More BT-related work

PUBLISHED_FROM=ab9fe8ca10e8bbaed6ec95e8acda17b90d0f8a0a

Author: Deomid Ryabkov

include/esp32/esp32_bt.h

@@ -76,6 +76,8 @@ void mgos_bt_ble_set_scan_rsp_data(const struct mg_str scan_rsp_data);
 bool mgos_bt_gap_get_adv_enable(void);
 bool mgos_bt_gap_set_adv_enable(bool adv_enable);
 
+int mgos_bt_ble_get_num_paired_devices(void);
+
 #ifdef __cplusplus
 }
 #endif

include/esp32/esp32_bt_gatts.h

@@ -34,6 +34,8 @@ bool mgos_bt_gatts_register_service(const esp_gatts_attr_db_t *svc_descr,
                                     size_t num_attrs,
                                     mgos_bt_gatts_handler_t cb);
 
+int mgos_bt_gatts_get_num_connections(void);
+
 #ifdef __cplusplus
 }
 #endif

src/esp32/esp32_bt.c

@@ -163,6 +163,10 @@ static void mgos_bt_net_ev(enum mgos_net_event ev,
   (void) arg;
 }
 
+int mgos_bt_ble_get_num_paired_devices(void) {
+  return esp_ble_get_bond_device_num();
+}
+
 bool mgos_bt_common_init(void) {
   bool ret = false;
   if (!mgos_sys_config_get_bt_enable()) {
@@ -219,7 +223,8 @@ bool mgos_bt_common_init(void) {
     mgos_net_add_event_handler(mgos_bt_net_ev, NULL);
   }
 
-  LOG(LL_INFO, ("Bluetooth init ok"));
+  LOG(LL_INFO, ("Bluetooth init ok, %d paired devices",
+                mgos_bt_ble_get_num_paired_devices()));
   ret = true;
 
 out:

src/esp32/esp32_bt_gatts.c

@@ -625,6 +625,13 @@ bool mgos_bt_gatts_register_service(const esp_gatts_attr_db_t *svc_descr,
   return true;
 }
 
+int mgos_bt_gatts_get_num_connections(void) {
+  int num = 0;
+  struct esp32_gatts_connection_entry *ce;
+  SLIST_FOREACH(ce, &s_conns, next) num++;
+  return num;
+}
+
 bool esp32_bt_gatts_init(void) {
   return (esp_ble_gatts_register_callback(esp32_bt_gatts_ev) == ESP_OK &&
           esp_ble_gatts_app_register(0) == ESP_OK);