2.4G RFM98 LoRa Radio Node v1.0 Based on S x1278-(868 Mhz)

The 2.4G RFM98 LoRa Radio Node v1.0 is a long-range wireless transceiver module based on the Semtech SX1278 chipset, operating in the 868 MHz ISM band for reliable IoT and telemetry applications. Professional engineers and IoT developers use this module to build low-power, wide-area network (LPWAN) solutions for remote monitoring, asset tracking, and distributed sensor networks across challenging RF environments. This product solves the critical problem of establishing long-distance wireless communication with minimal power consumption, enabling deployment in battery-powered devices that require years of operational life without frequent maintenance or battery replacement.

Product Overview

The RFM98 LoRa Radio Node operates on LoRa modulation technology, which utilizes chirp spread spectrum (CSS) encoding to achieve exceptional range and link budget performance. The SX1278 baseband processor delivers up to 20 dBm output power with configurable spreading factors (SF7 to SF12), allowing engineers to optimize the trade-off between data rate and range based on specific application requirements. The 868 MHz frequency band is ideal for European and Asian IoT deployments, providing excellent propagation characteristics through obstacles and foliage while maintaining compliance with regional spectrum regulations.

This v1.0 node integrates a complete transceiver front-end with integrated frequency synthesizer, eliminating the need for external RF components and reducing design complexity. The module features automatic frequency calibration, built-in temperature compensation, and robust packet handling with CRC error detection. Operating voltage ranges from 2.3V to 3.7V make it compatible with standard lithium-ion and alkaline battery packs, while the low standby current consumption (less than 1 microampere) ensures extended deployment periods in remote monitoring applications without grid power availability.

Key Specifications

Specification	Details
Product Type	LoRa Radio Transceiver Module
Chipset	Semtech SX1278
Frequency Band	868 MHz ISM Band
Modulation	LoRa Chirp Spread Spectrum
Output Power	Up to 20 dBm
Spreading Factor Range	SF7 to SF12 (configurable)
Bandwidth	125 kHz, 250 kHz, 500 kHz
Sensitivity	-139 dBm (SF12, 125 kHz)
Operating Voltage	2.3V to 3.7V DC
Standby Current	Less than 1 microampere
TX Current	120 mA at 20 dBm
RX Current	10 mA
Interface	SPI (Serial Peripheral Interface)
Antenna Connector	SMA or integrated dipole
Operating Temperature	-40 to 85 degrees Celsius
Brand	Semtech SX1278 Based
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

• Long-Range Communication: Achieves coverage up to 15+ kilometers in open space and 5+ kilometers in urban environments with optimal spreading factor configuration
• Ultra-Low Power Consumption: Standby current under 1 microampere enables multi-year battery operation in remote sensor nodes without external power infrastructure
• Configurable Spreading Factors: SF7 through SF12 selection allows dynamic optimization between data throughput and link reliability based on real-time channel conditions
• SPI Interface: Direct microcontroller integration via standard SPI protocol simplifies firmware development and reduces time-to-market for custom IoT solutions
• Automatic Frequency Calibration: Built-in temperature compensation ensures frequency stability across -40 to 85 degree Celsius operating range without manual recalibration
• Robust Packet Handling: Integrated CRC error detection and automatic acknowledgment mechanisms ensure reliable data delivery in noisy RF environments

Applications and Use Cases

• Remote Environmental Monitoring: Deploy sensor networks across agricultural fields, forests, and water bodies to collect temperature, humidity, and soil moisture data with multi-year battery autonomy
• Asset Tracking and Logistics: Implement GPS-free location tracking for containers, vehicles, and equipment across regional supply chains using triangulation from fixed LoRa gateways
• Smart Metering Infrastructure: Build automated utility meter reading systems for water, gas, and electricity with encrypted data transmission and tamper detection capabilities
• Industrial IoT and Predictive Maintenance: Monitor machinery vibration, temperature, and performance metrics across distributed factory floors and production facilities with centralized data aggregation
• Wildlife Conservation: Track animal movements and population dynamics in protected areas using lightweight, battery-powered collars that transmit location data to regional base stations
• Emergency Response Networks: Establish resilient communication infrastructure for disaster zones and remote areas where cellular networks are unavailable or damaged

How to Use

Begin by connecting the RFM98 module to your microcontroller via SPI interface, ensuring proper voltage regulation between 2.3V and 3.7V. Configure the SX1278 registers using the provided datasheet to set your desired frequency (868 MHz), spreading factor (typically SF9 for balanced range and data rate), and bandwidth (125 kHz recommended for most applications). Attach an appropriate 868 MHz antenna with impedance matching to the SMA connector or integrated antenna pad, ensuring proper grounding and isolation from high-current traces on your PCB.

Develop your firmware using the SPI command set to initialize the transceiver, configure packet structure with your desired payload size and CRC settings, and implement interrupt handlers for transmission complete and reception events. Test your link budget by measuring received signal strength indicator (RSSI) values at various distances to validate coverage predictions. Deploy your nodes with adequate antenna height and clear line-of-sight where possible, and monitor gateway reception statistics to optimize spreading factor selection and network capacity. For multi-node networks, implement time-slotted access protocols or collision avoidance mechanisms to prevent simultaneous transmissions that would corrupt received packets at your central gateway.

Frequently Asked Questions

What is the maximum transmission range of the RFM98 LoRa module?

The RFM98 achieves approximately 15+ kilometers in open, line-of-sight conditions with SF12 spreading factor and 125 kHz bandwidth, though typical urban deployments see 5-8 kilometer ranges due to building obstruction. Range varies significantly based on antenna height, spreading factor selection, transmit power, and environmental terrain. Higher spreading factors provide extended range at the cost of reduced data throughput and increased airtime consumption.

How long can a battery-powered RFM98 node operate without recharging?

Battery life depends on transmission frequency and spreading factor, but a single AA battery can power a node for 2-5 years if transmitting once every 10 minutes with SF9. Reducing transmission frequency to hourly intervals extends battery life to 10+ years. The sub-1 microampere standby current is the key advantage, allowing the node to sleep between transmissions without significant power drain, making RFM98 ideal for long-term remote deployments.

Can the RFM98 operate on frequencies other than 868 MHz?

The SX1278 chipset supports multiple frequency bands including 433 MHz, 470-510 MHz, 779-928 MHz, and others depending on regional variants. The 868 MHz version is optimized for European and Asian markets. If you require a different frequency band for your region, contact our support team to verify availability of alternative frequency variants or consider the more flexible RFM95 module that supports 433/868/915 MHz operation.

What is the difference between LoRa and LoRaWAN?

LoRa is the physical layer modulation technology used by the RFM98 module for long-range wireless transmission. LoRaWAN is a network protocol layer built on top of LoRa that adds security, addressing, and network management features. The RFM98 module provides raw LoRa functionality, allowing you to implement custom network protocols or integrate with LoRaWAN gateways and network servers for standardized IoT deployments.

Is the RFM98 suitable for real-time applications?

The RFM98 is not suitable for real-time critical applications due to variable transmission latency determined by spreading factor and airtime. SF12 transmissions can take 1-2 seconds per packet, making this module ideal for periodic monitoring and data collection rather than time-critical control systems. For applications requiring sub-second latency, consider higher-frequency modules like 2.4 GHz WiFi or cellular alternatives.

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 refund. Not applicable for user damage or misuse.

Are bulk discounts available?

Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.

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