Transferring large data over TWIS and send it via Bluetooth

RE: Transferring large data over TWIS and send it via Bluetooth

Jared — Wed, 12 May 2021 09:31:35 GMT

Hi,

[quote user="kj_sk995"]unfortunately, the bigger S140 SD is not an option for us.
The main question is for the logic implementation and maybe some other implementation suggestion, since I've got good results for the throughput with the S112 if I send notifications with the test code snippet from above.[/quote]

I understand.

[quote user=""]The module gets the first 244 bytes from the HTTP response and sends a notification to the Android app. After that, the module will get the next chunk of 244 bytes of data whenever the module receives BLE_GATTS_EVT_HVN_TX_COMPLETE event (there is a little delay of ~12ms for the host processor to query information that chunk needs to be sent, and get the next chunk with RTS signal and send it via I2C).[/quote]

I think the bottleneck in your program is here. I agree on using multiple buffers so that you can collect data while you send the other buffers over BLE would improve the throughput significantly. It's a good idea.

regards

Jared

RE: Transferring large data over TWIS and send it via Bluetooth

kj_sk995 — Tue, 11 May 2021 23:44:59 GMT

Hey Jared,

unfortunately, the bigger S140 SD is not an option for us.
The main question is for the logic implementation and maybe some other implementation suggestion, since I've got good results for the throughput with the S112 if I send notifications with the test code snippet from above.

RE: Transferring large data over TWIS and send it via Bluetooth

Jared — Tue, 11 May 2021 12:25:07 GMT

Hi,

Do you have room for the bigger S140 softdevice? It supports the Data length Extension feature that can be used for sending larger data packets.

regards

Jared