This is the ideal solution for long range telemetry or communications. Two RFD868+ modems with included antennas.
NOT COMPATIBLE WITH RFD868x or TXMOD module
- Long range (40km+) depending on antennas and GCS setup
- 2x RP-SMA RF connectors, diversity switched
- 1 Watt (+30dBm) transmit power
- Low-pass filter on TX
- > 20dB Low noise amplifier, high IP3
- RX SAW filter
- All I/O ESD protected and filtered
- Open source SiK firmware (V1.x), easy to configure, field upgradable
- Multipoint software capability with MP SiK (V2.x)
- Small, light weight
- Compatible with 3DR / Hope-RF radio modules
- RF: 2x RP-SMA antenna connectors
- Serial: logic-level TTL (3.3v nominal, 5v tolerant)
- Power: 5v ~800mA max peak (at maximum transmit power)
- GPIO: 6 General purpose IO (Digital, ADC, PWM capable).
- Frequency Range: 868-869 MHz
- Output Power: 1W (+30dBm), controllable in 1dB steps ( +/- 1dB @=20dBm typical)
- Air Data transfer rates: 4, 8, 16, 19, 24, 32, 48, 64, 96, 128, 192 and 250 kbit/sec (user selectable, 64k default)
- UART data transfer rates: 2400, 4800, 9600, 19200, 38400, 57600, 115200 baud (user selectable, 57600 default)
- Receive Sensitivity: >121 dBm at low data rates
- Size: 30 mm (wide) x 57 mm (long) x 12.8 mm (thick) - Including RF Shield, Heatsink and connector extremeties
- Weight: 14.5g
- Mounting: 3 x M2.5 screws, 3 x header pin solder points
- Power Supply: 5 V nominal, (3.5v min, 5.5v max), ~800 mA peak at maximum power
- Temp. range: -40 to +85 °C, tested operational from -73 to +123 °C.
Software / GCS Support:
Note: Firmware for the RFD868 is the same as RFD900, the board identity is defined in the bootloader. The correct file to upgrade a RFD868 is RFDSik Vx.xx rfd900p.ihx
The software solution is an open source development called "SiK" originally by Mike Smith and improved upon by Andrew Tridgell and RFDesign. A boot loader and interface is available for further development and field upgrade of the modem firmware via the serial port.
Most parameters are configurable via AT commands, Eg. baud rate (air/uart), frequency band, power levels, etc., please see the 3DR wiki for commands below for now.
V2.x firmware has been updated to support multipoint networking on the RFD868/900.
- Default settings: 57600 baud, N, 8, 1, 64k air data rate
- User manual/datasheet: RFD900 Datasheet
- Software manual: RFD868/900 Software manual
- RFD868/900 configuration tool and firmware repository: RFDesign Files
- 3DR/RFD868/900 compatible configuration tool: http://vps.oborne.me/3drradioconfig.zip
- V1.x (non multipoint) is suitable for point to point links - the sourcecode is located at https://github.com/RFDesign/SiK
Integrated support for configuring the RFD868/900 radios is supported by APM Planner, with other GCS solutions in development.
Software features include:
- Frequency hopping spread spectrum (FHSS)
- Transparent serial link
- Point to Point or Multipoint networking
- Configuration by simple AT commands for local radio, RT commands for remote radio
- User configurable serial data rates and air datarates
- Error correction routines, Mavlink protocol framing (user selectable)
- Mavlink radio status reporting (Local RSSI, Remote RSSI, Local Noise, Remote Noise)
- Automatic antenna diversity switching on a packet basis in realtime
- Automatic duty cycle throttling based on radio temperature to avoid overheating
The RFD868 is designed to be compliant with the following standards:
- FCC Part 15.247 (Frequency hopping and digitally modulated intentional radiators)
- AS/NZS 4268:2012 (Radio equipment and systems - short range devices)
The modem is designed for system integrators who will integrate the modem into their own projects and product prototypes. The user is responsible for compliance with local regulations for radio transmitters.
In the box
- 2 x RFD868+ Radio Modems
- 1 x Antenna, 868-900MHz Quarter wave monopole 2.1dBi
- 1 x Antenna, 868-900MHz Right Angle Quarter wave monopole 2.1dBi
- 4 x Antennas, 868-900MHz Half wave dipole 3dBi
- 1 x FTDI USB cable
Ships in 4 to 7 working days from order placement