1

I need two Arduino units with the HC-06 Bluetooth board to communicate with each other and one of these Arduino units also connected to my Android phone. Is this possible to do with just two HC-06 modules, or even three? Or is there a better solution for this?

To reiterate what is going on here: I have two Arduinos that are running off battery. Arduino 1 is sending data every 0.5 seconds to the Arduino 2. Arduino 2 collects this, adds its own bit of data to it, and then sends this new data packet to my Android phone which will only be connected to Arduino 2.

I haven't completely decided upon what kind of Arduino board to get, but it needs to be fairly small, but I am planning on the Adafruit Pro-Trinket 5v.

Hopefully you get the basic scenario, let me know if you need more clarification and what you think could be done here.

Thanks a lot!

  • Just a thought: If you store data in Bluetooth advertising data, you won't need to do anything fancy with Arduino 2. Have Arduino 1 update its advertising data as often as you want. Have Arduino 2 scan and get the data stored in Arduino 1's advertising data. Then, Arduino 2 can update its own advertising data with the updated data. Scanning and getting Arduino 2's data from Android is do-able. I didn't add this as an answer because I don't know if the HC-06 supports bluetooth scanning (it probably does). – krol Nov 29 '16 at 14:04
  • Why Bluetooth? Why not WiFi? Having direct experience with both, WiFi (nodeMCU) is 100% reliable, simpler (not need to "pair" anything) and versatil (HTTP, MQTT or whatever protocol you like) and you can have multiple connections simultaneously. Bluetooth, is a little PITA. – user31481 Jul 29 '17 at 9:38
-1

Ok

So From Whatever I can Understand you could do this.

  1. make one of the boards talk to a master control board.
  2. make the control board talk to your phone.

Why don't you change your approach

  1. Make the board A communicate with board B with Bluetooth.
  2. Use different pins to setup communication b/w phone and board b.

Arduino to Arduino Bluetooth- http://www.martyncurrey.com/arduino-to-arduino-by-bluetooth/

Arduino to phone via Bluetooth- http://www.instructables.com/id/Connect-Arduino-Uno-to-Android-via-Bluetooth/

PS: - USE DIFFERENT PINS!

1

Should be possible, but only if you setup the Bluetooth module of Arduino 2 as the master. You see, Bluetooth requires to connect to a master. A master can connect to 8 slaves in total. Because Arduino 2 connects to multiple devices (Arduino 1 and your Android device) it should be the master. This also means your Android device cannot connect to any other devices.

Hope this gives you a place to start exploring.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.