connecting more than 2 HC-05 together

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I am trying to make a connection between 3 BLUETOOTH HC-05 modules, in which 2 separate micro-controllers collect different data from sensors and then each one sends its data to the the third micro-controller, and also the third micro-controller receives data from a mobile phone via bluetooth too. can I make this connection using HC-05 modules.

Last Edited: Wed. Nov 7, 2018 - 07:14 PM
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No, Only one device can be connected at time, but you can try the following scheme, what you refer as "third micro" should be the one connecting to all devices in turns.

  1. Connect to first data collector and get data
  2. disconnect
  3. Connect to second data collector and get data
  4. disconnect
  5. Connect to mobile and do whatever
  6. disconnect
  7. Repeat.

 

The data will be far from realtime data and mobile can't initiate connection whenever it wants in this kind of setup, but i believe this would be by far the easiest way to implement such "network" with these modules.