What is the most efficient way to transfer data over BLE ?

RE: What is the most efficient way to transfer data over BLE ?

sriharsha kuchimanchi — Wed, 05 Mar 2014 15:15:53 GMT

Hi,

Where you able to transfer the data? I have just started and I fail to do ? any help will be much appreciated

RE: What is the most efficient way to transfer data over BLE ?

Bastiaan — Fri, 25 Oct 2013 09:16:17 GMT

Just for anyone stumbling across this, nAN-36 is now out, which should be useful to get started with custom services: https://www.nordicsemi.com/eng/content/download/34055/573345/file/nAN-36.zip

RE: What is the most efficient way to transfer data over BLE ?

Guest — Fri, 25 Oct 2013 09:16:17 GMT

Just for anyone stumbling across this, nAN-36 is now out, which should be useful to get started with custom services: https://www.nordicsemi.com/eng/content/download/34055/573345/file/nAN-36.zip

RE: What is the most efficient way to transfer data over BLE ?

Ole Morten — Tue, 25 Jun 2013 06:29:28 GMT

You can also take a look at the application that was provided in this questions, which implements a custom service: http://devzone.nordicsemi.com/index.php/nrf-uart-app

RE: What is the most efficient way to transfer data over BLE ?

Berk Soysal — Mon, 24 Jun 2013 19:26:18 GMT

Thank you very much for your reply. I am going to take a look at the battery service and try to get the usage of the services.

RE: What is the most efficient way to transfer data over BLE ?

Ole Morten — Mon, 24 Jun 2013 17:09:43 GMT

All data in BLE are transferred through what is called characteristics, contained in services. A service can either be an official service, ratified by Bluetooth SIG, like the ones listed here, or it can be a custom one that you build yourself for your own application. To transfer data over a BLE link, you therefore have to either choose an appropriate official one or build your own.

If you want to build your own, I'd recommend you to take a look on the battery service, as contained in the nRF51 SDK (ble_bas.h, ble_bas.c). This is one of the most basic services, and should be a very useful starting point. For testing and developing, using the Master Emulator firmware on the PCA10000, combined with the Master Control Panel should be useful.

For a general overview of applications built on the S110, I'd recommend you to take a look on the Introduction to the S110 document that is contained in the latest SDK's Documentation folder. When you have added a service and a characteristic with sd_ble_gatts_service_add() and sd_ble_gatts_characteristic_add(), a write to a characteristic will trigger a BLE_GATTS_EVT_WRITE, passed to your application thorough the softdevice event handling. If you need to pass data from the Peripheral to the Central, you should as Adam notes above take a look at the concept of notifications. Such packets can be send by using the sd_ble_gatts_hvx() function call.

RE: What is the most efficient way to transfer data over BLE ?

Adam — Mon, 24 Jun 2013 17:06:50 GMT

Hello,

I would recommend taking a look at BLE notifications.