Term 2 Final Project - Project "Occulus Neptunus Regis 1" a miniature "research ship" to keep an eye on your aquatic life/pets

For this project, we were asked to include a  minimum of two inputs and two outputs, in the form of sensors.

I have chosen a water level/wet sensor and a light sensor. The concept behind my project is to create a floating camera to film pond fish and other lifeforms in ponds and do it in a creative, entertaining way. I have decided to design a polystyrene boat, with a docking/diving bay, in which the waterproofed camera will reside and be dropped from.

I have decided to use both an Arduino and a Raspberry Pi which will perform different functions. The Arduino will control the wet sensor and the light sensor. The wet sensor will be connected to a motor or servo which will drop the camera and the light sensor will detect light levels and illuminate when needed using an LED. The camera will be controlled by a Pi Zero. It will be possible to access live footage via the wireless Raspicam app on a mobile phone or tablet.

If time and budget allow, I will make the boat remote controlled. But primarily, the project objectives of 2 inputs (wet sensor, light sensor) and two outputs (motor, LED) are what I am aiming at to keep the project within budget and timeframe.

So far, the parts, materials and tools sought are (received/owned have "check" next to them):

-Foam cutter (hot knife)
- Polystyrene board (check)
-Silicone Waterproofing Sealant (check)
-Pi Camera (check)
-Pi Camera 25cm or longer cable
-Micro SD card (16GB or 32GB)
-Water Level/Wet sensor with Relay board (check)
-soft wiring
- 4 plastic boxes, possibly more required (check)
-Paint - Blue
-Paint - Black (check)
-Paint - Red
- Arduino Uno or Arduino Mega 2560 (check)
-Cog Wheel set with rackings (check)
-Servo (check but might require a continuous 360 one)
-Motor (check, plenty owned)
-Lithium Batteries (check, may need more powerful ones)


A few other minor components/materials may be required.

Optional (for now):

-RC Tx
-RC Rx
-ESC
-Lithium batteries for RC
-Lithium battery charger

Some rough sketches/plans below as well as some photos of main components:

Water Level Sensor with Relay

Raspberry Pi Camera with cables 

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First rough sketches

For now, the objective is to code the wet level with the Arduino Mega, to make it respond to water and trigger a motor/servo. Once achieved, I will move on to insulating components and install them on the boat.