Underwater WSN

Projects General Guidance
1

Hi,

I am new to Arduino. Could someone give me advice on what boards and sensors i can use from Arduino for this project. I would like to have a wireless sensor network under water, hence couple of sensors that can communicate with each other underwater (probably using acoustic) and with the base above water.

Thanks
Bana

2

I don't know anything about underwater communication. Is Infra Red an option - that is easy with an Arduino.

...R

3

Is Infra Red an option

No, not really - red is one of the first colours to be absorbed by water.

4

See: http://my.fit.edu/~swood/John%20Claus%20Technical%20Paper.pdf

About 1/3rd the way down is where it starts getting good.

5

AWOL:
No, not really - red is one of the first colours to be absorbed by water.

From the depths (pun intended) of my ignorance, does that suggest the UV would work?

...R

6

Robin2:
From the depths (pun intended) of my ignorance, does that suggest the UV would work?

...R

Only in the Black Sea.

7

Chapter and verse (and worse).

8

AWOL:
Chapter and verse (and worse).

Does all that mean that visible light would be best?

...R

9

I'd say no light is good in water, except in very controlled conditions.
Even in very shallow water, suspended particles cause scattering, and if the particles are anything like the lake I train in, conditions can go from 10m visibility to can't-see-hand-in-front-of-face visibility in the space of a careless fin kick or dropped flashlight, and that's in no more than 10m depth.

10

Sound is the best communications method underwater. I've read that whales can communicate over thousands of miles that way.

11

AWOL:
to can't-see-hand-in-front-of-face visibility

I am always amazed that Herons can catch fish in muddy water.

...R

12

Low Frequency RF

13

I don't think herons have evolved that yet :wink:

(sp. "ULF")

14

How many posts can the regulars get in before the OP comes back?

15

Thanks everyone! Specially with the document from Chagrin.

Acoustic seems to be the best option.
Appreciate it.

16

Bana:
Thanks everyone! Specially with the document from Chagrin.

Whew. I was starting to think it was completely overlooked.

17

Chagrin:
Whew. I was starting to think it was completely overlooked.

It really helps to make links clickable.