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tweak

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This commit is contained in:
J. Nick Koston
2025-07-31 07:45:03 -10:00
parent 255cf4b661
commit d6776804ae
1 changed files with 13 additions and 8 deletions
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21
esphome/components/bluetooth_proxy/bluetooth_connection.cpp
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@@ -43,15 +43,15 @@ static constexpr uint8_t SERVICE_OVERHEAD_EFFICIENT = 10; // UUID(6) + handle(4
static constexpr uint8_t CHAR_SIZE_128BIT = 35; // UUID(20) + handle(4) + props(4) + overhead(7)
static constexpr uint8_t DESC_SIZE_128BIT = 25; // UUID(20) + handle(4) + overhead(1)
static constexpr uint8_t DESC_SIZE_16BIT = 10; // UUID(6) + handle(4)
static constexpr uint8_t DESC_PER_CHAR = 2; // Assume 2 descriptors per characteristic
static constexpr uint8_t DESC_PER_CHAR = 1; // Assume 1 descriptor per characteristic
// Helper to estimate service size before fetching all data
static size_t estimate_service_size(uint16_t char_count, bool use_efficient_uuids) {
size_t service_overhead = use_efficient_uuids ? SERVICE_OVERHEAD_EFFICIENT : SERVICE_OVERHEAD_LEGACY;
// Always assume 128-bit UUIDs for characteristics to be safe
size_t char_size = CHAR_SIZE_128BIT;
// Assume mix of descriptor types: one 128-bit + one 16-bit per characteristic
size_t desc_size = (DESC_SIZE_128BIT + DESC_SIZE_16BIT) * DESC_PER_CHAR;
// Assume one 128-bit descriptor per characteristic
size_t desc_size = DESC_SIZE_128BIT * DESC_PER_CHAR;
return service_overhead + (char_size + desc_size) * char_count;
}
@@ -129,7 +129,8 @@ void BluetoothConnection::send_service_for_discovery_() {
resp.address = this->address_;
// Dynamic batching based on actual size
static constexpr size_t MAX_PACKET_SIZE = 1390; // MTU limit for API messages
static constexpr size_t MAX_PACKET_SIZE =
1360; // Conservative MTU limit for API messages (accounts for WPA3 overhead)
// Keep running total of actual message size
size_t current_size = 0;
@@ -167,8 +168,8 @@ void BluetoothConnection::send_service_for_discovery_() {
}
// If this service likely won't fit, send current batch (unless it's the first)
if (!resp.services.empty() &&
(current_size + estimate_service_size(total_char_count, use_efficient_uuids) > MAX_PACKET_SIZE)) {
size_t estimated_size = estimate_service_size(total_char_count, use_efficient_uuids);
if (!resp.services.empty() && (current_size + estimated_size > MAX_PACKET_SIZE)) {
// This service likely won't fit, send current batch
break;
}
@@ -291,8 +292,12 @@ void BluetoothConnection::send_service_for_discovery_() {
// Now we know we're keeping this service, add its size
current_size += service_size;
ESP_LOGV(TAG, "[%d] [%s] Service %d size: %d, total size now: %d", this->connection_index_,
this->address_str().c_str(), this->send_service_, service_size, current_size);
// Log the difference between estimate and actual size
int size_diff = (int) service_size - (int) estimated_size;
ESP_LOGD(TAG, "[%d] [%s] Service %d actual: %d, estimated: %d, diff: %+d", this->connection_index_,
this->address_str().c_str(), this->send_service_, service_size, estimated_size, size_diff);
ESP_LOGV(TAG, "[%d] [%s] Total size now: %d", this->connection_index_, this->address_str().c_str(), current_size);
// Successfully added this service, increment counter
this->send_service_++;