[ESP32]: Add way to configure scan response.

docs/guides/esp32/README.md

@@ -17,3 +17,4 @@ example on ESP32 series of SoCs
 -   [RPC Console and Device Tracing](rpc_console.md)
 -   [Matter OTA](ota.md)
 -   [Generating and Using ESP Secure Cert Partition](secure_cert_partition.md)
+-   [BLE](ble.md)

docs/guides/esp32/ble.md

@@ -0,0 +1,27 @@
+# Bluetooth Low Energy (BLE)
+
+# Nimble: scan response
+
+The `ConfigureScanResponseData` API is used to configure the
+scan response data for advertising in a Bluetooth Low Energy (BLE) application
+based on the NimBLE BLE stack. Scan response data is additional data that a BLE
+peripheral device can include in its advertising packets to provide more
+information about itself. This API allows you to set the scan response data that
+will be included in the advertising packets.
+
+## Usage
+```
+uint8_t scanResponse[31]; // 0x05, 0x09, a, b, c, d
+
+{
+    scanResponse[0] = 0x05;
+    scanResponse[1] = 0x09;
+    scanResponse[2] = 0x61;
+    scanResponse[3] = 0x62;
+    scanResponse[4] = 0x63;
+    scanResponse[5] = 0x64;
+    chip::ByteSpan data();
+    chip::DeviceLayer::Internal::BLEMgrImpl().ConfigureScanResponseData(data);
+}
+```
+Note: ScanResponse should be configure before device starts advertisement.

src/platform/ESP32/BLEManagerImpl.h

@@ -140,7 +140,11 @@ class BLEManagerImpl final : public BLEManager,
 #endif
 #endif
 
+    void ConfigureScanResponseData(ByteSpan data);
+
 private:
+    chip::Optional<chip::ByteSpan> scanResponse;
+
     // Allow the BLEManager interface class to delegate method calls to
     // the implementation methods provided by this class.
     friend BLEManager;

src/platform/ESP32/nimble/BLEManagerImpl.cpp

@@ -1012,6 +1012,16 @@ CHIP_ERROR BLEManagerImpl::ConfigureAdvertisingData(void)
     return err;
 }
 
+void BLEManagerImpl::ConfigureScanResponseData(ByteSpan data)
+{
+    if (data.size() > MAX_ADV_DATA_LEN)
+    {
+        ChipLogError(DeviceLayer, "scan response data is out of length");
+        return;
+    }
+    scanResponse = chip::Optional(data);
+}
+
 void BLEManagerImpl::HandleRXCharWrite(struct ble_gatt_char_context * param)
 {
     CHIP_ERROR err    = CHIP_NO_ERROR;
@@ -1584,6 +1594,15 @@ CHIP_ERROR BLEManagerImpl::StartAdvertising(void)
             }
         }
 #endif
+        if (scanResponse.HasValue())
+        {
+            err = MapBLEError(ble_gap_adv_rsp_set_data(scanResponse.Value().data(), scanResponse.Value().size()));
+            if (err != CHIP_NO_ERROR)
+            {
+                ChipLogError(DeviceLayer, "ble_gap_adv_rsp_set_data failed: %s", ErrorStr(err));
+                return err;
+            }
+        }
         err = MapBLEError(ble_gap_adv_start(own_addr_type, NULL, BLE_HS_FOREVER, &adv_params, ble_svr_gap_event, NULL));
         if (err == CHIP_NO_ERROR)
         {