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[esp32_ble_client] Start MTU negotiation earlier following ESP-IDF examples (#10062)

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This commit is contained in:
J. Nick Koston
2025-08-04 14:59:23 -10:00
committed by GitHub
parent 469246b8d8
commit 27ba90ea95
1 changed files with 12 additions and 6 deletions
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18
esphome/components/esp32_ble_client/ble_client_base.cpp
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@@ -283,7 +283,7 @@ bool BLEClientBase::gattc_event_handler(esp_gattc_cb_event_t event, esp_gatt_if_
if (!this->check_addr(param->open.remote_bda))
return false;
this->log_event_("ESP_GATTC_OPEN_EVT");
this->conn_id_ = param->open.conn_id;
// conn_id was already set in ESP_GATTC_CONNECT_EVT
this->service_count_ = 0;
if (this->state_ != espbt::ClientState::CONNECTING) {
// This should not happen but lets log it in case it does
@@ -317,11 +317,7 @@ bool BLEClientBase::gattc_event_handler(esp_gattc_cb_event_t event, esp_gatt_if_
this->conn_id_ = UNSET_CONN_ID;
break;
}
auto ret = esp_ble_gattc_send_mtu_req(this->gattc_if_, param->open.conn_id);
if (ret) {
ESP_LOGW(TAG, "[%d] [%s] esp_ble_gattc_send_mtu_req failed, status=%x", this->connection_index_,
this->address_str_.c_str(), ret);
}
// MTU negotiation already started in ESP_GATTC_CONNECT_EVT
this->set_state(espbt::ClientState::CONNECTED);
ESP_LOGI(TAG, "[%d] [%s] Connection open", this->connection_index_, this->address_str_.c_str());
if (this->connection_type_ == espbt::ConnectionType::V3_WITH_CACHE) {
@@ -338,6 +334,16 @@ bool BLEClientBase::gattc_event_handler(esp_gattc_cb_event_t event, esp_gatt_if_
if (!this->check_addr(param->connect.remote_bda))
return false;
this->log_event_("ESP_GATTC_CONNECT_EVT");
this->conn_id_ = param->connect.conn_id;
// Start MTU negotiation immediately as recommended by ESP-IDF examples
// (gatt_client, ble_throughput) which call esp_ble_gattc_send_mtu_req in
// ESP_GATTC_CONNECT_EVT instead of waiting for ESP_GATTC_OPEN_EVT.
// This saves ~3ms in the connection process.
auto ret = esp_ble_gattc_send_mtu_req(this->gattc_if_, param->connect.conn_id);
if (ret) {
ESP_LOGW(TAG, "[%d] [%s] esp_ble_gattc_send_mtu_req failed, status=%x", this->connection_index_,
this->address_str_.c_str(), ret);
}
break;
}
case ESP_GATTC_DISCONNECT_EVT: {