Technical Support

Something not working? Spend a minute on the pages below first: many problems are solved right there. Still stuck? Fill in the form and one click opens an email with the recipient, subject and layout already filled in. Our engineers reply within 3 business days.

Check these first

❓ FAQCompatibility, competition rules, calibration, pricing and ordering 🚀 Already bought? Find your codePick your controller and software to jump to the right guide and examples 🧩 Interactive tutorialsNo hub needed: step through the code in your browser 📋 Command referenceReadings and commands for every product on every platform ⬇️ DownloadsLibraries, example programs, official app helpers 🔌 Universal I2C protocolArduino, ESP32 and Raspberry Pi: wiring, addresses and registers

Tip
Every product's Examples page ends with a troubleshooting section (no readings, odd values, program errors). It is usually the quickest place to look.

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The form sends nothing to any server: the buttons open an email in your own mail app (or Gmail), and nothing is sent until you review it and press Send. Fields marked * are required; the more you fill in, the better we can answer in one reply.

Category * Product * Edition Controller Software Software version

Sensor firmware version

Where do I find the firmware version?

Pybricks (with the MBC library): print(sensor.firmware_version()), e.g. (1, 0).
Arduino / ESP32 and other I2C: read register F2, 102 = 1.2. See the Universal I2C protocol.
SharpShot Vision: the settings menu on the camera screen.
Can't find it? Write "don't know" and the month you bought it; we will check our shipping records.

How often does it happen? One-line summary * (goes into the subject) What is the problem? * What have you tried? What did you expect? What actually happened? More details

I will attach photos, screenshots or a video (highly recommended: one photo often shows the problem)

Please attach: an overall photo of the wiring plus a close-up of the plugs, the sensor LEDs, and a screenshot of the whole window with your program and the error message. Program files (.llsp3, .py, .ino, .ev3, .mblock…) can be attached too.
🎬 Videos over 25 MB won't send: upload to YouTube (set to Unlisted) or Google Drive and paste the link below.

Video / cloud link

Your name School / organization Country / region

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Photos help most: an overall shot of the wiring plus a close-up of the plugs, the sensor LEDs, and the program with its error message (whole window).
Video: 10–30 seconds is enough; show the robot running and the sensor LEDs. Over 25 MB, paste a YouTube (Unlisted) or cloud link.
Program files: attach .llsp3, .py, .ino, .ev3 or .mblock files, or paste the code into the email.
One problem per email: separate questions get faster, more complete answers.
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