flutter_smartconfig/lib/flutter_smartconfig.dart

import 'dart:async';
import 'package:flutter/services.dart';
import 'dart:convert';
import 'dart:io' show Platform;

// Note support only Android
// for iOS https://github.com/lou-lan/SmartConfig

class FlutterSmartconfig {
  static const platform =
      const MethodChannel("plugins.flutter.io/flutter_smartconfig");

  static Future<void> stopConfigure() async {
    if (Platform.isAndroid) {
      try {
        await platform.invokeMethod('stopSmartConfig');
      } on PlatformException catch (e) {
        return Future<Map<String, String>>(() {
          throw new PlatformException(
              code: "Failed to get connected WiFi name: '${e.message}'.");
        });
      }
    } else {
      return Future<Map<String, String>>(() {
        throw new PlatformException(code: "only Android is supported");
      });
    }
  }

  static Future<dynamic> configureEsp(
      {String ssid, String bssid, String password, bool multicast, Duration timeout}) async {
    if (Platform.isAndroid) {
      try {
        // Change if required.
        const String deviceCount = "1"; //  the expect result count
        String broadcast = (multicast != null && multicast) ? "0" : "1"; // broadcast (1) or multicast (0)
        Duration _kLongTimeout = timeout ?? const Duration(seconds: 20);

        final String result =
            await platform.invokeMethod('startSmartConfig', <String, dynamic>{
          'ssid': ssid,
          'bssid': bssid,
          'pass': password,
          'deviceCount': deviceCount,
          'broadcast': broadcast,
        }).timeout(_kLongTimeout);

        final parsed = json.decode(result);
        final devices = parsed["devices"];

        return Future<dynamic>(() {
          return devices;
        });
      } on PlatformException catch (e) {
        return Future<Map<String, String>>(() {
          throw new PlatformException(
              code: "Failed to configure: '${e.message}'.");
        });
      }
    } else {
      return Future<Map<String, String>>(() {
        throw new PlatformException(code: "only Android is supported");
      });
    }
  }

// Build.VERSION.SDK_INT >= 28 needs Manifest.permission.ACCESS_COARSE_LOCATION
  static Future<Map<String, String>> getConnectedWiFiInfo() async {
    if (Platform.isAndroid) {
      try {
        String wiFiInfo = await platform.invokeMethod('getConnectedWiFiInfo');
        final parsed = json.decode(wiFiInfo);

        return Future<Map<String, String>>(() {
          return {
            "ssid": parsed["ssid"],
            "bssid": parsed["bssid"],
            "is5G": parsed["is5G"]
          };
        });
      } on PlatformException catch (e) {
        return Future<Map<String, String>>(() {
          throw new PlatformException(
              code: "Failed to get connected WiFi name: '${e.message}'.");
        });
      }
    } else {
      return Future<Map<String, String>>(() {
        throw new PlatformException(code: "only Android is supported");
      });
    }
  }
}