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Send message to LED matrix using Bluetooth

The next iteration of the LCDMatrix in the earlier post is to add a Bluetooth module HC-05 to the Arduino. This will allow us to send message to LED matrix using bluetooth.

The bluetooth module will need to be connected to the Arduino via the following:

  • Pin 2 is connected to the RX of HC-05
  • Pin 1 is connected to the TX of HC-05

Once this is done, we need to initialise the Bluetooth module to ensure that we can connect to it. In this demo we are using Android app called Bluetooth terminal which allow us to connect to the HC-05 bluetooth module.

You can see it in action in the following clip.

If you are interested to get the source code and the detailed diagram don’t hesitate to let me know.

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