RFD868x Modem

Key Features

• Processor: 32-bit ARM Cortex core

• Frequency Range: 865–870 MHz

• Output Power: 1W (+30 dBm), adjustable in 1 dB increments

• Air Data Rates: Selectable rates from 12 to 750 kbps; default at 64 kbps

• UART Data Rates: Configurable from 1,200 to 1,000,000 baud; default at 57,600 baud

• Receive Sensitivity: Up to -111 dBm at 12 kbps

• Interfaces:

  • 2 x RP-SMA RF connectors with diversity switching

  • Logic-level TTL serial interface (+3.3 V)

  • 6 general-purpose I/O pins (digital capable)

• Power Requirements: +5 V nominal (3.5 V min to 5.5 V max), ~800 mA peak at maximum transmit power

• Physical Dimensions: 30 mm (W) x 57 mm (L) x 12.8 mm (H)

• Weight: Approximately 14.5 grams

• Operating Temperature Range: -40°C to +85°C; tested operational from -73°C to +123°C

• Firmware: Re-implemented SiK firmware with field-upgradable capabilities

• Additional Features:

  • AES hardware-accelerated encryption

  • Full ESD protection and filtering on all I/O ports

  • RC PPM passthrough with simultaneous telemetry support

  • Automatic antenna diversity switching

  • Frequency hopping spread spectrum (FHSS)

  • MAVLink protocol framing and status reporting