how many HC-06/05 connections can I have?

Using Arduino Networking, Protocols, and Devices
1

Hi people,

i have found on internet only examples and tutorials for serial connections for HC-06 or HC-05 bluetooth modules, but id like to make connection where is one HC-05 as master conected to several HC-06 devices which can be used for sending or receiving data to/from HC-06 master module. As far as i know bluetooth is able to connect up to 7 devices

Could you guys guide me where i should start, where i can find some useful documentation, tutorial or example?

thank you all for any help.

2

You might be able to do what want but I submit that it would be more trouble than it is worth and would not be something to brag about. You might be better off using the NRF24, which is similar in every respect to the HC-0x except that it is designed to be used in the manner you propose.

If you do use bluetooth, you are probably better off using HC-05s throughout.

3

I have a question about this subject. Is it possible to receive multiple connections from a single master bluetooth module. like this setup? i do use the nrf24l01+ modules my self but was seeing some stuff from bluetooth on this subject? On the other hand using the esp8266 can connect multiple connections using wifi with no problem even other esp modules from one to another using the ide software.

4

You might find this useful

You might also re-read the first sentence of my previous.

I guess a bluetooth network can be run if the slaves are not normally communicating at all, and the master establishes short connections in sequence.

5

Thank you for your reply. NRF24 is good, but there is a problem that there is no security if u compare it with HC-05 (i havent found any security solution so far) and also NRF24 cant receive and transmit data at the same time. Yes you can handle it in your server with for the instance read data and if you want to send data, stop reading and send what you need and then continue wit reading. But for this kind of reading and sending data need queue for incoming messages, i havent find this kind of solution. I work with java and with python or c just a bit, so its complicated for me to build up my own server because most NRF24 libraries are c or python.

6

someuser:
there is no security if u compare it with HC-05 (i havent found any security solution so far) and also NRF24 cant receive and transmit data at the same time.

Interesting point. I was not aware of that problem but I would imagine you could build some password procedure into the programme. I have never used my NRF24s as I have always found bluetooth adequate, but I'm just a datalogger. I don't think bluetooth can transmit and receive at the same time either.

7