Bluetooth serial service

In this article, each of these objects will be referred to as a profile. Descriptors belong to Characteristics and represent properties of that characteristic. Characteristics possess a state that clients interact with by reading, writing, or subscribing to changes of. Services are groups of characteristics. The driving reason for using Serial over BLE is that it is easier to implement. For embedded engineers, designing and implementing serial protocols is as simple as breathing.

For this reason, Serial over BLE also provides huge advantages when the BLE stack is on a different processor than the main application. Running the BLE stack on a separate processor from the main application is a common embedded architecture strategy.

Serial over BLE can generally set up connections faster. As you can see in Figure 1, the connection setup time tends to scale linearly with the number of services, characteristics, and descriptors discovered. For each additional service, characteristic, or descriptor that needs to be discovered on connection start, you can expect to add between one and three connection intervals worth of time before the connection can be used to transfer application data.

Connection intervals are generally 30ms for iOS but can go as low as 7. A Serial over BLE architecture can be made to only use one service and two characteristics, yet transport a large variety of data.

Nearly every form of digital communication is based on a serial protocol with varying levels of encapsulation, even Bluetooth Classic. The most considerable downside of Serial over BLE is higher application latency. Increases in application latency can lead to poor user experience, and waste time that the device could spend conserving energy in a low power state.

After the request is executed, the response must be encapsulated in the proper packet. Even if the peripheral application is returning a piece of data straight from memory, it will take at least two connection intervals for the central to receive the data requested.

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Privacy Statement. Bluetooth Serial Terminal. See System Requirements. Available on PC Mobile device. Description You can use this App to communicate with Serial Bluetooth devices like the RN that are used for arduino projects and other custom projects. People also like. Microsoft Authenticator Free. Windows Insider Free. Firmware Update Check - Update assistant for legacy Win. Upgrade WP Free. QR Scanner Plus Free. As there are at least 4 popular bluetooth stacks on Windows platform than first thing you have to do is decide whicb one is installed on your PC.

Then you can use its API. They are all absolutely different. WCL and 32feet hides those differents from you and provides high level classes. Both have demo shows how to communicate with spp service. The second way is to use vCOM mechanism It is when you use Bluetooth drivers tool on your picture it is ms add device dialog to pair witb your device and connect to it. In this case a Bluetooth driver hides the connection under Virtual COM port which you can use then in your application.

And again the low-level methods depend on driver used and are very fifferent. I am not sure if 32feet provides such functional but you can do it with WCL easy. In both cases it is better to work with your device completly from your application. Because there is no easy way to find vCOM number for device installed by Bluetooth driver tool. And I should repeat: yoj do not need to "activate" service. Think about it as about tcp services ftp, smtp, http.

Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. C Activate Bluetooth serial port service Ask Question. Asked 7 years ago. Active 3 years, 9 months ago. Viewed 2k times.