902-928MHz frequency band Configuration and usage guide/Flash Programmer User Manual

Download：RFD900x Peer-to-peer V3.X User Manual V1.2 (in PDF)

RFD900x Peer-to-peer V3.X User Manual V1.4 (in PDF)

RFD900x Peer-to-peer User Manual V1.1（in PDF）

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Introduction

The RFD900x radio modem can be loaded with three official firmware releases to achieve different communication architectures and node topologies. So far, the available firmware versions are:

• Peer-to-peer (P2P) (SiK)
• Asynchronous mesh
• Multipoint network

This document describes the configuration of the peer-to-peer releases V3 and up. RFD900x sold after April 2019 come with this version loaded by default, and it requires no further configuration to work. Figure 1-1 pictures a P2P network diagram.

Figure 1-1: Peer-to-peer network architecture

Software/GCS Support

This firmware is a development of the open source project called “SiK” that was created by Mike Smith and further developed and modified by Andrew Tridgell and RFDesign.

The modems feature a boot loader to facilitate field upgrade of the modem firmware via the serial port. This is most easily performed by using the latest version RFD Modem tools (see “Useful links”)

Parameters such as power levels, air data rates, serial speeds, GPIO pins etc can all be custom set by using the AT Command set, the RFD Modem Tools and APM Planner.

Default serial port settings are as follows:

• 57600 baud rate
• No parity
• 8 data bits
• 1 stop bit

The RFD900x Radio Modem has many software features including:

• Certified 900 MHz variants compliant with FCC, IC and AS standards
• Frequency Hopping Spread Spectrum
• Transparent Serial Link
• Configuration by AT commands for local radio, RT commands for remote radio
• User configurable serial data rates and air data rates
• Error correction routines
• 128-bit AES hardware encryption with user settable key
• 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 real-time
• Automatic duty cycle throttling based on radio temperature to avoid overheating
• PPM (R/C signal) pass through (Control vehicle across radio).
• GIPO pin mirroring