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Sensing blocks is one of the ten categories of blocks. They are color-coded light blue, and are used to detect different factors of a project.

There are currently 20 Sensing blocks: 4 Stack blocks, 5 Boolean blocks and 11 Reporter blocks.


Note Note: Click on a block to visit its individual wiki page.

Scratch 2.0 has the following 4 Sensing Stack blocks:

Scratch 2.0 has the following 5 Sensing Boolean blocks:

Scratch 2.0 has the following 11 Sensing Reporter blocks:

PicoBoard Blocks

Main article: PicoBoard Blocks
The () Sensor Value block in Scratch 1.4
The Sensor ()? block in Scratch 1.4
The blocks in the 2.0 prealpha

In Scratch 1.4 and other previous versions of Scratch, there was a subcategory called Sensor Blocks, also colored blue, that included () Sensor Value and Sensor ()?. They were used to communicate with external hardware or programs, like the PicoBoard. They were recolored dark grey in the Scratch 2.0 prealpha and only appeared in the Stage's palette.[citation needed] However, they were later re-classified as an extension and made only accessible through the extensions menu.