,

ESP32 Static IP: 7 Powerful Ways to Easily Set a Stable IP Address

0b63979cd9494aa401d1fce2d73bb002
By Raj Kumar
On: November 22, 2025
ESP32 Static IP

Table of Contents

Learn how to set ESP32 static IP easily with step-by-step tutorials. Fix ESP32 static IP issues, set WiFi and Ethernet IP, and master ESP32 networking.

If you’re working with the ESP32 for home automation, IoT dashboards, security cameras, or any smart system, at some point you will face one annoying problem: the ESP32 keeps changing its IP address. One day your ESP32 is working fine, and the next day Home Assistant cannot reach it. Your mobile app cannot connect. Your web server breaks. Your automation fails silently.

This happens because, by default, the ESP32 uses DHCP, where your router dynamically assigns an IP address. That means the IP might change anytime the device reboots, reconnects, or the router resets.

The solution is simple: set a static IP.

In this tutorial, you’ll learn everything about configuring an ESP32 static IP, regardless of the platform you use. Whether you’re working with the Arduino IDE, ESP-IDF, MicroPython, ESPHome, or Home Assistant, I will walk you through it step by step.

We’ll also cover esp32 static ip not working issues, Ethernet static IP, AP mode fixed IP, and real examples such as esp32 cam static ip address.

What Is a Static IP on ESP32?

A static IP is a permanent IP address that you manually assign to the ESP32. This ensures that your device always uses the same IP every time it connects to your WiFi or Ethernet network.

Why does this matter?

Because many projects depend on stable communication:

  • Home Assistant dashboards
  • Local web servers
  • ESP32 security camera streaming
  • MQTT brokers
  • REST API endpoints
  • ESP32 remote sensors
  • IoT automations

If the IP changes, you lose connection. Not fun.

That’s why setting an esp32 static fixed IP address is almost a must for any serious project. And if you are also exploring WiFi-related setups, you can check this helpful guide on ESP32 WiFi scanning here: ESP32 WiFi Scan Tutorials
It fits perfectly with learning how your ESP32 behaves on the network before assigning a stable IP.

Where You Should Use a Static IP Address

Here are the most common real-world cases:

1. Home Assistant ESP32 Static IP

If you add your ESP32 to Home Assistant and its IP changes, HA will show it as offline. So you must use a home assistant esp32 static ip setup to keep your sensors and ESPHome devices stable.

2. ESPHome ESP32 Static IP

ESPHome YAML configurations often use manual_ip: to ensure the device stays reachable.

3. ESP32 WiFi Server

If you host:

  • Web server
  • REST API
  • Camera feed
  • Control dashboard

Then you must use esp32 server static ip or clients will lose access.

4. ESP32 Websocket Server

Websocket connections break if the IP changes.

5. ESP32 MQTT

MQTT brokers rely on stable client addresses.

6. ESP32 Ethernet Projects

If you use LAN8720 or W5500, setting esp32 ethernet static ip example is required for stability.

Choosing the Right IP for Your ESP32

Before jumping into code, you need to pick the correct IP address.

Rule of thumb: choose an IP outside the DHCP range.

Example:

  • Router DHCP range: 192.168.1.100 – 192.168.1.200
  • Good static IP choices:
    • 192.168.1.50
    • 192.168.1.60
    • 192.168.1.90

Subnet mask:
255.255.255.0

Gateway:
Your router IP (usually 192.168.1.1 or 192.168.0.1).

DNS:
Prefer Google DNS: 8.8.8.8 (optional but reliable)

ESP32 Static IP Using Arduino

Let’s start with the most common environment: Arduino IDE.

Here is the simplest arduino esp32 set static ip code:

#include 

const char* ssid = "YourWiFi";
const char* password = "YourPassword";

// Static IP configuration
IPAddress local_IP(192.168.1.60);
IPAddress gateway(192.168.1.1);
IPAddress subnet(255.255.255.0);
IPAddress dns(8.8.8.8);

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

  if (!WiFi.config(local_IP, gateway, subnet, dns)) {
    Serial.println("Static IP failed");
  }

  WiFi.begin(ssid, password);

  Serial.print("Connecting");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println();
  Serial.println("Connected!");
  Serial.print("IP Address: ");
  Serial.println(WiFi.localIP());
}

void loop() {

}

This covers:

  • esp32 static ip address
  • esp32 wifi static ip address
  • esp32 set static ip address
  • esp32 wifi begin static ip

Once uploaded, your ESP32 will always get 192.168.1.60.

