Arduino & IoT Academy · 课时

为什么物联网选择 ESP32 和 ESP8266

内置 WiFi，功能更强，同时兼容 Arduino 代码

为什么物联网选择 ESP32 和 ESP8266 是 CoddyKit 上的免费 Arduino & IoT Academy 课时。这是第 1 节课，共 4 节。你可以在下方免费阅读本课时的完整内容 — 然后在浏览器中使用内置代码编辑器和全天候 AI 导师进行实践。这是 Arduino & IoT Academy 学习路径的一部分，你的进度在网页和 CoddyKit 应用中同步。 Arduino & IoT Academy 课程共包含 4 节课。

本课时的部分内容尚未翻译，以英文显示。

The Missing Piece

A plain Arduino Uno has no way to reach the internet. For real IoT, you need a board with built-in WiFi, and that is where the ESP family shines. 📡

Meet the ESP8266

The ESP8266 is a tiny, cheap chip with WiFi baked right in. It made low-cost internet projects possible for hobbyists everywhere.

Meet the ESP32

The ESP32 is its bigger sibling: faster, dual-core, and it adds Bluetooth alongside WiFi. It is the go-to board for serious IoT today.

Same Language You Know

Here is the best part: both boards run the same Arduino code style you have already learned. setup() and loop() work exactly as before.

void setup() {
  Serial.begin(115200);
}
void loop() {
}

More Power Under the Hood

An ESP32 runs at up to 240 MHz with far more memory than an Uno. That headroom lets it juggle WiFi and your sensors at once.

Watch the Voltage

One key difference: ESP pins run on 3.3V, not 5V. Feeding them 5V can fry the chip, so check every sensor's voltage first.

Faster Serial Speed

ESP boards usually open Serial at 115200 baud, not 9600. It keeps up with the chatty WiFi boot messages they print at startup.

Serial.begin(115200);

Lots of Pins, Some Special

The ESP32 offers many GPIO pins, but a few are reserved or input-only. You learn which ones are safe as you build.

The WiFi Library

To go online you include the built-in WiFi library. One header line unlocks connecting, scanning, and serving web pages.

#include <WiFi.h>

Cheap Enough to Deploy

These boards cost just a few dollars, so you can scatter many around a home or farm. Low price is a huge reason the ESP dominates IoT.

Which One to Pick

Need only WiFi on a tight budget? The ESP8266 is fine. Want Bluetooth, more pins, and speed? Reach for the ESP32.

Quick Check

You want a board for IoT that also speaks Bluetooth. Which fits best?

Recap

You met the WiFi-ready ESP boards, saw they run familiar Arduino code on 3.3V, and learned the ESP32 adds Bluetooth and power. 🎉

常见问题解答

「为什么物联网选择 ESP32 和 ESP8266」课时是免费的吗？

是的 — 「为什么物联网选择 ESP32 和 ESP8266」的完整文本可在网页上免费阅读。要进行交互式练习（内置代码编辑器和全天候 AI 导师）并解锁 Arduino & IoT Academy 课程的其余内容，请升级到 CoddyKit PRO。 Arduino & IoT Academy 课程共包含 4 节课。

「为什么物联网选择 ESP32 和 ESP8266」这节课中我会学到什么？

内置 WiFi，功能更强，同时兼容 Arduino 代码你通过在浏览器中直接运行的动手代码来练习 Arduino & IoT Academy，全天候 AI 导师会在你学习这节课的过程中回答你的问题。

学习 Arduino & IoT Academy 需要有经验吗？

无需任何先前经验。CoddyKit 上的 Arduino & IoT Academy 课程适合初学者到高级学习者，你可以从这里开始或从头开始，按照自己的节奏学习。这是第 1 节课，共 4 节。

「为什么物联网选择 ESP32 和 ESP8266」课时需要多长时间？

大多数 CoddyKit 课程大约需要 5–10 分钟。每节课都很精短且互动，所以你能稳步进步，并在网页和应用中从离开的地方继续。

我能在这节 Arduino & IoT Academy 课中编写并运行代码吗？

能。每节 Arduino & IoT Academy 课都包含内置代码编辑器，你可以在浏览器中直接编写并运行真实代码，并获得即时 AI 反馈 — 无需本地设置。

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