JDY-41 Wireless 2.4G Serial Port Module

JDY-41 Wireless 2.4G Serial Port Module is a highly efficient transceiver designed to replace traditional wired serial connections with a reliable 2.4 GHz wireless link. This module operates on the global 2.4G ISM band, ensuring robust data transmission over distances up to 160 meters in open environments. Consequently, engineers can effortlessly add wireless communication to microcontrollers, robotics, and remote sensors without writing complex networking code. Furthermore, its transparent serial pass-through capability allows the device to act as a direct drop-in replacement for standard UART cables. Therefore, you should select the JDY-41 for projects requiring simple, high-speed, and point-to-point wireless data exchange.

Key Features:

• Transparent Serial Communication: The module passes UART data wirelessly without requiring AT command processing during active transmission, simplifying integration.
• Extended Range: Utilizing an optimized RF design, it achieves up to 160 meters of line-of-sight communication.
• Low Power Consumption: Additionally, the integrated power-saving features significantly reduce current draw for battery-operated devices.
• Configurable Parameters: Users can easily modify the baud rate, channel, and device ID via simple AT commands when the module sits in configuration mode.
• Built-In PCB Antenna: The embedded antenna eliminates the need for external RF hardware, saving valuable board space.

Technical Specifications:

• Operating Frequency: 2.4 GHz ISM Band
• Transmit Power: Maximum 12 dBm
• Receiver Sensitivity: −96 dBm
• Operating Voltage: 2.2 V to 3.6 V DC (3.3 V Recommended)
• Communication Interface: Standard UART (TTL level)
• Default Baud Rate: 9600 bps (Adjustable up to 115200 bps)
• Operating Current: ≈ 40 mA during active transmission

Mechanical Specifications:

• Form Factor: Castellated edge module for surface mount or through-hole header soldering
• Antenna Type: Integrated meander PCB antenna
• Board Material: FR-4 Glass Epoxy
• Durability: Withstands standard industrial vibration and temperature variations.

Dimensions:

• Body Length: ≈ 24.0 mm
• Body Width: ≈ 15.0 mm
• Body Thickness: ≈ 2.0 mm (excluding headers)
• Pin Pitch: 2.54 mm (Standard 0.1 inch spacing)

Pinout and Wiring:

• VCC: Connect this pin to a clean 3.3 V power supply.
• GND: Connect this pin to the common circuit ground.
• TXD: Connect this transmit pin to the RX pin of your host microcontroller.
• RXD: Connect this receive pin to the TX pin of your host microcontroller.
• CS: Chip Select pin. Pull this pin low to enable the module.
• SET: Configuration pin. Pull this pin low to enter AT command mode; otherwise, leave it floating or high for normal data transmission.

Datasheet Reference:

• Download SBC-JDY-41 Wireless Serial Module Manual

Commonly Used in:

• Arduino Projects: Quickly replacing wired serial cables between two Arduino boards.
• Custom Remote Controls: Building wireless joysticks and control pads for robotics.
• Sensor Nodes: Sending periodic telemetry data from remote environmental sensors to a central hub.

Applications:

• Wireless Telemetry: Streaming real-time data from drones, vehicles, or industrial machines to a monitoring station.
• Smart Home Automation: Passing control signals between decentralized smart appliances.
• Industrial Control: Establishing localized, point-to-point wireless links in noisy environments where running cables proves difficult.

Equivalent Models:

• HC-12: A popular 433 MHz alternative offering longer range but lower data rates.
• NRF24L01: Uses the same 2.4 GHz band, however, it requires SPI communication rather than a simple UART interface.
• HC-05 / HC-06: Bluetooth serial modules that serve a similar transparent UART function, although limited by standard Bluetooth ranges.

Package Includes:

• 1 x JDY-41 Wireless 2.4G Serial Port Module