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Ultimate Vending Machine Control

Displays amount of each item in vending machine and number of slots used, and maintains minimum and maximum​. It requires stack pre-programming. The stack format is:

Item #1 Quantity
Item #1 Minimum
Item #1 Maximum
Item #1 ItemHash
Item #2 Quantity
Item #2 Minimum
Item #2 Maximum
Item #2 ItemHash
...

Take a look at my "Ingot Storage Stack Writer" or "Ore Storage Stack Writer" for examples of stack writing programs. The order is backwards compared to how others do stack writers for efficiency purposes, so that the item hash comes at the end. The define "STACKSIZE" needs to be changed to the number of push lines in the stack writer script.

The devices are:

VendingMachine d0 - The vending machine to control. Required.
QuantityDisplay d1 - An LED display to display the quantity of the selected item. Required.
UsedSlotsDisplay d2 - An LED display to display the number of slots used in the vending machine. Required.
ItemRequest d3 - An external memory (or other device) to tell an external system to produce an item. Optional.
OutputSorter d4 - A sorter to sort ejected items if there is too much of a certain item in the vending machine. Optional.
VendButton d5 - A button to press to vend the selected item. Optional.

A dial is batch read to select the item. It is theoretically optional, but without it you won't be able to change the selected item. You should also create a console with a hash display and configure it to read the IC10 housing, so you can see what item is currently selected.

Whenever the import or export count of the vending machine changes, this script automatically re-counts the items in the vending machine. Since counting can take a while to complete, the LEDs change to yellow while the counting is taking place and the dial and button will be unresponsive.

If the count of any of the items is less than the minimum for that item, the script will set the device connected to "ItemRequest" to the hash of that item, set the color of the LEDs to red, and wait for the import count to increase. If the count of any of the items is greater than the maximum for that item, the script will eject the item, set the "OutputSorter" to Output 1, set the color of the LEDs to orange, and wait for the export count to increase.

If the minimum and maximum for all the items is satisfied, the script goes into a mode where it will display the count of the number of items for the item selected by the dial, display the number of used slots, and eject one of the items (with the output sorter set to Output 0) if the button is pressed. While it is in this mode, the LEDs will be green.