Bluetooth classic slow transmission

[francis2]

Hi,
I'm using bluedroid classic bt spp and I noticed that whether you send 1 byte or 100bytes, it takes about 2.2ms for a full transmission to occur. My understanding is that, the program has some kind of constant transmission frequency hence it only sends in a burst like manner, and the sending payload don't really affect this "constant sending frequency".
The thing is, I need to send only 8bytes but in less than 1ms, in order to meet my specifications of sending 8bytes in a rate of 1kHz. Is it possible to force or rush the transmission in the function esp_spp_write() ?

[reofit77]

Hello,

Did you find a solution to your problem?
I am using Classic BT SPP as well, I am struggling a bit to understand how is the transmission working.
I would like to transmit a small amount of data (4 bytes) with a short deterministic delay (microsecond-ish to sub-microsecond if possible) from an esp32 ton another one.

Thanks