imported>OCDoc Import: Imported from legacy OpenComputers documentation at ocdoc.cil.li

2026-08-24T08:08:27Z

Imported from legacy OpenComputers documentation at ocdoc.cil.li

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= Component: Microcontroller =

This is the component provided by the [[Block/microcontroller|Microcontroller Case]].

These callbacks can only be called by the microcontroller itself, or its direct neighbors (i.e. other computers that share a face with the microcontroller). Note that since microcontrollers cannot access external components they cannot interact with each others microcontroller components, but a computer can access a neighbouring microcontroller.

Component name: `microcontroller`. Callbacks:

* `setSideOpen(side: number, open: boolean): boolean`

<pre>Set whether network messages are sent via the specified side.
</pre>
* `start(): boolean`

<pre>Starts the microcontroller. Returns true if the state changed.
</pre>
* `isRunning(): boolean`

<pre>Returns whether the microcontroller is running.
</pre>
* `isSideOpen(side: number): boolean`

<pre>Get whether network messages are sent via the specified side.
</pre>
* `lastError(): string`

<pre>Returns the reason the microcontroller crashed, if applicable. Returns nil if no crash has occurred.
</pre>
* `stop(): boolean`

<pre>Stops the microcontroller. Returns true if the state changed.
</pre>
{{:Component/contents}}

Component/microcontroller - Revision history

imported>OCDoc Import: Imported from legacy OpenComputers documentation at ocdoc.cil.li