esp_prov_core

Pure-Dart client for Espressif Unified Provisioning (protocomm), with no Flutter dependency. It runs on all six platforms and in plain Dart programs.

It provides:

• EspSession: reads proto-ver, chooses Security 0, 1 or 2 from the firmware, runs the handshake and encrypts every request.
• Security 1 (X25519, AES-256-CTR, proof of possession) and Security 2 (SRP-6a 3072-bit SHA-512, AES-256-GCM), verified byte for byte against Espressif's esp_prov tool.
• WifiProvisioner, ThreadProvisioner, ProvCtrl, CustomEndpoint.
• ProvQrPayload for the QR JSON printed by the firmware.

You supply a ProvTransport. For Bluetooth LE use esp_prov_ble_universal, or the Flutter package esp_prov, which wires everything together.

import 'dart:typed_data';

import 'package:esp_prov_core/esp_prov_core.dart';

Future<void> run(ProvTransport transport) async {
  final session = await EspSession.open(
    transport,
    credentials: const ProvCredentials.pop('abcd1234'),
  );
  final reply = await session.custom('custom-data').send(
    Uint8List.fromList('hello'.codeUnits),
  );
  print(String.fromCharCodes(reply));
  await session.close();
}

A transport implements four members:

abstract interface class ProvTransport {
  Set<String> get endpoints;
  Future<Uint8List> send(String endpoint, Uint8List request);
  Stream<void> get onDisconnected;
  Future<void> disconnect();
}

send is one protocomm transaction (for BLE: write with response, then read the same characteristic). Implementations must serialise concurrent calls.