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Make a pair of bluetooth-enabled devices that communicate with one another? Answered

My question is if it's possible to build such a pair of devices, that would sustain a two-way communication channel between them. Basically, both devices would have to be a central AND a peripheral. Specifically, I need it for testing their reactions to each others proximity. (So that they would both need to react simultaneously.)
And if it's possible, how?
(At least some literature.)
Thanks!

Discussions

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tgferreira184

5 years ago

Why not a simple pair of walkie-talkies, maybe modified to be a bit smaller.

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dehumanisetgferreira184

Answer 5 years ago

can walkie-talkie sender/reciever modules (at least roughly) detect distance from each other?

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tgferreira184dehumanise

Answer 5 years ago

I am no expert in that area, but maybe somehow you could make work as a gps, sending signals to each other and calculating the distance from the time it took for the signal to come back.

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dehumanisetgferreira184

Answer 5 years ago

I thought about that as well, but that would require more serious hardware, a powerful antenna or a sim card, and it would have a serious power demand. I'm looking to make the simplest possible (also smallest possible - wearable) device, with low power consumption (it would be solar or rf powered).

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dehumanisesteveastrouk

Answer 5 years ago

What else could you use for both sided wireless proximity detection?

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dehumanisesteveastrouk

Answer 5 years ago

Correct me if i'm wrong, but zigbee seems too complicated and high-level for simple low-level proximity detecting hardware.

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steveastroukdehumanise

Answer 5 years ago

You're wrong. Zigbee is a lot easier to implement peer-to-peer things on than bluetooth. Its one of the things it was DESIGNED to facilitate, over BT.