Prvni ulozeni z chegewara githubu

libraries/BluetoothSerial/examples/bt_remove_paired_devices/bt_remove_paired_devices.ino

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+//This example code is in the Public Domain (or CC0 licensed, at your option.)
+//By Victor Tchistiak - 2019
+//
+//This example demonstrates reading and removing paired devices stored on the ESP32 flash memory
+//Sometimes you may find your ESP32 device could not connect to the remote device despite
+//many successful connections earlier. This is most likely a result of client replacing your paired
+//device info with new one from other device. The BT clients store connection info for paired devices,
+//but it is limited to a few devices only. When new device pairs and number of stored devices is exceeded,
+//one of the previously paired devices would be replaced with new one.
+//The only remedy is to delete this saved bound device from your device flash memory
+//and pair with the other device again.
+//
+#include "esp_bt_main.h"
+#include "esp_bt_device.h"
+#include"esp_gap_bt_api.h"
+#include "esp_err.h"
+
+#if !defined(CONFIG_BT_SPP_ENABLED)
+#error Serial Bluetooth not available or not enabled. It is only available for the ESP32 chip.
+#endif
+
+#define REMOVE_BONDED_DEVICES 0   // <- Set to 0 to view all bonded devices addresses, set to 1 to remove
+
+#define PAIR_MAX_DEVICES 20
+uint8_t pairedDeviceBtAddr[PAIR_MAX_DEVICES][6];
+char bda_str[18];
+
+bool initBluetooth()
+{
+  if(!btStart()) {
+    Serial.println("Failed to initialize controller");
+    return false;
+  }
+ 
+  if(esp_bluedroid_init() != ESP_OK) {
+    Serial.println("Failed to initialize bluedroid");
+    return false;
+  }
+ 
+  if(esp_bluedroid_enable() != ESP_OK) {
+    Serial.println("Failed to enable bluedroid");
+    return false;
+  }
+  return true;
+}
+
+char *bda2str(const uint8_t* bda, char *str, size_t size)
+{
+  if (bda == NULL || str == NULL || size < 18) {
+    return NULL;
+  }
+  sprintf(str, "%02x:%02x:%02x:%02x:%02x:%02x",
+          bda[0], bda[1], bda[2], bda[3], bda[4], bda[5]);
+  return str;
+}
+ 
+void setup() {
+  Serial.begin(115200);
+ 
+  initBluetooth();
+  Serial.print("ESP32 bluetooth address: "); Serial.println(bda2str(esp_bt_dev_get_address(), bda_str, 18));
+  // Get the numbers of bonded/paired devices in the BT module
+  int count = esp_bt_gap_get_bond_device_num();
+  if(!count) {
+    Serial.println("No bonded device found.");
+  } else {
+    Serial.print("Bonded device count: "); Serial.println(count);
+    if(PAIR_MAX_DEVICES < count) {
+      count = PAIR_MAX_DEVICES; 
+      Serial.print("Reset bonded device count: "); Serial.println(count);
+    }
+    esp_err_t tError =  esp_bt_gap_get_bond_device_list(&count, pairedDeviceBtAddr);
+    if(ESP_OK == tError) {
+      for(int i = 0; i < count; i++) {
+        Serial.print("Found bonded device # "); Serial.print(i); Serial.print(" -> ");
+        Serial.println(bda2str(pairedDeviceBtAddr[i], bda_str, 18));     
+        if(REMOVE_BONDED_DEVICES) {
+          esp_err_t tError = esp_bt_gap_remove_bond_device(pairedDeviceBtAddr[i]);
+          if(ESP_OK == tError) {
+            Serial.print("Removed bonded device # "); 
+          } else {
+            Serial.print("Failed to remove bonded device # ");
+          }
+          Serial.println(i);
+        }
+      }        
+    }
+  }
+}
+ 
+void loop() {}