user16459: I have an Arduino Uno connected to an HC-05 Bluetooth sender/receiver chip. I am trying to create a Bluetooth connection between my Acer laptop running under Ubuntu 14.04 LTS and the HC-05 chip.
Ubuntu detects the HC-05 chip, as can be seen below.
phodor@ubuntu: hcitool scan
Scanning ...
    11:22:33:44:55:66   HC-05

I am able to create a pair between my laptop Bluetooth device and the HC-05 chip. However, I am unable to create a connection with that pair from the Ubuntu interface. The "Connection" button cannot be clicked on, as you can see on the figure below.
I tried creating a connection using the terminal, but after that the terminal still did not detect any connection.
phodor@ubuntu: sudo hcitool cc 11:22:33:44:55:66
[sudo] password for phodor: 
phodor@ubuntu: hcitool con
Connections:

I also checked that my computer Bluetooth device was working.
phodor@ubuntu: hcitool dev
Devices:
    hci0    AA:BB:CC:DD:EE:FF

Any idea why the connection cannot be created ? Any idea on how to do it using the Ubuntu interface or the terminal ?


user78126: You can find the answer in the Bluetooth connection to HC-05 paired but not connected
Step;
1.Once you have paired the HC-05 as you've described, bind the device by entering;
sudo rfcomm bind 0 "MAC address" 1

2.To trigger the connection & display the data using minicom, run;
sudo minicom -D /dev/rfcomm0

You'll notice that port /dev/rfcomm0 will be available from the arduino IDE as well.
3.To exit minicom, press ctrl+A and then X.

16459: <p>I have an Arduino Uno connected to an HC-05 Bluetooth sender/receiver chip. I am trying to create a Bluetooth connection between my Acer laptop running under Ubuntu 14.04 LTS and the HC-05 chip.</p>

<p>Ubuntu detects the HC-05 chip, as can be seen below.</p>

<pre><code>phodor@ubuntu: hcitool scan
Scanning ...
    11:22:33:44:55:66   HC-05
</code></pre>

<p>I am able to create a pair between my laptop Bluetooth device and the HC-05 chip. However, I am unable to create a connection with that pair from the Ubuntu interface. The "Connection" button cannot be clicked on, as you can see on the figure below.</p>

<p>I tried creating a connection using the terminal, but after that the terminal still did not detect any connection.</p>

<pre><code>phodor@ubuntu: sudo hcitool cc 11:22:33:44:55:66
[sudo] password for phodor: 
phodor@ubuntu: hcitool con
Connections:
</code></pre>

<p>I also checked that my computer Bluetooth device was working.</p>

<pre><code>phodor@ubuntu: hcitool dev
Devices:
    hci0    AA:BB:CC:DD:EE:FF
</code></pre>

<p>Any idea why the connection cannot be created ? Any idea on how to do it using the Ubuntu interface or the terminal ?</p>

<p><a href="https://i.stack.imgur.com/dCsJp.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/dCsJp.png" alt="enter image description here"></a></p>
 78126: <p>You can find the answer in the <a href="https://askubuntu.com/questions/721954/bluetooth-connection-to-hc-05-paired-but-not-connected/1350834#1350834">Bluetooth connection to HC-05 paired but not connected</a></p>
<p>Step;</p>
<p>1.Once you have paired the HC-05 as you've described, bind the device by entering;</p>
<pre><code>sudo rfcomm bind 0 &quot;MAC address&quot; 1
</code></pre>
<p>2.To trigger the connection &amp; display the data using minicom, run;</p>
<pre><code>sudo minicom -D /dev/rfcomm0
</code></pre>
<p>You'll notice that port /dev/rfcomm0 will be available from the arduino IDE as well.</p>
<p>3.To exit minicom, press ctrl+A and then X.</p>
