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Controllable 3-Harvie-Controller

Here I present you another 3-Harvie-Controller - but with a twist: You can control it at runtime.

This script has 3 configurable modes: Work mode, fertilizer mode and power mode.
Each mode can be set in the script to inital values, and they can be changed while the IC is running at any time without touching the script again, just by writing a command and a value into the Setting-value of the IC Housing.
The script can process one command per tick. After processing the Setting is set back to 0. So, after writing a command into the Setting you should watch the Setting until it is processed.
This way maybe a Greenhouse atmosphere controller can control the workmode if the gases are unfavorable and switch it back if all is right.
Or maybe if the player gets flooded with seeds he can change the work mode.

Changing the work mode while a plant is in Seed-stage the change cannot be taken into account.

And for those who likes to watch numbers on displays the script can be set into a debug mode. In this mode the current state of the three modes are written to the Setting - ofcourse only after processing any incomming command.

WorkMode - defines how Harvie behaves
Command: 1X - X can be one of the following values
0 - Extinguish life - Harvesting only
1 - Exploiting life - Sowing and harvesting, no seed collection
2 - Sustain life - Sowing, harvesting and collecting 1 seed
3 - Spread life - Sowing, harvesting and collecting all seeds

FertilizerMode - defines how Harvie reacts to fertilizer
Command: 2X - X can be one of the following values
0 - Everything counts - Sowing as soon as possible
1 - Only the Best - Sowing occurs only on fertilized devices

PowerMode - defines if Harvie can smile at you all the time
Command: 3X - X can be one of the following values
0 - The last switches lights off - Harvie is switch on and off as needed
1 - I like Smileys - Keeps Harvies powered

You can setup the controller with three Harvie - Hydroponic device - pairs.
d0-d3 - Pair 1 - Left Harvie, right Hydroponic device
d1-d4 - Pair 2 - Left Harvie, right Hydroponic device
d2-d5 - Pair 3 - Left Harvie, right Hydroponic device
If one device is missing the according pair is ignored. Types of divices aren't checked.

Before sowing the Hydroponic device and Harvie are checked.
There needs to be at least 10 moles of water and the water has to be between 6°C and 59°C.
If fertilizer mode is set to 1 then fertilizer needs to be in the hydroponic too.
And ofcourse Harvie need to have some seed in it's input slot to sow.

If debug mode is set to 1, the Setting shows a 4-digit number.
From left-to-right this number is build this way:
The 1st digit is always a 1 (needed to distinguish from commands).
The 2nd digit is the work mode.
The 3rd digit is the fertilizer mode.
The 4th digit is the power mode.