1. Introduction
The REYAX RYLR498 transceiver module features a LoRa long-range modem, providing ultra-long-range spread spectrum communication and high interference immunity. It is designed to minimize current consumption, making it suitable for various low-power applications.
2. Features
- Integrated NUVOTON MCU & Semtech LoRa Engine
- Excellent blocking immunity for reliable communication
- Smart receiving power saving mode for optimized energy consumption
- High sensitivity for extended range
- Easy control via AT commands
- Built-in antenna for compact design
3. Applications
The RYLR498 module is versatile and can be used in a wide range of applications, including:
- IoT (Internet of Things) Applications
- Mobile Equipment
- Home Security Systems
- Industrial Monitoring and Control Equipment
4. Specifications
The following table details the electrical and operational specifications of the RYLR498 module:
| Item | Min | Typical | Max | Unit | Condition |
|---|---|---|---|---|---|
| VDD power supply | 2.3 | 3.3 | 3.6 | V | VDD |
| RF Output power range | 0 | 22 | dBm | ||
| Filter insertion loss | 1 | 2 | 3 | dB | |
| RF Sensitivity | -129 | dBm | |||
| RF Input level | 10 | dBm | |||
| Frequency range | 390 | 490 | 525 | MHz | |
| Frequency accuracy | ±10 | ppm | |||
| Transmit Mode current | 140 | mA | @RFOP = +22dBm | ||
| Receive Mode current | 17.5 | mA | @VDD=3.3V | ||
| Sleep mode current | 10 | uA | AT+MODE=1 @VDD=3.3V | ||
| Smart receiving power saving mode average current | 0.06 | 2.65 | 5.5 | mA | 2.65mA @AT+MODE=2,1000,1000 If you need lower current consumption, you can adjust the AT+MODE=2 time duty. |
| Baud rate | 300 | 115200 | 115200 | bps | 8, N, 1 |
| Digital Input Level High | 0.8*VDD | VDD | V | VIH | |
| Digital Input Level Low | 0 | 0.1 | V | VIL | |
| Digital Output Level High | 0.8*VDD | VDD | V | VOH | |
| Digital Output Level Low | 0.1 | V | VOL | ||
| Cycling (erase / write) | 200 | k | Cycles | ||
| Flash data memory | 2 | ||||
| Weight | 8 | ||||
| Operating temperature | -40 | 25 | +85 | °C |
For detailed mechanical dimensions, refer to Figure 3.
5. Setup and Installation
5.1 Block Diagram
The RYLR498 module integrates a NUVOTON MCU and a Semtech LoRa Engine, connecting to an external processor via GPIO and UART. The RF signal path includes a filter and switch before reaching the antenna.
5.2 Pin Description
The RYLR498 module features a standard pin header for easy integration. The pin assignments are as follows:
| Pin | Name | I/O | Condition |
|---|---|---|---|
| 1 | VDD | I | Power Supply |
| 2 | NRST | I | RESET (Active Low) 100KΩ Internal pull up, Pull down at least 100ms |
| 3 | RXD | I | UART Data Input |
| 4 | TXD | O | UART Data Output |
| 5 | GND | - | Ground |
5.3 Application Schematic
The module can be integrated into your system using the following typical application schematic. Ensure proper power supply filtering and UART connections.
The module also supports an external antenna via an I-PEX MHF4 connector slot, as shown in Figure 5, if the built-in antenna is not suitable for your application.
6. Operating Instructions
The RYLR498 module is controlled via AT commands through its UART interface. Ensure your host microcontroller or system is configured to communicate at the specified baud rate (default 115200 bps, 8, N, 1).
6.1 Timing Diagram
The timing diagram illustrates the signal behavior during power-on, power-off, and transmit/receive operations.
6.2 Smart Receiving Power Saving Mode
To optimize power consumption, the module features a Smart Receiving Power Saving Mode. To enter this mode, send the AT command: AT+MODE=2,<RX time>,<Low speed time>.
- Upon receiving this command, the RF Reception will operate according to the specified
<RX time>and<Low speed time>parameters. - When RF Transmission occurs during the
<RX time>, the data will be decoded and output on the UART TXD interface. - The RYLR498 will return to
+MODE=0(normal operation) at the same time. - To re-enter Smart Receiving Power Saving Mode, the
AT+MODE=2,<RX time>,<Low speed time>command must be re-executed.
6.3 Power Consumption Tests
The following tables provide data on transmit power consumption and smart receiving power saving mode current tests.
6.4 Data Latency Time Test
The data latency time is the time difference between the UART RXD receiving the AT+SEND command and the UART TXD outputting +RCV data.
7. Maintenance
The REYAX RYLR498 module is designed for robust and maintenance-free operation. However, to ensure optimal performance and longevity:
- Environmental Conditions: Operate the module within the specified operating temperature range (-40°C to +85°C) and avoid excessive humidity or corrosive environments.
- Physical Inspection: Periodically inspect the module for any signs of physical damage, loose connections, or corrosion.
- Cleaning: If necessary, gently clean the module with a dry, soft cloth. Avoid using liquids or harsh chemicals.
- Firmware Updates: Check the manufacturer's website for any available firmware updates that may improve performance or add new features. Follow the provided instructions carefully for any update procedures.
8. Troubleshooting
If you encounter issues with your RYLR498 module, consider the following troubleshooting steps:
- No Communication via UART:
- Verify power supply (VDD) is within the specified range (2.3V to 3.6V).
- Check UART wiring (TXD to RXD, RXD to TXD, GND to GND).
- Ensure correct baud rate (115200 bps), data bits (8), parity (None), and stop bits (1) are configured on your host device.
- Confirm the module is not in sleep mode (AT+MODE=1).
- Poor RF Performance/Range:
- Ensure the module's antenna is unobstructed and not near large metal objects.
- Verify the operating frequency is correctly configured via AT commands.
- Check for local interference sources.
- If using an external antenna, ensure it is correctly connected to the I-PEX MHF4 connector.
- High Current Consumption:
- Confirm the module is entering sleep mode (AT+MODE=1) or smart receiving power saving mode (AT+MODE=2) as expected.
- Check for continuous transmission or reception if not intended.
- Module Unresponsive:
- Try resetting the module by pulling the NRST pin low for at least 100ms.
- Power cycle the module.
9. User Tips
- Power Supply Stability: Always use a stable and clean power supply within the recommended voltage range to prevent unexpected behavior.
- AT Command Reference: Keep a comprehensive AT command reference handy for quick configuration and control.
- Antenna Placement: For optimal range and signal quality, ensure the antenna has a clear line of sight and is not shielded by other components or enclosures.
- Grounding: Proper grounding is crucial for stable operation and noise reduction. Ensure all GND pins are securely connected.
10. Warranty and Support
For warranty information, technical support, or further inquiries, please contact the manufacturer or your point of purchase. Ensure you have your product model (RYLR498) and any relevant purchase details available when seeking support.
Manufacturer Contact: sales@reyax.com
Website: http://reyax.com
