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2.4G RFM98 LoRa Radio Node v1.0 Based on SX1278 433 MHz
The RFM98 LoRa Radio Node v1.0 is a high-performance long-range wireless communication module based on the Semtech SX1278 transceiver, operating at 433 MHz frequency band. This module is designed for IoT engineers, embedded systems developers, and wireless communication professionals who require reliable, low-power, long-distance data transmission over extended ranges up to 15 kilometers in open space. It solves the critical challenge of establishing secure, battery-efficient wireless connectivity for remote sensor networks, telemetry systems, and distributed IoT applications where traditional WiFi and cellular networks are impractical or cost-prohibitive.
Product Overview
The RFM98 LoRa Radio Node operates on LoRa (Long Range) spread spectrum modulation technology, which enables communication at extremely low power levels while maintaining exceptional range and interference immunity. The module utilizes the proven Semtech SX1278 chipset, a mature and widely-adopted transceiver that supports multiple spreading factors, bandwidth configurations, and coding rates. This flexibility allows engineers to optimize performance based on specific application requirements, trading off between range, data rate, and power consumption. The 433 MHz frequency band provides excellent propagation characteristics for both indoor and outdoor deployments, with superior wall penetration compared to higher frequency alternatives.
This v1.0 node implementation incorporates integrated antenna matching, crystal oscillator stability, and robust filtering to ensure reliable operation in noisy RF environments. The module supports both point-to-point and mesh networking topologies, making it ideal for scalable IoT deployments. With sleep current consumption in the microampere range and active transmission currents around 120 mA, the RFM98 enables battery-powered applications with multi-year operational lifespans. The compact form factor and standardized pinout facilitate rapid prototyping and integration into custom PCB designs, while the well-documented SX1278 architecture ensures compatibility with extensive software libraries and development frameworks.
Key Specifications
| Specification | Details |
| Product Type | LoRa Radio Transceiver Module |
| Chipset | Semtech SX1278 |
| Frequency Band | 433 MHz ISM Band |
| Modulation | LoRa Spread Spectrum |
| Output Power | 20 dBm (100 mW) maximum |
| Sensitivity | -139 dBm at SF12, BW125kHz |
| Range | Up to 15 km line-of-sight |
| Data Rate | 0.3 to 50 kbps |
| Spreading Factor | SF7 to SF12 configurable |
| Bandwidth | 7.8 kHz to 500 kHz selectable |
| Supply Voltage | 3.3V to 5V |
| Sleep Current | Less than 1 microampere |
| Transmit Current | 120 mA at 20 dBm |
| Receive Current | 12 mA typical |
| Interface | SPI serial interface |
| Operating Temperature | -40 to +85 degrees Celsius |
| Origin | Original/Authentic |
| Warranty | 7 days on manufacturing defects |
| Shipping | 1-5 days from Bengaluru |
| Delivery | 7-8 days across India |
| Support | 24/7 via Email and WhatsApp |
Key Features
- Extended Range Communication: Achieves up to 15 kilometers line-of-sight transmission using LoRa modulation with configurable spreading factors, enabling deployment across large geographical areas with minimal infrastructure
- Ultra-Low Power Consumption: Microampere-level sleep current and efficient receive/transmit modes allow battery-powered nodes to operate for months or years on standard alkaline or rechargeable batteries
- Flexible Configuration: Supports spreading factors SF7 through SF12, bandwidth selection from 7.8 kHz to 500 kHz, and multiple coding rates, enabling optimization for specific range and data rate requirements
- Robust Interference Immunity: LoRa spread spectrum technology provides superior rejection of narrowband interference and multipath fading, ensuring reliable operation in congested RF environments
- SPI Interface Compatibility: Standard serial peripheral interface enables seamless integration with Arduino, Raspberry Pi, STM32, and other microcontroller platforms using readily available libraries
- Integrated Antenna Matching: Built-in impedance matching and filtering circuits eliminate the need for external matching components, reducing design complexity and PCB footprint
Applications and Use Cases
- Remote Environmental Monitoring: Deploy sensor networks across agricultural fields, forests, and water bodies to collect temperature, humidity, soil moisture, and air quality data with minimal power requirements and extended wireless range
- Industrial IoT and Predictive Maintenance: Monitor equipment health, vibration, temperature, and operational parameters in factories and industrial facilities where WiFi coverage is unavailable or unreliable
- Smart Metering and Utility Management: Implement automatic meter reading systems for water, gas, and electricity consumption across distributed locations with secure, long-range wireless data collection
- Asset Tracking and Logistics: Track movement of valuable equipment, containers, and shipments across supply chains using low-power GPS-integrated nodes that report location periodically over extended distances
- Building Automation and Smart Cities: Create mesh networks for lighting control, HVAC monitoring, occupancy detection, and environmental sensing in large buildings and urban infrastructure applications
- Emergency Response and Disaster Recovery: Establish temporary communication networks in areas where cellular infrastructure is damaged, using battery-powered LoRa nodes for emergency alerts and situational awareness
How to Use
To begin using the RFM98 LoRa Radio Node, first establish the hardware connection between the module and your microcontroller via the SPI interface. Connect the DIO0 through DIO5 pins to corresponding GPIO pins on your microcontroller for interrupt handling and mode signaling. Ensure proper power supply decoupling with a 100 nanofarad ceramic capacitor placed as close as possible to the VCC pin, and connect the antenna to the ANT pin through a 50-ohm impedance-matched trace or connector. Configure the SPI clock frequency between 1 and 10 MHz and initialize the module by writing the appropriate register values to set your desired frequency, spreading factor, bandwidth, and transmit power using the well-documented Semtech SX1278 register map.
