SX1261 LoRa/FSK

File:TArduinoSX1261.png

Summary

Dual-mode LoRa/FSK long-range transceiver with configurable modulation schemes, advanced packet handling, and ultra-low-power operation.

Description

The SX1261 component is a high-performance sub-GHz transceiver supporting both LoRa and FSK modulation schemes. It features configurable frequency bands, multiple spreading factors, adjustable output power, and advanced packet handling with CRC and whitening options. The SX1261 is optimized for low-power applications and supports external RF switch control and comprehensive interrupt handling. Typical applications include long-range IoT devices, smart metering, industrial monitoring, and remote sensor networks.

Diagram:

Properties

• Control External RF Switch – External RF switch control (Default: True).
• Elements – Configurable operation elements:
  • Sleep – Sleep mode configuration
  • Calibrate – Calibration routine
  • Calibrate Image – Image calibration
• Frequency (MHz) – Operating frequency (Default: 915MHz).
• Interrupt Pin Number – Interrupt pin assignment (Default: 1).
• Name – Component identifier (Default: LoRa1).
• Oscillator Control – Oscillator configuration.
  • Boot Time (uS) – Oscillator boot time (Default: 5000uS).
  • Enabled – Enables oscillator (Default: True).
  • Voltage – Oscillator voltage (Default: 1.6V).
• Over Current Protection (mA) – Over-current protection threshold (Default: 140mA).
• Packet – Packet configuration.
  • Frequency Shift Keying (FSK) – FSK modulation settings.
    • Address Filtering – Address filtering configuration.
      • Broadcast – Broadcast address settings.
        • Address – Broadcast address (Default: 0).
        • Enabled – Enables broadcast (Default: False).
      • Enabled – Enables address filtering (Default: False).
      • Node Address – Node address (Default: 0).
    • Bandwidth (KHz) – FSK bandwidth (Default: 156.2KHz).
    • Bit Rate (Kbps) – FSK bit rate (Default: 4.8Kbps).
    • CRC – CRC configuration.
      • Bytes – CRC bytes (Default: 2).
      • Initial Value – CRC initial value (Default: 0x100F).
      • Inverted – CRC inversion (Default: True).
      • Polynomial – CRC polynomial (Default: 0x1021).
    • Frequency Deviation (KHz) – FSK frequency deviation (Default: 5KHz).
    • Gaussian Pulse Shape (Ba...) – Gaussian pulse shaping.
    • Packet Size – Packet size configuration.
      • Value – Packet size value (Default: 8).
      • Variable – Variable packet size (Default: True).
    • Preamble Length – Preamble length (Default: 16).
    • Sync Word – Synchronization word (Default: 0.0).
    • Whitening – Whitening configuration.
      • Enabled – Enables whitening (Default: False).
      • Initial Value – Whitening initial value (Default: 1).
    • Has Header – Packet header presence (Default: True).
  • Is Lo Ra – LoRa mode selection (Default: True).
  • Lo Ra – LoRa modulation settings.
    • Coding Rate – Error correction coding rate (Options: cr4_5, cr4_6, cr4_7, cr4_8) (Default: cr4_5).
    • Has CRC – CRC enabled (Default: True).
    • Invert IQ – IQ inversion (Default: False).
    • Low Data Rate Optimize – Low data rate optimization (Default: False).
    • Preamble Length – LoRa preamble length (Default: 8).
    • Signal Bandwidth (kHz) – LoRa signal bandwidth (Default: 125kHz).
    • Spreading Factor Order – Spreading factor (6-12) (Default: 7).
    • Size – Packet size configuration.
• Power (dB) – Transmission power level (Default: 14dB).
• Ramp Time (uS) – Power ramp time (Default: 100uS).
• SPISpeed – SPI communication speed (Default: 4000000Hz).
• Standby – Standby mode configuration.
  • Enabled – Enables standby mode (Default: True).
  • Oscillator32MHz – 32MHz oscillator control (Default: True).
• Use Low Dropout Regulator – LDO usage (Default: True).

Pins

Input Pins

• Interrupt (digital) – Interrupt signal input.
• Busy (digital) – Busy status input.
• In (spi) – SPI data input.
• Reset (digital) – Hardware reset.
• Chip Select (spi) – SPI chip select.

Output Pins

• Out (spi) – SPI data output.
• Sending (digital) – Transmission status.
• Data CRCError (digital) – CRC error detection.
• Lo Ra Detected (digital) – LoRa mode detection.
• Received Header (digital) – Header reception.
• Preamble Detected (digital) – Preamble detection.
• Header CRCError (digital) – Header CRC error.
• Frequency Shift Keying (FSK) Detected (digital) – FSK mode detection.
• Sync Word Detected (digital) – Sync word detection.

Categories

• File:SPI.png – SPI communication interface components.
• File:Wireless.png – Wireless communication components.
• File:LoRa.png – LoRa technology components.
• – Frequency Shift Keying modulation components.
• File:Communication.png – Communication protocol components.
• – Sub-GHz frequency band components.