The new season will see some technical changes to the general regulations. Please take a good look at them.

Note: this is an excerpt from the new rules for RoboMission. The complete set of rules with further important rule changes compared to the previous year will be published together with the 2025 competition tasks on January 15. You can definitely expect the following news:

  • Lego robots are no longer the only ones allowed.
  • The robotic system can be chosen freely.
  • In order to be able to check the robots better on the day of the competition, each team must submit a technical summary of its own robot (robot profile) in advance. The robotics set, sensors, actuators and other systems used are specified.
  • As in previous years, the same size restriction applies: a robot may not exceed the dimensions 250 mm x 250 mm x 250 mm (including cable).
  • As the robots no longer have to be assembled on the day of the competition, the schedule also changes. This will be published at least two weeks before the respective Regional Competition.
  • Qualification for the Swiss final is based on an overall ranking of all Regional Competitions. The WRO Switzerland OC reserves the right to change the mode.
  • The qualified teams will be published on the homepage and informed personally by Monday, May 26, 2025 at the latest.

What materials can be used to build robots?

The robot may be built from any materials and components as long as the following criteria are met:

 

Total weight ≤ 1.5 kg
Battery ≤ 8 000 mAh
The manufacturer’s instructions and specifications for the use of batteries must be followed.
Voltage of the electrical components ≤ 18 V
Amperage ≤ 5A
Start and stop button One (1) obviously recognizable button is required to start and stop the robot. This means that the same button that is used to start the robot is also used to stop the robot. The start and stop buttons must be located on the outside of the robot (not underneath) and must be easily recognizable and accessible. A physical button is preferable to a button on a touchscreen. If the button is pressed during the run, any movement must be stopped immediately.
Exception: The separate stop button on the EV3 may also be used to stop a program.
Sensors In general, there are no restrictions on the type or number of sensors, but some sensor types are restricted to certain age groups. The use of cameras is restricted to the age groups Junior and Senior. The use of LIDAR and other 3D scanners is restricted to the age group Senior.
Motors There are no restrictions on the type of motors. The number of motors is limited in the various age categories as follows:
Elementary4 motors
Junior: 5 motors
Senior6 motors
Wheels and tracks All types of wheels (including omni wheels) or tracks can be used. They must be designed in such a way that the playing field mat is not damaged. In particular, pointed and metallic contact surfaces are prohibited. The wheels must not leave any sticky material on the playing field mat.
Mechanical components
(risk of injury)		 Mechanical components must be designed in such a way that they do not pose a risk of injury. Robots that pose a risk of injury must be changed without discussion at the request of the judges or will be excluded from the competition.
Electrical and electronic components
(risk of injury)		 Electrical and electronic components must be designed in such a way that they do not pose a risk of injury. Robots that pose a risk of injury will be excluded from the competition. Modifications are only permitted if there is no risk of injury to the participants.
Gases Only atmospheric air may be used. All other gases are not permitted.
Liquids No liquids may be used. This also applies to oil or other lubricants.
Spray bottles / aerosol bottles It is not permitted to use spray bottles with liquids or gases. This applies in particular to cooling spray/ice spray and lubricants.
Pneumatic systems Pneumatic systems can be used. They can be filled by the robot itself after the start or manually before the start. The maximum pressure must not exceed 3 bar. If the system is specified for a lower pressure, this specification applies as the upper limit. The maximum volume for tanks in the system is 150 ml. A compressor for the pneumatic system counts as a motor.
Hydraulic systems Hydraulic systems are not permitted.
Fragile materials Do not use materials that can easily break into many pieces or that leave dangerous edges after breaking, such as glass.
3D-printed materials 3D-printed materials and parts can be used. 3D printing during the competition is not permitted.
Laser The use of lasers is restricted to lasers that do not pose a safety risk (≤ Class 1M). A certificate is required stating that the laser is safe for the eyes.
Important note and FAQs If a team brings radically new ideas to the RoboMission category that are very different from the old approaches, these should be discussed with the National Organizer/Chief Judge (or they should clarify them with the WRO Association).
There will be updates and additions to this table in the FAQs. Check these regularly: https://wro.swiss/faq-de/

Can I continue to take part in the RoboMission competitions with my robot (Lego Spike Prime or EV3) from previous years?

Yes, participation with robots from previous years is very possible. The new specifications were developed with the aim of enabling LEGO robots to continue to participate competitively. However, the new rules need to be examined in detail. For example, the number of motors is limited to 4 in the Elementary age group, 5 in Junior and 6 in Senior. In the past, only the number of ports represented a maximum limit.