Once hardware initialization is complete, load the appropriate LoRa library for your platform such as RadioHead, LMIC, or the Arduino LoRa library, which abstracts the complex register operations into simple function calls. Configure the frequency to 433 MHz and set your spreading factor based on your application requirements: use SF7 for maximum data rate when range is adequate, or SF12 for maximum range when data rate is not critical. Implement interrupt service routines to handle transmission complete and data received events from the DIO pins. For mesh networking applications, implement packet routing logic that allows nodes to relay messages from distant nodes, extending the effective network range. Always include error checking and acknowledgment mechanisms in your application layer protocol to ensure reliable data delivery across the wireless link.
Frequently Asked Questions
What is the difference between spreading factor SF7 and SF12 on the RFM98?
Spreading factor determines the LoRa modulation characteristics. SF7 provides the fastest data rate of approximately 50 kbps with the shortest range, typically 1-2 kilometers in urban environments. SF12 provides the slowest data rate of approximately 0.3 kbps but achieves maximum range up to 15 kilometers in line-of-sight conditions. The trade-off is fundamental: higher spreading factors increase range and interference immunity but reduce data throughput and increase transmission time, consuming more energy per bit transmitted. Choose SF7 for short-range, high-frequency updates and SF12 for long-range, low-frequency sensor readings.
Can the RFM98 module communicate with standard LoRaWAN gateways?
The RFM98 module itself is a point-to-point LoRa transceiver and does not implement the LoRaWAN protocol stack. However, it can transmit LoRa modulated signals that are compatible with LoRaWAN gateways at the physical layer. To achieve full LoRaWAN compliance including MAC layer functionality, encryption, and network integration, you must implement the LoRaWAN protocol stack on your microcontroller using libraries like LMIC or Semtech's reference implementation. This allows your RFM98-based node to join public LoRaWAN networks and communicate through standard gateways and network servers.
What antenna type and impedance matching are required for optimal performance?
The RFM98 module requires a 50-ohm impedance-matched antenna designed for the 433 MHz frequency band. Common options include quarter-wave monopole antennas approximately 17 centimeters long, helical antennas for compact installations, or Yagi directional antennas for point-to-point links. The antenna connector on the module is designed for 50-ohm coaxial cable. Ensure the antenna is properly impedance-matched to the module output to maximize transmission efficiency and receiver sensitivity. Mismatched antennas result in significant signal loss and reduced range. For PCB-integrated designs, use a printed monopole or inverted-F antenna with proper ground plane clearance and matching network design.
How do I calculate the required battery capacity for my RFM98 application?
Battery life depends on the duty cycle of your application. Calculate the average current consumption by multiplying the sleep current (less than 1 microampere), receive current (12 mA), and transmit current (120 mA) by their respective time percentages. For example, if your node sleeps 99 percent of the time and transmits 1 percent, the average current is approximately 1.2 mA. A 2000 mAh battery would provide approximately 1667 hours or 69 days of operation. Use lower spreading factors and shorter transmission intervals to reduce power consumption. Implement adaptive data rate algorithms that adjust spreading factor based on link quality to optimize battery life while maintaining reliability.
When will I receive my order?
Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.
What is your return and warranty policy?
We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full ref
Buy 2.4G RFM98 LoRa Radio Node v1.0 Based on S x1278-(433 Mhz) Online in India
Purchase the 2.4G RFM98 LoRa Radio Node v1.0 Based on S x1278-(433 Mhz) online at The Engineer Store, India's trusted source for genuine electronics. We deliver across Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat.
Our team in Bengaluru is available 24/7 to support your journey from product selection to project completion.
