====== How to Set Up micro:bit with Blocks in the Robotical Web App ======

If you have recently had micro:bit paired over USB to MakeCode, you will need to unpair from MakeCode. Instructions about how to unpair micro:bit from MakeCode are at the bottom of this page:[[https://makecode.microbit.org/device/usb/webusb|How to reset your micro:bit]].

If this is your first time using your micro:bit with Blocks, you will need to install the Blocks for micro:bit software.

===== Setting up your micro:bit =====

1. Go to the [[https://robotical.app/blocks|Robotical Blocks Web App]].

2. You can use micro:bit with the Blocks coding platform to control a physical device, such as Marty or Cog, or to control a sprite on screen. Use the **Sprites** or **Devices** selectors on the right-hand side of the screen to switch between sprites and devices.

{{:martyv2:userguides:microbit:sprites_or_devices.png?400|}}

3. Connect your micro:bit to your computer using a micro USB cable.

4. To add the micro:bit extension to Blocks, click the blue **Extensions** button in the bottom-left corner of the screen. Then select the micro:bit extension from the extensions page.

{{:martyv2:userguides:microbit:extension_button.png?400|}}

5. A pop-up window will appear with two options: **Connect** or **Install software**.

{{:martyv2:userguides:microbit:connect_or_install.png?400|}}

6. To install the software, click **Install software**. You will then have two options: update the software directly through your browser or download the .hex file and drag it onto the micro:bit's drive.

{{:martyv2:userguides:microbit:install_or_download_hex.png?400|}}

7. A pop-up window will ask you to connect your computer to your micro:bit. Select your device from the list and click Connect.

{{:martyv2:userguides:microbit:microbit_computer_pop_up.png?400|}}

8. The LED beside the USB port will flash orange while the software is being installed. Once the installation is complete, your micro:bit will scroll a five-letter name across its LEDs.

===== Connecting your micro:bit =====

9. If the Blocks for micro:bit software is already installed, or you have just installed it successfully, click **Connect** instead. A pop-up window will ask you to pair your micro:bit. Select your device and click **Pair**. Your micro:bit's name will also scroll across its LEDs, helping you confirm that you have selected the correct device.

{{:martyv2:userguides:microbit:microbit_bluetooth_pair.png?400|}}

{{:martyv2:userguides:microbit:screenshot_2026-10-02_at_15.13.44.png?400|}}

10. Once connected, a pop-up window will confirm the pairing, and a green tick icon will appear. The micro:bit blocks will also appear on the left-hand side of the screen.

11. Let's make sure it worked! Test your connection by dragging an "On Button Press" block from the green micro:bit blocks on the left of the screen into the coding area.Then add a movement block from the blue blocks. When you press the "A" button on your micro:bit, your sprite should move across the screen according to the movement block you have chosen.

{{:martyv2:userguides:microbit:screenshot_2026-10-02_at_15.16.40.png?400|}}

12. You're all set! You can continue to power your micro using the USB cable or connect a battery to power it independently.