RFM95/96/97/98 (SX1276/77/78/79) LoRa

File:TArduinoRFM9X.png

Summary

LoRa long-range wireless transceiver module supporting multiple frequency bands with configurable spreading factors and signal parameters.

Description

The RFM95/96/97/98 component (based on SX1276/77/78/79 chips) provides long-range, low-power wireless communication using LoRa modulation technology. It features configurable spreading factors (6-12), multiple frequency bands (433MHz, 470MHz, 868MHz, 915MHz), adjustable output power up to 20dBm, and programmable signal bandwidths. The module includes automatic gain control, preamble detection, and symbol timeout handling for robust communication in noisy environments. Typical applications include IoT devices, remote sensors, and long-range wireless networks.

Diagram:

Properties

• Coding Rate – Error correction coding rate (Options: cr4_5, cr4_6, cr4_7, cr4_8) (Default: cr4_5).
• Frequency (MHz) – Operating frequency (Options: 433.0, 470.0, 868.0, 915.0) (Default: 915MHz).
• Gain – Receiver gain control (Options: gcAuto, gcG1, gcG2, gcG3, gcG4, gcG5, gcG6) (Default: gcAuto).
• Lo Ra TMMode – LoRa timing mode configuration (Default: True).
• Low Noise Amplifier High Frequency Boost – LNA high frequency boost setting (Default: False).
• Max Send Queue – Maximum send queue size (Default: 10).
• Mobile Node – Mobile node mode (Default: False).
• Name – Component identifier (Default: RFM9X1).
• Power(dB) – Transmission power level (Default: 13dB).
• Preamble Length – Preamble symbol length (Default: 8).
• Signal Bandwidth (kHz) – Signal bandwidth (Default: 125kHz).
• SPISpeed – SPI communication speed (Default: 4000000Hz).
• Spreading Factor Order – Spreading factor (6-12) (Default: 7).
• Symbol Timeout – Symbol timeout value (Default: 100).

Pins

Input Pins

• Interrupt (digital) – Interrupt signal input (typically connected to DIO0).
• In (data) – Data input for transmission.

Connections

• Interface SPI – SPI interface connection (MISO, MOSI, SCK bundled).
• Chip Select (digital) – SPI chip select (active low).
• Reset (digital) – Hardware reset signal.

Output Pins

• Out (data) – Data output from received packets.
• Signal Strength (analog) – Received signal strength indicator (RSSI).

Categories

• File:SPI.png – SPI communication interface components.
• File:Wireless.png – Wireless communication components.
• File:LoRa.png – LoRa technology components.
• – Radio frequency components.
• File:Communication.png – Communication protocol components.