2.4G RFM98 LoRa Radio Node v1.0 Based on SX1278 433 MHz
The RFM98 LoRa Radio Node v1.0 is a high-performance long-range wireless communication module based on the Semtech SX1278 transceiver, operating at 433 MHz frequency band. This module is designed for IoT engineers, embedded systems developers, and wireless communication professionals who require reliable, low-power, long-distance data transmission over extended ranges up to 15 kilometers in open space. It solves the critical challenge of establishing secure, battery-efficient wireless connectivity for remote sensor networks, telemetry systems, and distributed IoT applications where traditional WiFi and cellular networks are impractical or cost-prohibitive.
Product Overview
The RFM98 LoRa Radio Node operates on LoRa (Long Range) spread spectrum modulation technology, which enables communication at extremely low power levels while maintaining exceptional range and interference immunity. The module utilizes the proven Semtech SX1278 chipset, a mature and widely-adopted transceiver that supports multiple spreading factors, bandwidth configurations, and coding rates. This flexibility allows engineers to optimize performance based on specific application requirements, trading off between range, data rate, and power consumption. The 433 MHz frequency band provides excellent propagation characteristics for both indoor and outdoor deployments, with superior wall penetration compared to higher frequency alternatives.
This v1.0 node implementation incorporates integrated antenna matching, crystal oscillator stability, and robust filtering to ensure reliable operation in noisy RF environments. The module supports both point-to-point and mesh networking topologies, making it ideal for scalable IoT deployments. With sleep current consumption in the microampere range and active transmission currents around 120 mA, the RFM98 enables battery-powered applications with multi-year operational lifespans. The compact form factor and standardized pinout facilitate rapid prototyping and integration into custom PCB designs, while the well-documented SX1278 architecture ensures compatibility with extensive software libraries and development frameworks.
Key Specifications
| Specification | Details |
| Product Type | LoRa Radio Transceiver Module |
| Chipset | Semtech SX1278 |
| Frequency Band | 433 MHz ISM Band |
| Modulation | LoRa Spread Spectrum |
| Output Power | 20 dBm (100 mW) maximum |
| Sensitivity | -139 dBm at SF12, BW125kHz |
| Range | Up to 15 km line-of-sight |
| Data Rate | 0.3 to 50 kbps |
| Spreading Factor | SF7 to SF12 configurable |
| Bandwidth | 7.8 kHz to 500 kHz selectable |
| Supply Voltage | 3.3V to 5V |
| Sleep Current | Less than 1 microampere |
| Transmit Current | 120 mA at 20 dBm |
| Receive Current | 12 mA typical |
| Interface | SPI serial interface |
| Operating Temperature | -40 to +85 degrees Celsius |
| Origin | Original/Authentic |
| Warranty | 7 days on manufacturing defects |
| Shipping | 1-5 days from Bengaluru |
| Delivery | 7-8 days across India |
| Support | 24/7 via Email and WhatsApp |
Key Features
- Extended Range Communication: Achieves up to 15 kilometers line-of-sight transmission using LoRa modulation with configurable spreading factors, enabling deployment across large geographical areas with minimal infrastructure
- Ultra-Low Power Consumption: Microampere-level sleep current and efficient receive/transmit modes allow battery-powered nodes to operate for months or years on standard alkaline or rechargeable batteries
- Flexible Configuration: Supports spreading factors SF7 through SF12, bandwidth selection from 7.8 kHz to 500 kHz, and multiple coding rates, enabling optimization for specific range and data rate requirements
- Robust Interference Immunity: LoRa spread spectrum technology provides superior rejection of narrowband interference and multipath fading, ensuring reliable operation in congested RF environments
- SPI Interface Compatibility: Standard serial peripheral interface enables seamless integration with Arduino, Raspberry Pi, STM32, and other microcontroller platforms using readily available libraries
- Integrated Antenna Matching: Built-in impedance matching and filtering circuits eliminate the need for external matching components, reducing design complexity and PCB footprint
Applications and Use Cases
- Remote Environmental Monitoring: Deploy sensor networks across agricultural fields, forests, and water bodies to collect temperature, humidity, soil moisture, and air quality data with minimal power requirements and extended wireless range
- Industrial IoT and Predictive Maintenance: Monitor equipment health, vibration, temperature, and operational parameters in factories and industrial facilities where WiFi coverage is unavailable or unreliable
- Smart Metering and Utility Management: Implement automatic meter reading systems for water, gas, and electricity consumption across distributed locations with secure, long-range wireless data collection
- Asset Tracking and Logistics: Track movement of valuable equipment, containers, and shipments across supply chains using low-power GPS-integrated nodes that report location periodically over extended distances
- Building Automation and Smart Cities: Create mesh networks for lighting control, HVAC monitoring, occupancy detection, and environmental sensing in large buildings and urban infrastructure applications
- Emergency Response and Disaster Recovery: Establish temporary communication networks in areas where cellular infrastructure is damaged, using battery-powered LoRa nodes for emergency alerts and situational awareness
How to Use
To begin using the RFM98 LoRa Radio Node, first establish the hardware connection between the module and your microcontroller via the SPI interface. Connect the DIO0 through DIO5 pins to corresponding GPIO pins on your microcontroller for interrupt handling and mode signaling. Ensure proper power supply decoupling with a 100 nanofarad ceramic capacitor placed as close as possible to the VCC pin, and connect the antenna to the ANT pin through a 50-ohm impedance-matched trace or connector. Configure the SPI clock frequency between 1 and 10 MHz and initialize the module by writing the appropriate register values to set your desired frequency, spreading factor, bandwidth, and transmit power using the well-documented Semtech SX1278 register map.
