bluetooth transmitters - transmission distance, possibilities and recomendations

Hey guys and gals.

Long time since I’ve posted on this forum excited to get into project again!

So i wondered if anyone on here has much experience using bluetooth transmitters and…

  1. Whether its possible to calculate the distance from a transmitter to a receiver
  2. Would be able to point me in the right direction to look for transmitters to experiment with
  3. Could recommend the best current BT library to start experimenting with
  4. Point me in the direction of some good info to get started experimenting

Thanks,

Rich

rich_brighton: 1. Whether its possible to calculate the distance from a transmitter to a receiver

You can get a bluetooth to determine if another bluetooth is in range - whatever that might be - but, for anything else, I think you are just kidding yourself, and a piece of string would probably be a better option.

You might find the following entertaining http://forum.arduino.cc/index.php?topic=421704.0

  1. Would be able to point me in the right direction to look for transmitters to experiment with

The Tinysine HM-10 modules would be a good choice. They are dirt cheap, easy to configure, and have a range of 30m or so. This latter is because they are BT-4 type. Note that a BT-4 device only operates as BT-4 when it is working with another BT-4 device. If it isn't, it reverts to plain-vanilla BT-2. Another is the ever-popular HC-05, but it is BT-2 and is probably about to be superseded by the HM-10.

  1. Could recommend the best current BT library to start experimenting with

You don't need any libraries. Bluetooth is just serial without wires and Arduino is not involved.

  1. Point me in the direction of some good info to get started

The following background notes are not quite what you want, but may still be useful.

http://homepages.ihug.com.au/~npyner/Arduino/GUIDE_2BT.pdf http://homepages.ihug.com.au/~npyner/Arduino/BT_2_WAY.ino

  1. Whether its possible to calculate the distance from a transmitter to a receiver

No.