# DroneEngage Custom Plugin

Writing a Custom Plugin allows you to write a module that can handle hardware parts such as GPIO or sensors, or writing a module that performs data processing, such as processing images from the camera module for example.
Once you write this module and integrate it to the system using [Databus library](https://github.com/DroneEngage/droneengage_databus), you will be able to access that new module from even remote units, and the [Web Client](../../de-web-client.html).

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## The Code

There are two parts of the code you need to understand if you want to make a custom plugin.

### Broker Code

The **broker code**, which is part of the Communicator Module, and this part you do not need to go deeply into unless you need to make a complex plugin.

**Source Code:** [https://github.com/DroneEngage/droneengage_communication/tree/master/src/de_broker](https://github.com/DroneEngage/droneengage_communication/tree/master/src/de_broker)

![Broker Diagram](../../images/broker_cpp.png)

![Broker Diagram](../../images/broker_cpp2.png)

### Drone Engage Plugin Code

This is actually the part of code that you will include into your plugin. Your plugin can be written in C++, Node.js, Python, or any other language, however the available plugin templates are in C++, Node.js and Python.

**Source Code:** [https://github.com/DroneEngage/droneengage_databus](https://github.com/DroneEngage/droneengage_databus)