Important update – In June 2023 LEGO decided to update the Powered Up app with a new code block design, and in July they provided their own block guide that is accessible here. Their page has the most frequent blocks described, and you can find a link on that page with a pdf that has all the new blocks. The guide below is useable with the 3.x.x version of the app.
This is the full code block guide for the LEGO® Powered Up app.
Latest update: 04/29/2020
App version used: 3.1.1
Usage
This is the extended version of the code block guide. Click here for the simple version with an easy navigation interface.
In this version you have the following options:
– filter columns – use the Column visibility button to toggle the columns
– search – use the search text box to filter for any expression (e.g. block category)
– change the number of rows – use the Show x entries drop down to change the rows displayed. Only advised to increase on a touch screen interface where the table can be scrolled horizontally without the slider on the bottom.
Glossary
Simple motor – a Powered Up motor that only has power regulation, like the 45303 Simple Medium Linear Motor
Tacho motor – a Powered Up motor that has an internal encoder and has speed and position regulation like the 88008 Medium Linear Motor or the L / XL motors.
Slider interface – one of the controller interfaces in the Free Code area of the Powered Up app with 2 sliders and 3 buttons
Race Car interface – one of the controller intarfaces in the Free Code area of the Powered Up app with 1 joystick and 4 buttons
Composite Block – a block that contains one or more program sequences
Disclaimer – This guide is partially based on a document received from LEGO® Customer Service, additional information and examples were added based on the Powered Up app and my experience.
| Block Image | Block Category | Block SubCategory | Block Name | Description (official / my notes) | easy | medium | hard | App version | Example | Example (code) | Notes |
|---|---|---|---|---|---|---|---|---|---|---|---|
 | Flow Blocks | Start | Starts the execution of the attached sequence when the block is clicked or when the program starts. | x | x | x | 2.1.0+ | Starts the sequence that sets the motor power on port A to 50 |  | ||
 | Flow Blocks | StartOnTrue | Starts the execution of the attached sequence when the condition is true. | x | x | 2.1.0+ | If Slider 1's position is not 0 then sets the light intensity on port D to 100% |  | |||
 | Flow Blocks | StartOnEdge | Starts the execution of the attached sequence when the condition switches from false to true. | x | 2.1.0+ | If Slider 1's position is changed from 0 then play the car start sound |  | ||||
 | Flow Blocks | EventStart | Starts the execution of the attached sequence when the flag number is triggered. | x | x | 2.1.0+ | The Start sequence begins first, sets the light intensity on port D to 100% then triggers the "Flag 1" sequence that sets the motor power on port A to 50. |  | |||
 | Flow Blocks | EventTrigger | Triggers flag number. | x | x | 2.1.0+ | The Start sequence begins first, sets the light intensity on port D to 100% then triggers the "Flag 1" sequence that sets the motor power on port A to 50. |  |