KKopyscinski commented on issue #586:
URL: https://github.com/apache/mynewt-nimble/issues/586#issuecomment-857532339


   The problem with missing frames is solved: both host and controller are 
working fine. Blestress was just configured not well enough: setting 
`BLE_ACL_BUF_SIZE: MYNEWT_VAL_BLE_L2CAP_COC_MPS+4` solves the issue - test is 
not stuck, all data is transferred properly. Basically, we need to use ACL data 
packets that are able to contain MPS and HCI data header. For default 
BLE_L2CAP_COC_MPS size (MSYS_1_BLOCK_SIZE-8 = 286) default BLE_ACL_BUF_SIZE of 
255 is just to small


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