1. Introduction
The EBYTE E49-400T20D is an ultra-high cost-effective wireless module designed for reliable and long-range data transmission. It operates in the 410-510MHz frequency band, offering a maximum transmit power of 20dBm (100mW) and a communication distance of up to 2.5km. This module is suitable for a wide range of industrial-grade applications, ensuring robust performance and consistency.
Figure 1: EBYTE E49-400T20D Wireless Module with SMA antenna interface.
2. Features
- Measured communication distance up to 2.5km.
- Maximum transmit power of 100mW (20dBm), software adjustable at multiple levels.
- Utilizes the global license-free ISM 433MHz frequency band.
- Data transmission rate: 1.2Kbps to 200Kbps.
- Low power consumption mode, ideal for battery-powered applications.
- GFSK modulation for reliable data transfer.
- Operating voltage range: 2.6V to 3.3V.
- Industrial-grade standard design for long-term use in temperatures from -40°C to 85°C.
- SMA antenna interface for easy connection.
- Data encryption function for enhanced security and reduced interference.
3. Specifications
Figure 2: Main technical parameters of the E49-400T20D module.
| Parameter | Description |
|---|---|
| Product Size | 36mm * 21mm |
| Antenna | SMA |
| Working Frequency | 410~510MHz |
| Max Tx Power (dBm) | 20.0dBm |
| Reference Distance | 2.5km |
| Operating Voltage | 2.6V~5.5V |
| Communication Interface | UART |
| Receiving Sensitivity | -116~-117kbps |
| Sleep Current | 0.7µA |
Figure 3: Dimensions of the E49-400T20D module (36mm x 21mm).
4. Setup
To set up the E49-400T20D wireless module, follow these general guidelines:
- Power Supply: Connect the module to a stable power supply within the 2.6V to 3.3V range. Ensure correct polarity to prevent damage.
- Antenna Connection: Attach a compatible 433MHz/470MHz SMA antenna to the module's SMA interface. A properly connected antenna is crucial for optimal performance.
- UART Connection: Connect the module's UART pins (TX, RX, GND) to your microcontroller or host device. Ensure the baud rate and other serial communication parameters are correctly configured on both ends.
- Configuration: Refer to the module's detailed datasheet for specific register configurations, including setting the desired operating mode, transmission power, and data rate.
5. Operating Modes
The E49-400T20D module features four distinct operating modes, each optimized for different application scenarios. These modes allow for flexibility in balancing power consumption, transmission speed, and range. Users can configure the module to select the most suitable mode for their specific needs.
The module supports configurable air data speeds, ranging from 1.2Kbps to 200Kbps. Higher air data speeds result in faster data transmission and shorter transmission delays, while lower speeds can achieve longer transmission distances.
Figure 4: Illustration of configurable air data speeds (1.2kbps, 2.4kbps, 200kbps).
6. Maintenance
To ensure the longevity and optimal performance of your E49-400T20D module, adhere to the following maintenance guidelines:
- Environmental Conditions: Operate the module within its specified industrial-grade temperature range of -40°C to 85°C. Avoid exposure to extreme temperatures, high humidity, or corrosive environments.
- Handling: Handle the module with care to prevent physical damage. Avoid static discharge by using appropriate ESD precautions when handling.
- Cleaning: If necessary, gently clean the module's exterior with a dry, soft cloth. Do not use liquid cleaners or solvents.
- Antenna Care: Ensure the antenna connection is secure and the antenna itself is not damaged. A damaged antenna can significantly reduce performance.
Figure 5: The module is designed for long-term use in temperatures from -40°C to 85°C.
7. Troubleshooting
If you encounter issues with your E49-400T20D module, consider the following troubleshooting steps:
- No Communication:
- Verify power supply voltage and polarity.
- Check UART connections (TX to RX, RX to TX) and ensure correct baud rate settings.
- Confirm that the module is in an active operating mode and not in a low-power sleep state.
- Poor Range or Signal Strength:
- Ensure the antenna is securely connected and undamaged.
- Check for obstructions between modules (e.g., walls, metal objects).
- Verify that the transmit power is set to the desired level (e.g., 20dBm for maximum range).
- Consider environmental interference from other RF devices.
- Module Not Responding:
- Perform a power cycle (turn off and on) to reset the module.
- Recheck all wiring connections.
8. Applications
The EBYTE E49-400T20D module is versatile and suitable for a wide array of IoT and industrial applications, including but not limited to:
- Wearable devices
- Smart home and industrial sensors
- Security systems and positioning systems
- Wireless remote control and unmanned drones
- Wireless game remote controls
- Healthcare products
- Wireless voice communication and wireless headsets
- Automotive industry applications
Figure 6: Various IoT application scenarios for EBYTE products, including smart home, remote control, access control, and security systems.
9. Warranty and Support
For warranty information, technical support, or further inquiries regarding the EBYTE E49-400T20D module, please contact the manufacturer directly. EBYTE products undergo rigorous testing to ensure industrial reliability and batch consistency.
Manufacturer: Chengdu Ebyte Electronic Technology Co. Ltd.
Website: www.cdebyte.com
EU Representative: evalmaster Consulting GmbH
Figure 7: Product packaging displaying manufacturer and EU representative information.
