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Code Issues Releases Wiki Activity

Merge branch 'connection_params' into integration

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This commit is contained in:
J. Nick Koston
2025-08-21 20:27:15 -05:00
parent 8f44ec0b51 9d16eeeb77
commit f83f05b704
2 changed files with 36 additions and 6 deletions
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39
esphome/components/esp32_ble_client/ble_client_base.cpp
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@@ -12,6 +12,12 @@ namespace esphome::esp32_ble_client {
static const char *const TAG = "esp32_ble_client";
// Default connection parameters matching ESP-IDF's BTM_BLE_CONN_INT_*_DEF
// These are conservative values that work well with most devices
static const uint16_t DEFAULT_MIN_CONN_INTERVAL = 0x0A; // 10 * 1.25ms = 12.5ms
static const uint16_t DEFAULT_MAX_CONN_INTERVAL = 0x0C; // 12 * 1.25ms = 15ms
static const uint16_t DEFAULT_CONN_TIMEOUT = 600; // 600 * 10ms = 6s
// Intermediate connection parameters for standard operation
// ESP-IDF defaults (12.5-15ms) are too slow for stable connections through WiFi-based BLE proxies,
// causing disconnections. These medium parameters balance responsiveness with bandwidth usage.
@@ -111,8 +117,12 @@ void BLEClientBase::connect() {
this->remote_addr_type_);
this->paired_ = false;
// Open the connection without setting connection parameters
// Parameters will be set after connection is established if needed
// Set default connection parameters before connecting
// This ensures we use conservative parameters that work well with weak signal devices
// rather than potentially aggressive parameters from a previous connection
this->set_default_conn_params_();
// Open the connection with default parameters
auto ret = esp_ble_gattc_open(this->gattc_if_, this->remote_bda_, this->remote_addr_type_, true);
if (ret) {
this->log_gattc_warning_("esp_ble_gattc_open", ret);
@@ -215,8 +225,8 @@ void BLEClientBase::log_warning_(const char *message) {
ESP_LOGW(TAG, "[%d] [%s] %s", this->connection_index_, this->address_str_.c_str(), message);
}
void BLEClientBase::set_conn_params_(uint16_t min_interval, uint16_t max_interval, uint16_t latency, uint16_t timeout,
const char *param_type) {
void BLEClientBase::update_conn_params_(uint16_t min_interval, uint16_t max_interval, uint16_t latency,
uint16_t timeout, const char *param_type) {
esp_ble_conn_update_params_t conn_params = {{0}};
memcpy(conn_params.bda, this->remote_bda_, sizeof(esp_bd_addr_t));
conn_params.min_int = min_interval;
@@ -230,16 +240,33 @@ void BLEClientBase::set_conn_params_(uint16_t min_interval, uint16_t max_interva
}
}
void BLEClientBase::set_conn_params_(uint16_t min_interval, uint16_t max_interval, uint16_t latency, uint16_t timeout,
const char *param_type) {
// Set preferred connection parameters before connecting
// These will be used when establishing the connection
this->log_connection_params_(param_type);
esp_err_t err = esp_ble_gap_set_prefer_conn_params(this->remote_bda_, min_interval, max_interval, latency, timeout);
if (err != ESP_OK) {
this->log_gattc_warning_("esp_ble_gap_set_prefer_conn_params", err);
}
}
void BLEClientBase::set_fast_conn_params_() {
// Switch to fast connection parameters for service discovery
// This improves discovery speed for devices with short timeouts
this->set_conn_params_(FAST_MIN_CONN_INTERVAL, FAST_MAX_CONN_INTERVAL, 0, FAST_CONN_TIMEOUT, "fast");
this->update_conn_params_(FAST_MIN_CONN_INTERVAL, FAST_MAX_CONN_INTERVAL, 0, FAST_CONN_TIMEOUT, "fast");
}
void BLEClientBase::set_medium_conn_params_() {
// Set medium connection parameters for balanced performance
// This balances performance with bandwidth usage for normal operation
this->set_conn_params_(MEDIUM_MIN_CONN_INTERVAL, MEDIUM_MAX_CONN_INTERVAL, 0, MEDIUM_CONN_TIMEOUT, "medium");
this->update_conn_params_(MEDIUM_MIN_CONN_INTERVAL, MEDIUM_MAX_CONN_INTERVAL, 0, MEDIUM_CONN_TIMEOUT, "medium");
}
void BLEClientBase::set_default_conn_params_() {
// Set default connection parameters before connecting
// These conservative values work well with most devices including weak signal ones
this->set_conn_params_(DEFAULT_MIN_CONN_INTERVAL, DEFAULT_MAX_CONN_INTERVAL, 0, DEFAULT_CONN_TIMEOUT, "default");
}
bool BLEClientBase::gattc_event_handler(esp_gattc_cb_event_t event, esp_gatt_if_t esp_gattc_if,

3
esphome/components/esp32_ble_client/ble_client_base.h
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@@ -133,10 +133,13 @@ class BLEClientBase : public espbt::ESPBTClient, public Component {
void log_event_(const char *name);
void log_gattc_event_(const char *name);
void update_conn_params_(uint16_t min_interval, uint16_t max_interval, uint16_t latency, uint16_t timeout,
const char *param_type);
void set_conn_params_(uint16_t min_interval, uint16_t max_interval, uint16_t latency, uint16_t timeout,
const char *param_type);
void set_fast_conn_params_();
void set_medium_conn_params_();
void set_default_conn_params_();
void log_gattc_warning_(const char *operation, esp_gatt_status_t status);
void log_gattc_warning_(const char *operation, esp_err_t err);
void log_connection_params_(const char *param_type);