nRF52832 extended advertising packet and extended data packet to send 1000kbyte data to ble uart

[Sunil vignesh]

Hi,

    I have a problem on two things

   1. I want to advertise my custom 128bit UUID with ble appearance and manufacturer data but when i did my advertising device name become shorten because or advertising packet length is up to 31 bytes . how to extended the advertising packet length 

2.  BLE UART example i can't able to send more than 27bytes . how to send more than that and how to enable ATT_MTU to send more length

I want to send the Analog sample to phone via NUS services. the array of samples be like 50KBytes sample i need to send at a stretch . is that possible to send that much data in a stretch

[Simonr]

Hi Sunil

1. I'm not sure that extended advertising packets are the way to go if you only want to advertise the full 128bit UUID along with the existing advertising packet. I would recommend adding the 128bit UUID in as part of your scan response packet instead and implement a scan response to your advertisements.

How to do this is described in this tutorial, and you can also check out I.E. ble_app_blinky example, where the scan response is used.

Best regards,

Simon

[Sunil vignesh]

Hi Simonr,

Thanks for the point 1 . i have use scan response.

What about point 2

[Simonr]

I assumed you just wanted to use the custom 128bit UUID in the BLE app UART example as well, so I would recommend using the scan response here as well. If not, please check out this novelbits blog on how to maximize throughput. You should make sure the PHY is set to the 2MBPS, ATT MTU to 247 bytes, enable DLE, and increase the connection interval if possible.

Best regards,

Simon

[Sunil vignesh]

Hi Simon,

I have check

NRF_SDH_BLE_GATT_MAX_MTU_SIZE 247

and

#define MIN_CONN_INTERVAL               MSEC_TO_UNITS(100, UNIT_1_25_MS)  
#define MAX_CONN_INTERVAL               MSEC_TO_UNITS(400, UNIT_1_25_MS)  

got debug error like

I want to send at least 200 bytes of char and

Is it possible to send 100Kbytes of samples to the ble ?

6201.ble_app_uart.zip

[Simonr]

Hi

It doesn't seem like you've set the DEBUG define in your project's preprocessor defines so you only get information prints in the debug terminal, not actual debug info. Please check out this ticket on how to debug your application.

Best regards,

Simon