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2.2V – 3.6V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTX Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e40mA\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRX Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e24mA\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSleep Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5µA\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCommunication Interface\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStandard TTL Serial Port\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-40°C to 80°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePlastic + Metal\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e23.2 × 13.8mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePackage Contents\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 × JDY-40 Module\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eApplication Scenarios\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2.4G panel switches and button controls\u003c\/li\u003e\n  \u003cli\u003e2.4G remote controllers\u003c\/li\u003e\n  \u003cli\u003eTransparent data transmission between devices\u003c\/li\u003e\n  \u003cli\u003eOne-to-many device control via smartphone\u003c\/li\u003e\n  \u003cli\u003eIO switching and digital control systems\u003c\/li\u003e\n  \u003cli\u003e2.4G wireless toys and RC devices\u003c\/li\u003e\n  \u003cli\u003eSmart home automation systems\u003c\/li\u003e\n  \u003cli\u003eIndustrial automation and sensor networks\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.energystar.gov\/products\" target=\"_blank\" rel=\"noopener\"\u003eENERGY STAR product efficiency guidance\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What microcontrollers is the JDY-40 2.4G wireless module compatible with?\u003c\/h4\u003e\n\u003cp\u003eA: The JDY-40 uses a standard TTL serial (UART) interface, making it compatible with virtually any microcontroller that supports serial communication — including Arduino, ESP8266, ESP32, Raspberry Pi, STM32, and similar platforms. No special library is required; simply connect TX\/RX pins and communicate via your standard serial port.\u003c\/p\u003e\n\u003ch4\u003eQ: What is the effective wireless transmission range of the JDY-40 module?\u003c\/h4\u003e\n\u003cp\u003eA: The JDY-40 2.4G wireless serial module supports a transmission distance of up to 120 meters in open-air conditions. Range may vary depending on obstacles, interference, and the environment in which it is deployed.\u003c\/p\u003e\n\u003ch4\u003eQ: Can the JDY-40 be used for battery-powered or low-power IoT projects?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The JDY-40 features an ultra-low sleep current of just 5µA, making it an excellent choice for battery-operated wireless projects, IoT sensor nodes, and any application where minimizing power consumption is a priority.\u003c\/p\u003e\n\u003ch4\u003eQ: What voltage does the JDY-40 2.4G transceiver module operate at?\u003c\/h4\u003e\n\u003cp\u003eA: The JDY-40 operates at a working voltage of 2.2V to 3.6V. It is a 3.3V logic-level device. If connecting to a 5V microcontroller (such as a standard Arduino Uno), a logic level converter is recommended to protect the module.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What microcontrollers is the JDY-40 2.4G wireless module compatible with?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The JDY-40 uses a standard TTL serial (UART) interface, making it compatible with virtually any microcontroller that supports serial communication — including Arduino, ESP8266, ESP32, Raspberry Pi, STM32, and similar platforms. 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