LAUNCHXL-CC2650: cc2650

sadasivam arumugam

Part Number: LAUNCHXL-CC2650
Other Parts Discussed in Thread: CC2650, CC2541

Hi Sir,

I am working in cc2650 package for interfacing BLE. In general, I have doubts regarding BLE concepts.

1. How to calculate the maximum amount of BLE packets transferred with respect to Connection interval and Connection Timeout. In my package, I am setting the

connection parameters as:

- Connection interval - 40 ms

- Timeout - 3200 ms

- Slave Latency - 30

How much data can be allowed to transfer over BLE.

2. And, w.k.t Connection parameters are the choice of Central device only, either it may choose our settings or it creates within their limits.

In that, if the Slave latency is not being set as per peripheral requirement, how affect, this would be?.

- Because, I always chose to have different mobiles, if the slave latency is not supported. So, I got to clear from this perspective.

3. Android versions are getting differed for different mobile manufacturers. So, BLE could cause some trouble in connectivity. How to handle this

for different android platforms.

Thanks,

over 6 years ago

0 Vetle S over 6 years ago

TI__Intellectual 1670 points

Hi Sadasivam,

I am assigning an expert to comment.

Best regards,

Vetle

0 sadasivam arumugam over 6 years ago in reply to Vetle S

Intellectual 940 points

Sure thank you sir. Vetle S

0 sadasivam arumugam over 6 years ago in reply to sadasivam arumugam

Intellectual 940 points

Sir, waiting for your reply.

0 sadasivam arumugam over 6 years ago in reply to Vetle S

Intellectual 940 points

Hi,

In addition to above comment, I haven't got the response from Expert people.

0 Elin W over 6 years ago

TI__Genius 14845 points

Hi Sadaivsam,

Apologies for the delay.

1. You can check the Bluetooth Core specification to learn more about it. There is also a section in the User's Guide that handles the connection parameters and some considerations: http://dev.ti.com/tirex/explore/content/simplelink_cc2640r2_sdk_3_30_00_20/docs/blestack/ble_user_guide/html/ble-stack-3.x/gap.html#connection-parameter-considerations

2. See the User's Guide for more information: http://dev.ti.com/tirex/explore/content/simplelink_cc2640r2_sdk_3_30_00_20/docs/blestack/ble_user_guide/html/ble-stack-3.x/gap.html#connection-parameter-update

3. I suspect that you don't have to worry too much about that, what kind of connectivity issues are you expecting to see?

Thanks,
Elin

0 sadasivam arumugam over 6 years ago in reply to Elin W

Intellectual 940 points

Hi Elin,

Thanks for valuable reply. We will look into it and reply asap.

3. I suspect that you don't have to worry too much about that, what kind of connectivity issues are you expecting to see?

- We are configuring 4 BLE devices in a single mobile. So, We expect continuous connectivity for our application. But, for now, we see lot of disconnections happen

over here and there. We cant able to find those! When we visit some other websites, they showing Connection parameters are to be configure correctly.

They pointed out, increasing timeout will give connectivity. So, we did the change and updated in above thread.

Is TI had a better BLE app, please recommend with link?

-We are using mobile- I Ball Twinkle.

Sorry for the inconvinience put on this thread. I have to change the MCU as CC2541 not with CC2650.

The disconnection happens at CC2541.

0 sadasivam arumugam over 6 years ago in reply to sadasivam arumugam

Intellectual 940 points

And also it takes time for below procedures:

1. Now, I would like to put battery test on Slave latency - 0 vs Slave Latency - 30. With same connection parameters(Timeout and interval).ie,. for power consumption checking

2. Testing with different mobile platforms.

3. Test on Keyfob CC2541 with sample code given from TI BLE stack. So, verifying if there any connection issues happening with devices.

0 Elin W over 6 years ago in reply to sadasivam arumugam

TI__Genius 14845 points

Hi Sadasivam,

You can use the Power Calculator to estimate the battery life depending of which parameters you are using. See http://www.ti.com/tool/BT-POWER-CALC

There are no TI apps for scanning BLE devices. The Securities Fundamentals lab recommends using BLE Scanner for android and LightBlue Explorer for ios.

Thanks,
Elin

0 sadasivam arumugam over 6 years ago in reply to Elin W

Intellectual 940 points

Yes, We will try and update you shortly.

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LAUNCHXL-CC2650: cc2650