SparkFun
LoRa Transceiver Module (RFM95CW)
The RFM95CW is an ultra-low-power LoRa transceiver module covering 137–1020 MHz. It delivers sensitivity down to -148 dBm, making it well suited for long-ran...
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The RFM95CW is an ultra-low-power LoRa transceiver module covering 137–1020 MHz. It delivers sensitivity down to -148 dBm, making it well suited for long-range wireless communication in IoT, remote sensing, and telemetry applications.
With a 1.8–3.7V operating range and sleep currents as low as 160 nA, the RFM95CW is designed for battery-powered projects where power efficiency is critical. Communication is handled over a standard 4-wire SPI interface.
Key Features
- LoRa Modulation – Long-range, low-power wireless communication
- Wide Frequency Range – 137–1020 MHz, suitable for various ISM bands
- High Sensitivity – Up to -148 dBm for optimised link performance
- Ultra-Low Power – 160 nA sleep current (duty cycle off), 9.9 mA at -148 dBm sensitivity
- SPI Interface – Standard 4-wire SPI for easy integration
- Duty-Cycle Mode – Supports automatic duty-cycle operation for reduced power consumption
- High-Precision RSSI – Accurate received signal strength indication
Specifications
- Frequency Range – 137–1020 MHz
- Modulation – LoRa
- Data Rate – 0.018–37.5 kbps
- Sensitivity – -123 dBm (BW=125 kHz, SF=12)
- Operating Voltage – 1.8–3.7V
- Receive Current – 12.5 mA (BW=125 kHz)
- Sleep Current – 160 nA (duty cycle off) / 600 nA (duty cycle on)
- Interface – 4-wire SPI
Ideal For
- IoT and LoRaWAN applications
- Remote sensor networks
- Battery-powered wireless telemetry
- Long-range point-to-point communication
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- duty cycle
- The fraction of time a signal or power source is switched on during each repeating on/off cycle, usually given as a percentage. It is central to PWM (pulse-width modulation), where adjusting the duty cycle controls things like LED brightness, motor speed or heater power, and on devices such as proximity sensors it can also affect detection range, response speed, accuracy and power use.
- IoT
- Short for Internet of Things, meaning physical devices that connect to networks or the internet to send data or be controlled remotely. It matters if you want projects such as connected sensors, remote controls or classroom data-logging activities.
- LoRa
- LoRa is a long-range, low-power wireless radio technology often used for telemetry, remote sensors and other links that send small amounts of data over long distances. It is distinct from Bluetooth and WiFi, so sharing a connector or pinout with LoRa hardware does not mean a device actually uses LoRa.
- SPI
- A fast serial communication bus often used for displays, memory cards, and sensors. It matters because SPI devices need specific pins for clock and data, plus a separate chip-select line for each device.
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Brands
Connectivity
RFM95CW Datasheet
Datasheet · 262.4 KB · Click any page to view full size
Supplier page — sparkfun.com
Supplier Description · 556.6 KB · Click any page to view full size
Related Tutorials
Free guides on learn.littlebird.com.au
