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Le GPS est intégré dans un boitier étanche qui ferme la trappe du df95 We now have four GPS units to mount on DF95s, allowing us to track speeds in real time on a display near the remote control. Each unit has its own USB rechargeable battery. A magnetic switch allows the GPS to be turned on/off without opening the cover. The data transmitted to the display can be recorded onto an SD card and then replayed.

Three major components wirelessly transmit, using the same protocol (ESP-NOW), information allowing for the replay of a training session afterwards and the study of options taken in relation to other boats or according to the wind: Autonomous GPS buoys broadcast their positioning every second. One or more anemometers transmit the wind force over the body of water. The boats' GPS systems also broadcast their positioning every second. Le boitier bleu contient le GPS du bateau This data can be viewed in real time on the display below and is also recorded on the display's SD card. Upon returning from training, simply take the "YYYY-MM-DD_HH-MM-SS.json" file from the SD card to replay the data onto a card. First option, requiring the installation and development of a specific solution: The video below shows the result with specific software (Node Red), requiring specific development. A second, simpler option is to use the free Kepler software: https://kepler.gl The file format on the SD card is in a format that can be read directly by the Kepler software. The video below shows how to import and replay data with Kepler.

Three DF95s were equipped with GPS for training with three autonomous buoys, one of which had an anemometer. The following replays were used for debriefing and to refine race strategy.

Click on the photo below to see all the photos of the Class M regatta from 08/03/2026 at CNCR, in Choisy Le Roy, with about ten racers. We used four autonomous GPS buoys, two for the starting line and two as leeward gates. They performed very well and remained on the water, very stable, from 9:30 am to 5:00 pm. On average, 40% of the batteries remained after 7.5 hours of use in light winds. Cliquez sur la photo pour accéder à toutes les photos de la régate A video of the regatta will soon be available on the OpenSailingRC YouTube channel.

Beautiful day for regatta racing, with mild temperatures but unfortunately little wind. A few pleasant breezes allowed us to complete 8 races. We used 4 autonomous GPS buoys to mark the course and reposition it according to the wind's whims. The buoys performed very well, remaining on the water for 7 hours. Enjoy the video summary below.

Discover how quick and easy it is to set up a complete regatta course using autonomous GPS buoys . We are very pleased to have achieved this goal. These new generation buoys allow you to deploy, modify and manage a course in record time — with unparalleled precision and without using an anchor. If you are passionate about RC sailing, autonomous systems or innovative tools for regatta management, watch this video!

What components are needed? Speed display – boat & wind To track your navigations live, all you need is an all-in-one ESP32 controller : touchscreen, Wi-Fi, SD card reader, and built-in battery. We chose the M5Stack Core2 v1.1 ($47) which combines all of this in a single compact package. To store the training data (boat GPS track, wind speed), you also need a 32 GB microSD card, formatted in FAT32. The above SD Card are working very well. 🚤 During your workouts : The boat's GPS sends its position in real time The buoy's anemometer transmits wind speed Data is displayed live on the Core2 screen 📊 What you win : Instantly see your speed and heading relative to the wind Optimize your live settings to improve your VMG Record your sessions to SD card and replay them for a detailed debrief Compare your performance from one session to another and progress faster It's much more than just a display: it's a digital tool for progressing in RC sailing.

What components are needed? The simplest way is to start with a cup anemometer, with 2 wires which give an output voltage depending on the wind speed It is necessary to connect an ESP32 controller. Here we are using the Atom S3 from M5Stack ($15.50) with a small screen to display the wind speed in real time and give its connection status. To power it, we're choosing a 3.7V Lipo battery at €13 and an Adafruit PowerBoost 1000 Charger component at €31, which can charge the Lipo battery with a USB port and boost the voltage to 5V to power the Atom S3. To capture wind force, you need a voltage sensor, which will be connected to the Atom S3. We can take the M5Stack VMeter at $19.5 You also need: a 5cm Grove cable (10 cables for $4): and a T Grove connector (5 connectors for 6.5 $) : Excluding the anemometer, the various components cost around €80 per anemometer to connect. Optionally, if you want to retrieve the GPS coordinates of the location of the Buoy that measures wind speed, you can add a GPS module that plugs into the Atom S3. This is the GPS Base v2 module for $10 or the GPS Base for $30 if you also want an SD card reader to record wind speed data locally. In summary: The overall scheme would be something like this: Now it remains: to write the code to insert into the Atom S3 to retrieve the data from the VMeter and send it via the ESPNow protocol to the receiver on land. to model in 3D a box allowing this material to be positioned, under the base of the anemometer

