SiK Telemetry Radio - 1W 915MHz Long Range Pair
by Holybro

The Holybro SiK Telemetry Radio (1W 915MHz Long Range Pair) is an industrial-grade, ultra-long-range communication system designed to establish a rock-solid data link between an autonomous vehicle and a ground control station. Operating on the 915MHz frequency band, this high-power radio pair delivers up to a massive 1W (30dBm) of adjustable RF output power, providing a substantial range expansion over standard 100mW modules. Out of the box, it offers an outdoor, line-of-sight communication range reaching up to 50 kilometers when paired with high-gain antennas. This makes it an invaluable asset for Beyond Visual Line of Sight (BVLOS) operations, commercial mapping missions, agricultural surveying, and industrial inspection applications.

Engineered for seamless open-source architecture, both modules come pre-configured with open-source SiK firmware, which is specifically optimized to intelligently parse and transmit MAVLink protocol telemetry data frames. The radios feature a completely transparent serial link and handle 2-way full-duplex communication using an adaptive Time Division Multiplexing (TDM) UART interface. Additionally, they are completely interchangeable, meaning either unit can serve as the airborne transceiver or the ground station module. Designed for quick deployment, this plug-and-play kit natively interfaces with all Pixhawk Standard flight controllers via a 6-pin JST-GH port, and connects effortlessly to computers, tablets, or phones through a robust Type-C USB port. Built-in Frequency Hopping Spread Spectrum (FHSS) technology provides aggressive interference immunity, while the integrated error-correcting code can fix up to 25% of corrupted data bits automatically.

Technical Specifications

• Frequency Band Support: 902MHz – 928MHz (915MHz native)

• Maximum RF Output Power: 30 dBm (1W maximum, software adjustable)

• Receiver Sensitivity: -121 dBm @ 2kbps RF Data Rate / -105 dBm @ 64kbps RF Data Rate

• Line-of-Sight Range: Up to 50 km (Dependent on configuration, environment, and 5dBi high-gain antennas)

• Supported RF Data Rates: 2, 4, 8, 16, 32, 64 (default), 96, 128, 192, 250 kbps

• Serial Interface Data Speed: 1.2, 2.4, 4.8, 9.6, 19.2, 38.4, 57.6 (default), 115.2 kbps

• Interference Immunity: Frequency Hopping Spread Spectrum (FHSS) with configurable duty cycles

• Hopping Infrastructure: Up to 50 independent Frequency Hopping Channels

• Supported Network Topologies: Point-to-Point configuration

• Configuration Methods: Mission Planner, QGroundControl, or direct AT Commands

• Data Framing & Protocols: Standard Serial or MAVLink protocol framing

• Error Correction Support: Corrects up to 25% of data bit errors via SiK firmware compilation

• Telemetry Data Connector: 6-pin JST-GH connector interface (3.3V TTL logic level)

• PC Data Connector: Integrated Type-C USB port interface

• USB Conversion IC Core: Built-in FT230X / FT231 USB-to-Basic UART chip

• Antenna Port Interface: RP-SMA Female connector

• Dedicated Power Terminal: Integrated XT30 power socket

• Input Operating Voltage: 7V to 28V DC

• Power Consumption (Transmit): 12V / 400mA at full 30 dBm output power

• Power Consumption (Receive): 12V / 30mA

• Operating Temperature Window: -40°C to 85°C

• Physical Module Dimensions: 66.5 mm x 32 mm x 16.5 mm (Excluding antenna dimensions)

• Net Hardware Weight: 67 grams per module (Including standard antenna)

What's Included

• 2 x Holybro SiK Long Range 1W Telemetry Radio Modules (with standard antennas)

• 2 x High-Gain Omnidirectional Antennas

• 1 x Male Type-C to Male Type-C USB Connection Cable

• 1 x Male XT30 to Female XT30 Power Adapter Cable

• 1 x Male XT30 to Female XT60 Power Adapter Cable

• 1 x JST-GH-6P to JST-GH-6P Telemetry Cable (Plug-and-play for Pixhawk Standard Flight Controllers)

• 3 x Rubber Vibration-Damping Structural Grommets