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RFM98W-433S2R

433MHz LoRa transceiver, -148dBm, +20dBm, SPI, 16x16mm, SX1272 based, up to 15km range

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Manufacturer Part：

RFM98W-433S2R

Package：

SMD Module (16 x 16 x 1.8 mm)

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Description

Product Overview

The RFM98W-433S2R is a 433MHz ISM band LoRa transceiver module from RF Solutions based on the Semtech SX1272 transceiver chip. Using Chirp Spread Spectrum (LoRa) modulation, this module achieves up to 15km line-of-sight range with -148dBm receiver sensitivity at 18bps (SF=12). The module also supports FSK, GFSK, MSK, GMSK, and OOK modulation, communicating via SPI interface with the host, in a compact 16 x 16mm form factor.

Key Specifications

Frequency 433 MHz ISM Band
Modulation LoRa, FSK, GFSK, MSK, GMSK, OOK
Max Output Power +20 dBm
Receiver Sensitivity (LoRa) -148 dBm @ 18bps (SF12)
Receiver Sensitivity (FSK) -119 dBm @ 1.2kbps
Data Rate (LoRa) Up to 37.5 kbps
Data Rate (FSK) Up to 250 kbps
Range (LoS) Up to 15 km
Interface SPI
Supply Voltage 1.8V to 3.6V
Operating Temperature -20°C to +70°C
Dimensions 16 x 16 x 1.8 mm

Features

  • LoRa Chirp Spread Spectrum for extended range communication
  • Ultra-high receiver sensitivity of -148dBm for deep penetration
  • Up to 15km line-of-sight communication range
  • Multiple modulation schemes: LoRa, FSK, GFSK, OOK
  • Forward Error Correction (FEC) with selectable coding rate
  • Packet engine up to 256 bytes with CRC

Applications

  • Automated meter reading (AMR)
  • Home and building automation
  • Wireless alarm and security systems
  • Industrial monitoring and control
  • Long-range IoT communication

The RF Solutions RFM98W-433S2R is a high-performance LoRa transceiver module operating in the 433MHz ISM band, based on the Semtech SX1272 chipset. The module employs LoRa (Long Range) Chirp Spread Spectrum modulation technology to achieve exceptional communication range of up to 15km line-of-sight, with outstanding receiver sensitivity of -148dBm. This makes it ideal for applications requiring long-range, low-power wireless connectivity in challenging RF environments. In addition to LoRa modulation, the module supports conventional FSK, GFSK, MSK, GMSK, and OOK modulation schemes for compatibility with existing systems. The integrated packet engine handles CRC, FEC, and data packing up to 256 bytes, reducing host processor overhead. Communication with the host is via a standard SPI interface, and the module includes an integrated temperature sensor and low-battery indicator.

The RFM98W-433S2R operates as a half-duplex transceiver controlled via SPI by a host microcontroller. In LoRa mode, the SX1272 chipset uses Chirp Spread Spectrum (CSS) modulation where data symbols are encoded as chirp signals that sweep across the channel bandwidth. The spreading factor (SF7 to SF12) trades data rate for range: higher SF provides better sensitivity at lower data rates. The receiver uses a matched filter to correlate incoming chirps, achieving -148dBm sensitivity at SF12. In FSK mode, the carrier frequency is shifted between mark and space frequencies at data rates up to 250kbps. The 127dB dynamic range RSSI enables co-channel interference detection. Forward Error Correction (CR=4/5 to 4/8) adds redundancy bits to the payload for error correction without retransmission. The transmitter can output up to +20dBm with programmable PA boost and ramp control for spectral compliance.

Pin Name Type Function
1 GND Power Ground connection
2 MISO Output SPI master-in slave-out data
3 MOSI Input SPI master-out slave-in data
4 SCK Input SPI clock
5 NSS Input SPI chip select (active low)
6 RESET Input Module reset (active low)
7 DIO5 I/O Configurable digital I/O
8 GND Power Ground connection
9 ANT I/O RF antenna connection (50Ω)
10 GND Power Ground connection
11 VDD Power Supply voltage (1.8-3.6V)
12 DIO0 I/O Configurable digital I/O (IRQ)
  • Automated meter reading and smart utility infrastructure
  • Home and building automation with long-range links
  • Wireless alarm and security system communication
  • Industrial monitoring and remote sensor networks
  • Long-range IoT communication for smart agriculture
Manufacturer Part Number Package Notes
RF Solutions RFM95W-868S2 16x16mm 868MHz variant
RF Solutions RFM95W-915S2 16x16mm 915MHz variant
HopeRF RFM95W-433S2 16x16mm SX1276 based, 433MHz
Semtech SX1272MB2xAS Shield SX1272 evaluation board
Dragino LoRa1276 16x16mm SX1276 based 433MHz module
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Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China

 

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Contact Information

Email: info@materialparts.com

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Service & Packaging

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

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Contact Information

For service consultation or packaging customization, please feel free to contact us:
Email: info@materialparts.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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