Connecting multiple 9DoF IMU's to Arduino wireless

Projects General Guidance
1

Hi,

I want to build a prototype of a project i've been working on. I need to stream orientation data gathered by 4 IMU's (which are strapped to a person) directly to my computer.

I'm new with this kind of projects so before I buy anything I want to make sure i'm on the right track and see if this is the best way.

I was thinking of using SparkFun 9DoF Razor IMU M0 (SparkFun OpenLog Artemis - DEV-16832 - SparkFun Electronics) together with a bluetooth mate to directly send the data to my computer. Because this IMU already has a micro processor build in it i wont have to use an arduino.
However, this would mean my computer receives 4 different bluetooth signals at once and I'm not sure if that will work?

So another solution could be to use an arduino which is connected with 4 IMU's trough wires. And then the arduino sends out 1 signal via bluetooth to my computer? In this case I could use a SparkFun IMU Breakout - MPU-9250 ( SparkFun 9DoF IMU Breakout - ICM-20948 (Qwiic) - SEN-15335 - SparkFun Electronics) together with an arduino mini or something like that.
The downside of this is that al the IMU's strapped to the person are connected with wires.

Third option could be a combination of these two. Every IMU sends a bluetooth signal to an arduino which sends 1 signal to my computer (whether or not with bluetooth).
But then still the arduino needs to receive 4 bluetooth signals at once and I don't know if that is possible?

These are the solutions I could think of but maybe someone with more experience could give me some advice on how to do this? Any tip is greatly appreciated!

Thanks!

2

As far as I can see, the Razor IMU should do what you want.

Bluetooth should handle collissions, I don't see a problem here.

Consisder that each module requires a power source (battery), strong enough to support (continuous) bluetooth transmissions.

3

Thanks for your reply!

So if I use 4 razor IMU M0 with bluetooth mates and batteries I should be able to stream data directly to my computer, without using an arduino?

Another option, maybe cheaper, is using 4 MPU 9250 together with a bluetooth mate and battery for each IMU and then send it to an arduino which is connected to my computer.

or, maybe a bit more devious, every MPU 9250 connected with a small arduino and bluetooth mate and battery.

Al these options should work right?

I'm also trying to do it as low-priced as possible, so I'm looking for different possibilities.