JDY-40 2.4G Wireless TTL Serial Transceiver Module – 120m Range
JDY-40 2.4G Wireless TTL Serial Transceiver Module – 120m Range
JDY-40 2.4G Wireless Serial Port Transceiver & Remote Communication Module
The JDY-40 2.4G Wireless Serial TTL Module 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 120 meters 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.
Made in Mainland China.
Key Features
- 2.4GHz Frequency Band — Stable, widely-supported wireless frequency for DIY and industrial applications
- Up to 120-Meter Transmission Range — Ideal for room-to-room, floor-to-floor, or outdoor short-range projects
- Standard TTL Serial Interface — Plug into any microcontroller, Arduino, Raspberry Pi, or UART-enabled device with ease
- Ultra-Low Sleep Current (5µA) — Battery-friendly design for low-power and IoT applications
- Max Transmission Power: 12dBm — Strong signal output for dependable wireless links
- Wide Operating Temperature: -40°C to 80°C — Suitable for both indoor and demanding outdoor environments
- Compact Size: 23.2 × 13.8mm — Fits into tight PCB layouts and enclosures without trouble
- Plastic + Metal Construction — Durable everyday build quality
Full Specifications
| Working Frequency Band | 2.4GHz |
| Transmission Power | Max 12dBm |
| Receiver Sensitivity | -97dBm |
| Transmission Distance | Up to 120 meters |
| Working Voltage | 2.2V – 3.6V |
| TX Current | 40mA |
| RX Current | 24mA |
| Sleep Current | 5µA |
| Communication Interface | Standard TTL Serial Port |
| Operating Temperature | -40°C to 80°C |
| Material | Plastic + Metal |
| Dimensions | 23.2 × 13.8mm |
| Package Contents | 1 × JDY-40 Module |
Application Scenarios
- 2.4G panel switches and button controls
- 2.4G remote controllers
- Transparent data transmission between devices
- One-to-many device control via smartphone
- IO switching and digital control systems
- 2.4G wireless toys and RC devices
- Smart home automation systems
- Industrial automation and sensor networks
Learn more: ENERGY STAR product efficiency guidance
Frequently Asked Questions
Q: What microcontrollers is the JDY-40 2.4G wireless module compatible with?
A: 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.
Q: What is the effective wireless transmission range of the JDY-40 module?
A: 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.
Q: Can the JDY-40 be used for battery-powered or low-power IoT projects?
A: 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.
Q: What voltage does the JDY-40 2.4G transceiver module operate at?
A: 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.
Production & Packaging Notice
To 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.