user40601: What I want to do is to create a temperature measurement bracelet that you wear on your wrist.
So it takes data from the sensors and sends them to the PC.
What I am using to do that:

an Arduino Uno
a temperature sensor
a Bluetooth module to connect with Arduino Uno
a mobile phone
a PC

I will connect Arduino Uno with the Bluetooth module so it sends data to the mobile for example.
Since I am a beginner I do not have it very clear. Do I need a GPRS SIM (SIM900A for example or whatever) for this to function or just the Bluetooth connection is enough?
Specify that the question is very basic because I am a beginner.

user27653: Assuming the mobile device to which you are connected by bluetooth is always kept near the bracelet, you don't need a GPRS module. The mobile device, then, would use it's network connection (either GPRS, LTE, WiFi, etc.) to communicate the data to the PC for processing or storage.

40601: <p>What I want to do is to create a temperature measurement bracelet that you wear on your wrist.
So it takes data from the sensors and sends them to the PC.
What I am using to do that:</p>

<ul>
<li>an Arduino Uno</li>
<li>a temperature sensor</li>
<li>a Bluetooth module to connect with Arduino Uno</li>
<li>a mobile phone</li>
<li>a PC</li>
</ul>

<p>I will connect Arduino Uno with the Bluetooth module so it sends data to the mobile for example.
Since I am a beginner I do not have it very clear. Do I need a GPRS SIM (SIM900A for example or whatever) for this to function or just the Bluetooth connection is enough?</p>

<p>Specify that the question is very basic because I am a beginner.</p>
 27653: <p>Assuming the mobile device to which you are connected by bluetooth is always kept near the bracelet, you don't need a GPRS module. The mobile device, then, would use it's network connection (either GPRS, LTE, WiFi, etc.) to communicate the data to the PC for processing or storage.</p>
