Wireless communication between accelerometers and Arduino

Projects General Guidance
1

Hello,

We are a student team of beginners in arduino. And for a school project we want to send information from an accelerometer to an arduino board by a wireless communication.

We have read some topics on bluetooth and VirtualWire (RF transmitters and receivers).

But those methods are using two arduinos, one connected to accelerometer who send the information to other.

We are wondering if we can send the information wirelessly from the accelerometer to an arduino ?
(Without using two boards)

Thanks for your help !

PE24 team

2

We are wondering if we can send the information wirelessly from the accelerometer to an arduino ?
(Without using two boards)

No.
This is because to get the data out of an accelerometer you need a processor of some sorts, it can not talk directly to a transmitter.

3

Ok, thank you for your answer.

Grumpy_Mike:
This is because to get the data out of an accelerometer you need a processor of some sorts

In that case, we are looking for a processor of small size, because we want to make a device that can be incorporated in a wristwatch.

What do you suggest ?

4

Build the device first, then figure out how to make it smaller.

An ATMega328 chip (as used in Arduino) will fit in a wristwatch.

5

Arduino Pro Mini boards are pretty small. They come in both 5v and 3.3V version. (You can get clones for about $3 on ebay.)

If you use a Pro Mini, you'll need a USB to serial device. These cost another couple of dollars.

The Nano is a little larger than a Pro Mini and includes a USB connection. IMO, the Nano would be a good board for this sort of project.

There are lots of inexpensive nRF2401+ modules (here's clone). I've removed the headers on these modules to make them even smaller. If the normal nRF24L01+ are too big you could use this, even smaller, module (another clone).

There are lots of Arduino nRF24 examples around to help get you started learning to transmit data.

6

This is even smaller