jtmcdole

import 'dart:typed_data';
import 'dart:convert';

main() {
  final foo = Uint8List.fromList(data);
  final checksum = Uint8List(1);
  for (int i = 8; i < foo.length; i++) {
    checksum[0] += foo[i];
  }
  print('checksum: $checksum  -> 0x${checksum[0].toRadixString(16)}');

jtmcdole

===[🌈]===
  length:    2
  codeunits: 2
  runes:     1
  utf16:     0xd83c 0xdf08
  utf8len:    4
  utf8 bytes: 0xf0 0x9f 0x8c 0x88
===[Hello🌎]===
  length:    7
  codeunits: 7

jtmcdole

// Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

import 'package:flutter/material.dart';
import 'dart:math' as math;

void main() => runApp(MyApp());

class PieChart extends CustomPainter {

jtmcdole

Boards

4Pcs ESP32 Development Board CP2102 Chip 38Pin Narrow Version

Nice to haves:

• ESP32 Terminal Breakouts for screwing in wires if you're not using a breadboard.
• Cheap breadboards
• Wires wires wires
• Solderable breadboard