Why Autonomous Buoys? Make organizing regattas easier : position up to 6 buoys in just a few moments, effortlessly. Adapt the course to real conditions : define your regatta according to the wind and the body of water. Gain autonomy : the buoys move and position themselves on their own to mark the route. Parcours type de régate VRC Why did you create these buoys? Traditional buoys require a boat to be launched, with the risk of damaging the seabed from the anchor. Setting up a route takes about 30 minutes, and it takes just as long to adjust it if the wind changes. Today, major regattas like the America's Cup and the Sail GP already use autonomous buoys. We took on the challenge of designing autonomous buoys that are accessible and suitable for radio-controlled sailboats. How does it work? Installation of up to 6 autonomous buoys is done in 3 simple steps : Define the route and GPS positions of each buoy. Thanks to a dashboard available on smartphone, tablet or computer , you can: send commands to all buoys or to a specific buoy monitor the status and data of each buoy in real time 2 – Communication with each buoy via the internet, with a SIM card (LTE protocol) in each Buoy, to transmit its target GPS position. 3 – Autonomous movement of each buoy towards its GPS position, then precise maintenance of this position thanks to the automatic piloting of the Buoy. A short video is worth a thousand words Tous les paramètres des bouées sont montrées dans un dashboard sous Grafana

Replay of a training race at La Sourderie on 08/31/2025

Transform your VRC workouts into connected experiences Imagine your traditional buoys equipped with anemometers that continuously measure the wind. Each RC boat has a GPS that sends its position, second by second. On land, a central station captures all this data, displays it in real time, and records it automatically. 👉 While sailing, you instantly follow the wind speed and the trajectory of your boats. 👉 After training, you replay each maneuver using the Replay function and analyze your performance. To achieve this, you need 4 components: Anemometer on buoys One or more anemometers can be installed on conventional buoys. They regularly transmit their wind measurements to a receiver box located on land. This box centralizes and records all the data. GPS on RC boats Similarly, every RC boat can be equipped with a GPS. While sailing, positions are sent continuously (usually every second) to the receiver on land. Receiver on land The land-based receiver is the heart of the system. Equipped with a display and an SD card, it simultaneously receives data from the anemometers and GPS units and records them. Visualization and Replay The information can be displayed in real time on the receiver. It can also be exported for later analysis, allowing navigation to be replayed and studied in the form of a Replay. The macro architecture of the solution is shown in the diagram below What equipment for the ground receiver? There are, of course, many options. Here we choose a 5-inch tablet from M5Stack under the reference Tab5 at $60 with a battery. It offers the following advantages: Good size touch screen to display data Built-in microSD card reader Based on an ESP32 that supports the ESPNow protocol, able to communicate over a distance of approximately 100 meters outdoors

Module pour traduire la tension en entrée du voltmètre en vitesse de vent The first prototype is functional: It recovers the input voltage from the voltmeter (simulated here while waiting for the anemometer) It translates the tension into wind speed by a configurable law It has an autonomous power supply by a small 3.7V Lipo battery which recharges via USB It broadcasts the following data: Object type: anemometer Anemometer ID Measured Wind Speed Timestamp Afficheur au niveau de la télécommande pour visualiser les données en temps réel et les stocker sur une carte SD pour analyse à froid The data sent by the anemometer is received by a display on the remote control, at the same time as the data from the boat, to cross-reference wind speed and boat speed. The "Record" button allows you to record real-time data on an SD card, so that it can be analyzed later. GPS positionné sur un bateau RC The boat's GPS is also functional: It now has a self-contained power supply and no longer depends on the boat's main battery It also sends the GPS location and speed of the boat to the display module at the remote control.