Redstone Input Port

The Redstone Input Port is an upgrade which allows web pages to read the redstone levels around the screen.

Recipe

The item on the left is a Blank Upgrade.

How to use

Like any other upgrades, install it by right-clicking on a screen with the upgrade in your main hand. You will need the "Link & upgrade" permission to do that.

JavaScript

• The upgrade name returned by GetUpgrades is webdisplays:redinput
• If this upgrade is used in combination with the Redstone Output Port upgrade, the redstone level obtained by any of these queries/callbacks on an emitting block is undefined
• For more information on how to use these queries, check out Screen#JavaScript

Queries

This upgrade adds the following queries:

Query name	Arguments	Return value	Comment
GetRedstoneAt	int, int	{"level":int}	0, 0 is the bottom left block. Rotation is not handled.
GetRedstoneArray	None	{"levels":[int]}	The level of the block at (x, y) is at index y * width + x

Callbacks

This upgrade adds the following callbacks:

• webdisplaysRedstoneCallback(x, y, level) will be called if the redstone level of the block at x, y has changed.