Retrieve ESP8266 MAC Address Using Node.js

So, y’all want to get the MAC address of your ESP8266 using *, huh? Well, sit tight, ‘cause I’m here to tell ya how to do that. Now, don’t go gettin’ all fancy on me, I ain’t gonna confuse ya with no big words or technical mumbo jumbo. We’re just gonna keep it simple, like we always do around here. Alright? So, let’s get started.

Now, first things first, a MAC address is like the “name” of your device on the network. It’s a unique number, made up of six pairs of letters and numbers. You’ll usually see it written like this: 00:1A:2B:3C:4D:5E, all separated by colons. It’s important ‘cause it helps your device talk to other gadgets over the Wi-Fi or wired network.

When you’re workin’ with an ESP8266, you might be thinkin’ you need to mess around with all sorts of weird commands, but really it’s as simple as pie. The ESP8266 has a built-in function to give ya the MAC address, and you don’t gotta do much for it. It’s called . You just use it in your code and BAM! Your MAC address is right there in front of ya.

But since you’re askin’ about using *, we got a bit more work to do. See, * is runnin’ on your computer, not on the ESP8266 itself. So, to get that MAC address, we gotta communicate with the ESP8266, which is usually done over the network. It’s just like when you yell at someone across the street, and they yell back at ya. Your computer needs to talk to the ESP8266 and get the MAC address it has.

Here’s a simple rundown of how you can do it:

• Step 1: Set up your ESP8266 to connect to the Wi-Fi network.
• Step 2: In your * code, you’ll use the http module to make a request to the ESP8266 to get the MAC address.
• Step 3: Your ESP8266 will respond with its MAC address, and you can use it in your program.

Now, let me show you a basic example in *. First, make sure your ESP8266 is connected to the network, and it knows how to give you that MAC address. You’ll probably use something like this on the ESP8266:

#include 
void setup() {
*(115200);
*("yourSSID", "yourPassword");

while (*() != WL_CONNECTED) {
delay(500);
*("Connecting to WiFi...");

*("Connected to WiFi");
*(*());  // This will print the MAC address

void loop() {
// Just leave this empty for now

Now, your ESP8266 is good to go, and it’ll spit out the MAC address on the Serial Monitor. But we ain’t done yet, we gotta get that info over to your * application.

In your * program, you can use the http module to send a request to the ESP8266. Here’s a simple example of how you might do it:

const http = require('http');
const options = {
hostname: '192.168.1.100',  // IP address of your ESP8266
port: 80,                   // The port you set up for communication
path: '/mac',                // Path for the MAC address
method: 'GET'

const req = *(options, (res) => {

let data = '';
*('data', (chunk) => {
data += chunk;

*('end', () => {
*('MAC Address: ' + data);


*('error', (e) => {
*(`Problem with request: ${*}`);

Now, you see how that works? The ESP8266 will give back the MAC address when your * code asks for it. It’s as easy as pie. Just like I said, no fancy stuff here.

But there’s one thing I gotta warn ya about: You won’t be able to get a MAC address from a client (like a PC) using JavaScript directly. That’s just a security issue. It’s like if someone came knockin’ at your door, askin’ for your house key—you ain’t gonna just hand it over, right? Same deal here. So, don’t go tryin’ to get the MAC address of someone else’s computer using JavaScript, ‘cause it won’t work, and it’s not safe to do it anyhow.

So that’s all there is to it. Simple enough, right? With just a few lines of code, you can get the MAC address of your ESP8266, no trouble at all. Just remember to set it up right and make sure your devices are talkin’ to each other over the network.

Hope that helps, and happy coding! If you got any more questions, don’t be shy—just holler!

Tags：[ESP8266, MAC Address, *, WiFi, Network, Get MAC Address, JavaScript, ESP8266 * Integration]