We do not have any examples similar to SPP implemented on CYBT-343026-1 BLE .
However you can use Custom service of BLE and can send data by notifications property upon receiving UART input.
Thanks for your information. Could I ask what kind of throughput it can achieve in this Custom service over BLE?
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I am sorry, I don't have the exact numbers to give now. However I remember in some cases I have seen 50 - 130kbps in some previous CYW20706 tests.
Please note throughput may vary depending upon the connection parameters (Connection interval) , MTU size etc.