wireless/bluetooth/nimble: make transport ACL buffer count configurable#3638
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raiden00pl wants to merge 2 commits into
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wireless/bluetooth/nimble: make transport ACL buffer count configurable#3638raiden00pl wants to merge 2 commits into
raiden00pl wants to merge 2 commits into
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The controller<->host ACL pool was hardcoded to 10 buffers (~6 KiB with the 251-byte ACL size). Expose NIMBLE_TRANSPORT_ACL_FROM_LL_COUNT and NIMBLE_TRANSPORT_ACL_FROM_HS_COUNT (default 10) so RAM-constrained single-connection peripherals can lower it. Signed-off-by: raiden00pl <raiden00@railab.me>
cederom
previously approved these changes
Jul 14, 2026
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Thank you @raiden00pl :-)
Lets make sure CI pass :-)
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ignore ANS codespell error. ANS -> Alert Notification Service in bLE Signed-off-by: raiden00pl <raiden00@railab.me>
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Summary
The controller<->host ACL pool was hardcoded to 10 buffers (~6 KiB with the 251-byte ACL size). Expose NIMBLE_TRANSPORT_ACL_FROM_LL_COUNT and NIMBLE_TRANSPORT_ACL_FROM_HS_COUNT (default 10) so RAM- constrained single-connection peripherals can lower it.
Impact
fine tune for small systems
Testing
full demo for Thingy:52 (nrf52838 with 64KB of RAM) with single connection: