Radio Receiver RR4

Designed for weather soundings with Sparv S2, RR4 captures atmospheric data using LoRa radio modulation—reliably, wirelessly, and with field-ready resilience

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Radio receiver RR4 adapted to weather sonde Windsond S2.

Built for field

Weather proof

RR4 is built to withstand demanding environments. Its IP65-rated enclosure protects against dust, rain, and rough handling, making it suitable for outdoor and mobile operations.

Up to 20h of autonomy

The internal battery provides up to 20 hours of autonomous use. This allows for flexible deployment without the need for external power sources or cables.

Protected connectors

Connector ports are shielded with protective caps when not in use, ensuring long-term reliability and minimizing wear during transport, storage, or fieldwork.

Data handling options

USB icon representing live data forwarding from RR4 to PC for real-time monitoring.

USB forwarding to PC

RR4 streams live weather data directly to a PC via USB. Compatible with Windsond Desktop, it enables real-time monitoring and analysis during soundings. A license file is required.

MicroSD card image symbolizing RR4’s internal data recording for offline storage.

Internal microSD recording

RR4 records all incoming data to its internal microSD card, ensuring secure offline storage. Ideal for field missions where PC access is limited or post-processing is preferred.

Wi-Fi icon indicating upcoming wireless data transfer feature from RR4 to PC.

Wi-Fi forwarding to PC (coming soon)

An upcoming feature will allow RR4 to transmit data wirelessly to a PC over Wi-Fi. This enables flexible setups and reduces cable clutter during mobile or remote operations.

Bluetooth icon showing planned short-range wireless data forwarding from RR4 to PC.

Bluetooth forwarding to PC (coming soon)

Bluetooth support is planned to offer short-range wireless data transfer from RR4 to a PC. This will simplify connectivity in compact setups or when USB ports are unavailable.

Person using laptop representing upcoming RR4 web app accessible over Wi-Fi.

Web app over Wi/Fi (coming soon)

RR4 will soon host a built-in web app over Wi-Fi, letting users view live data on laptops, tablets, or smartphones—no software installation required, just connect and explore.

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Sonde Connection Features

Accelerate GPS Acquisition

Connecting RR4 to the S2 sonde speeds up GPS signal lock before launch, ensuring faster readiness and more accurate positioning data from the very start of the sounding.

Person using Google Maps in forest illustrating faster GPS acquisition with RR4 and S2

Charges and Powers the Sonde

The short cable allows RR4 to charge the S2’s internal battery and supply power directly, enabling pre-launch preparation without relying on external chargers or separate power sources.

Battery icon showing RR4 charging and powering the Windsond S2 sonde.

Synchronizes Radio Settings

RR4 automatically aligns radio parameters with the connected S2 sonde, ensuring seamless communication and reducing setup errors, ideal for efficient field operations and consistent data transmission.

Radio antenna symbolizing RR4 synchronizing radio settings with S2 sonde.

Sonde Connection Features

Accelerate GPS Acquisition

Connecting RR4 to the S2 sonde speeds up GPS signal lock before launch, ensuring faster readiness and more accurate positioning data from the very start of the sounding.

Charges and Powers the Sonde

The short cable allows RR4 to charge the S2’s internal battery and supply power directly, enabling pre-launch preparation without relying on external chargers or separate power sources.

Synchronizes Radio Settings

Built-in GPS for Precise Timestamping

RR4 includes an integrated GPS module that ensures accurate data timestamping during soundings, improving traceability and synchronization across devices and enhancing post-flight analysis.

Barometer for Pre-Launch Pressure Checks

The onboard barometer allows users to verify sonde pressure readings before launch, adding an extra layer of confidence and calibration to each atmospheric measurement.

Buzzer for Reception Feedback

An optional buzzer provides audible feedback on radio signal quality, helping operators quickly assess reception strength without needing to monitor a screen.

Three Status LEDs

Three intuitive LEDs display essential system states at a glance—power, signal, and activity—making field operation simpler and more responsive.

Expansion Slot for Future Add-ons

RR4 includes an internal expansion slot, offering hardware flexibility for future upgrades, custom modules, or mission-specific enhancements.

Field-Updatable Firmware

Firmware updates can be applied directly in the field, ensuring RR4 stays current with new features, bug fixes, and performance improvements—no need to return to base.

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RR4 flyers

RR4 datasheet

RR4 Manual

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Here you can find information on older models.

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