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fix ble latency

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This commit is contained in:
J. Nick Koston
2025-11-01 14:56:11 -05:00
parent f6a5a30dc2
commit ff2e2bed66
1 changed files with 5 additions and 1 deletions
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6
esphome/components/esp32_ble/ble.h
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@@ -229,6 +229,10 @@ extern ESP32BLE *global_ble;
// Inline implementations for hot-path functions
// These are called from BLE thread (notify) and main loop (drain) on every event
// Small buffer for draining notification bytes (1 byte sent per BLE event)
// Size allows draining multiple notifications per recvfrom() without wasting stack
static constexpr size_t BLE_EVENT_NOTIFY_DRAIN_BUFFER_SIZE = 16;
inline void ESP32BLE::notify_main_loop_() {
// Called from BLE thread context when events are queued
// Wakes up lwip_select() in main loop by writing to loopback socket
@@ -246,7 +250,7 @@ inline void ESP32BLE::drain_event_notifications_() {
// Requires App to be defined - include esphome/core/application.h in .cpp files that use this
extern esphome::Application App;
if (this->notify_fd_ >= 0 && App.is_socket_ready(this->notify_fd_)) {
char buffer[16];
char buffer[BLE_EVENT_NOTIFY_DRAIN_BUFFER_SIZE];
// Drain all pending notifications with non-blocking reads
// Multiple BLE events may have triggered multiple writes, so drain until EWOULDBLOCK
while (lwip_recvfrom(this->notify_fd_, buffer, sizeof(buffer), 0, nullptr, nullptr) > 0) {