LAUNCHXL-CC26X2R1: Transfer 4kB File

SPEEDBIRD

Hi,

I'm having some difficulties to decided how I should solve the following problem. I would need to have two identical CC26x2 both send a 4kB large file (e.g. jpeg image) to each other, once they are connected.

During the connection of these two devices, they are each both a GATT Client & Server (due to multi_role).

What would the best way to transfer a 4kB large File (e.g. JPEG Image) from one CC26x2 to another CC26x2 (and vice versa).

Is it quicker to do it via GATT_Write, GATT_WriteLong or maybe even over GATT_Read?

How long should this whole process take about when using the PHY @ 1Mbps?

I'm currently using the SimpleLink CC13x2 26x2 3.20.0.68 BLE5 SDK (with multi_role project)

Thanks in advance!

SPEEDBIRD

over 5 years ago

0 Eirik V over 5 years ago

TI__Guru 56590 points

Hello Speedbird,

Why not use 2 Mbps PHY?

I would advise you to study both the Bluetooth 5 Throughput Demo:

https://bitbucket.itg.ti.com/projects/SA/repos/ble_examples/browse

And Study the OAD block implementation which use a combination of GATT writes with no response to write blocks and notifications to request blocks:

http://dev.ti.com/tirex/explore/content/simplelink_cc13x2_26x2_sdk_4_10_00_78/docs/ble5stack/ble_user_guide/html/ble-stack-oad/oad-profile.html#over-the-air-message-sequence

Also feel free to search this forum in case others have pondered on the same topic.

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LAUNCHXL-CC26X2R1: Transfer 4kB File