Once hardware initialization is complete, load the appropriate LoRa library for your platform such as RadioHead, LMIC, or the Arduino LoRa library, which abstracts the complex register operations into simple function calls. Configure the frequency to 433 MHz and set your spreading factor based on your application requirements: use SF7 for maximum data rate when range is adequate, or SF12 for maximum range when data rate is not critical. Implement interrupt service routines to handle transmission complete and data received events from the DIO pins. For mesh networking applications, implement packet routing logic that allows nodes to relay messages from distant nodes, extending the effective network range. Always include error checking and acknowledgment mechanisms in your application layer protocol to ensure reliable data delivery across the wireless link.
Frequently Asked Questions
What is the difference between spreading factor SF7 and SF12 on the RFM98?
Spreading factor determines the LoRa modulation characteristics. SF7 provides the fastest data rate of approximately 50 kbps with the shortest range, typically 1-2 kilometers in urban environments. SF12 provides the slowest data rate of approximately 0.3 kbps but achieves maximum range up to 15 kilometers in line-of-sight conditions. The trade-off is fundamental: higher spreading factors increase range and interference immunity but reduce data throughput and increase transmission time, consuming more energy per bit transmitted. Choose SF7 for short-range, high-frequency updates and SF12 for long-range, low-frequency sensor readings.
Can the RFM98 module communicate with standard LoRaWAN gateways?
The RFM98 module itself is a point-to-point LoRa transceiver and does not implement the LoRaWAN protocol stack. However, it can transmit LoRa modulated signals that are compatible with LoRaWAN gateways at the physical layer. To achieve full LoRaWAN compliance including MAC layer functionality, encryption, and network integration, you must implement the LoRaWAN protocol stack on your microcontroller using libraries like LMIC or Semtech's reference implementation. This allows your RFM98-based node to join public LoRaWAN networks and communicate through standard gateways and network servers.
What antenna type and impedance matching are required for optimal performance?
The RFM98 module requires a 50-ohm impedance-matched antenna designed for the 433 MHz frequency band. Common options include quarter-wave monopole antennas approximately 17 centimeters long, helical antennas for compact installations, or Yagi directional antennas for point-to-point links. The antenna connector on the module is designed for 50-ohm coaxial cable. Ensure the antenna is properly impedance-matched to the module output to maximize transmission efficiency and receiver sensitivity. Mismatched antennas result in significant signal loss and reduced range. For PCB-integrated designs, use a printed monopole or inverted-F antenna with proper ground plane clearance and matching network design.
How do I calculate the required battery capacity for my RFM98 application?
Battery life depends on the duty cycle of your application. Calculate the average current consumption by multiplying the sleep current (less than 1 microampere), receive current (12 mA), and transmit current (120 mA) by their respective time percentages. For example, if your node sleeps 99 percent of the time and transmits 1 percent, the average current is approximately 1.2 mA. A 2000 mAh battery would provide approximately 1667 hours or 69 days of operation. Use lower spreading factors and shorter transmission intervals to reduce power consumption. Implement adaptive data rate algorithms that adjust spreading factor based on link quality to optimize battery life while maintaining reliability.
When will I receive my order?
Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.
What is your return and warranty policy?
We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full ref
Buy 2.4G RFM98 LoRa Radio Node v1.0 Based on S x1278-(433 Mhz) Online in India
Purchase the 2.4G RFM98 LoRa Radio Node v1.0 Based on S x1278-(433 Mhz) online at The Engineer Store, India's trusted source for genuine electronics. We deliver across Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat.
Our team in Bengaluru is available 24/7 to support your journey from product selection to project completion.