Using Bluetooth HC-05 to transfer data from an arduino board to phone

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1

I'm currently doing my final year project which is about making a wearable for baby monitoring. The arduino board that I have purchased for this project is the Lilypad Arduino 328 Main Board. I wanted to know what is the cheapest way of transferring data from the sensors that are attached to the arduino board to a phone. I found out that the bluetooth HC-05 is a cheap option but i was wondering if it is possible to transfer data from this arduino board to an app on the phone using this bluetooth? How can I display the data on the phone? Any of your suggestions and advices are much appreciated!! Really need help :frowning:

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Hi Pearllpy,

I just started using the Arduino Uno and have done a couple easy and small projects with the HC-05 Bluetooth module (ZS-040).

The basic functionality for getting information from the HC-05 BT Module to your smartphone comes from different smartphone apps that essentially turn your smartphone into a Bluetooth Terminal. Then, your Arduino code directs the information to the "Serial" connection, which is really just the Bluetooth terminal.

In the attached example (which I documented pretty well), I have a Temperature and Humidity sensor sending information to my smartphone via the HC-05 BT module.

Hope it helps.

-noegoeo

BT_TEMP_SENSOR.ino (4.96 KB)

Output to the Bluetooth Terminal.png
Output to the Bluetooth Terminal.png1080×1920 183 KB

3

Pearllpy:
I found out that the bluetooth HC-05 is a cheap option but i was wondering if it is possible to transfer data from this arduino board to an app on the phone using this bluetooth?

If the phone is an Android device then, yes the HC-05 will work fine.

Pearllpy:
How can I display the data on the phone?

You need an app on the phone to display the received data.

It looks like neogoeo has an example of how to do this.

I've used App Inventor 2 to make Bluetooth apps. I have mixed feelings about AI2. It's pretty easy to use but it's also awkward to have to deal with an online, graphical IDE.

4

noegoeo:
Hi Pearllpy,

I just started using the Arduino Uno and have done a couple easy and small projects with the HC-05 Bluetooth module (ZS-040).

The basic functionality for getting information from the HC-05 BT Module to your smartphone comes from different smartphone apps that essentially turn your smartphone into a Bluetooth Terminal. Then, your Arduino code directs the information to the "Serial" connection, which is really just the Bluetooth terminal.

In the attached example (which I documented pretty well), I have a Temperature and Humidity sensor sending information to my smartphone via the HC-05 BT module.

Hope it helps.

-noegoeo

Thanks noegoeo! your suggestions and example really help :slight_smile: I really appreciate it!

5

Is it possible to log the data sent to mobile phone and save it as .txt or any other format.

6

Virtually any bluetooth terminal app can do that. It sounds like you've got the only one that doesn't.

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anoojgandham:
Is it possible to log the data sent to mobile phone and save it as .txt or any other format.

Don't cross-post. transfer data from arduino to andriod using HC-05 - Networking, Protocols, and Devices - Arduino Forum

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