GPIO () is ()?
<gpio (0 v) is [high v]? :: extension>
Category Raspberry Pi GPIO
Type Boolean
Introduced in 3.0

The gpio () is ()? block is a Raspberry Pi GPIO block and a boolean block. Its options for the first input are the numbers 0 through 27, with each number representing a GPIO pin. The second options are "high" and "low", representing a state that the pin can be set to. The block returns whether or not the specified pin is in the specified position.