ESP32 Static IP Not Working? Fix It

The most common reason esp32 static ip not working happens is incorrect configuration.

Here are the real causes beginners face:

1. IP Already in Use

Use:
arp -a
to check connected devices.

2. Wrong Gateway

If your router uses 192.168.0.1, you must match it.

3. Router Blocking Manual IP

Some routers force devices to use DHCP.

Fix:
Enable Static Lease / IP Reservation in router settings.

4. Wrong Subnet Mask

Should be:
255.255.255.0 for most home networks.

5. WiFi.config() Called After WiFi.begin()

Static IP won’t apply.

ESP32 AP Mode Static IP

If your ESP32 is working as a hotspot (Access Point), you can use esp32 ap mode static ip.

WiFi.softAPConfig(
  IPAddress(192.168.4.1),
  IPAddress(192.168.4.1),
  IPAddress(255.255.255.0)
);
WiFi.softAP("ESP32_AP", "12345678");

The default AP IP is 192.168.4.1, but you can change it.

ESP32 CAM Static IP Address

ESP32-CAM becomes more stable with a static IP because the camera stream breaks if DHCP changes the IP.

WiFi.config(local_IP, gateway, subnet, dns);
WiFi.begin(ssid, password);

Most people use:
192.168.1.200 or 192.168.1.210

ESP32 Static IP with ESPHome + Home Assistant

For Home Assistant users, ESPHome is common.

Here is esp32 static ip yaml:

wifi:
  ssid: "MyWiFi"
  password: "MyPassword"

  manual_ip:
    static_ip: 192.168.1.90
    gateway: 192.168.1.1
    subnet: 255.255.255.0
    dns1: 8.8.8.8

This covers:

  • esphome esp32 static ip
  • home assistant esp32 static ip

ESP32 Static IP Using MicroPython

If you’re coding in MicroPython, here’s a simple esp32 micropython static ip example:

import network

station = network.WLAN(network.STA_IF)
station.active(True)

station.ifconfig((
  '192.168.1.80',  # static IP 
  '255.255.255.0',  # subnet
  '192.168.1.1',  # gateway
  '8.8.8.8'       # DNS
))

station.connect("MyWiFi", "MyPassword")

print(station.ifconfig())

MicroPython makes IP setting straightforward.

ESP32 Static IP in ESP-IDF

ESP-IDF gives full control. This is the esp32 static ip idf approach:

Key steps:

  1. Stop DHCP client
  2. Set IP info
  3. Start WiFi

Snippet:

tcpip_adapter_dhcpc_stop(TCPIP_ADAPTER_IF_STA);

tcpip_adapter_ip_info_t ipInfo;
IP4_ADDR(&ipInfo.ip, 192,168,1,70);
IP4_ADDR(&ipInfo.gw, 192,168,1,1);
IP4_ADDR(&ipInfo.netmask, 255,255,255,0);

tcpip_adapter_set_ip_info(TCPIP_ADAPTER_IF_STA, &ipInfo);

This is for WiFi. Ethernet uses similar logic.

ESP32 Ethernet Static IP Example (LAN8720 / W5500)

If you’re using Ethernet instead of WiFi, here’s an esp32 ethernet static ip example in Arduino:

ETH.begin(1);
ETH.config(
  IPAddress(192.168.1.55),
  IPAddress(192.168.1.1),
  IPAddress(255.255.255.0),
  IPAddress(8.8.8.8)
);

Same concept, just using Ethernet instead of WiFi.

ESP32 Get IP Addres

At any time, you can check your current IP:

Serial.println(WiFi.localIP());

This is handy when testing DHCP vs static IP.

Assign Static IP to ESP32 via Router

Some people prefer setting a MAC-based static lease in their router instead of writing code.

This is called:

  • dhcp reservation
  • ip lease
  • assign static ip to esp32

Steps:

  1. Log in to router
  2. Find ESP32 MAC address
  3. Reserve an IP

Why Static IP Matters for Real Projects

If you’ve ever built a project like:

  • Smart home sensor
  • ESP32 cam streaming live feed
  • Home security dashboard
  • MQTT-based automation
  • ESP32 web server or API
  • Home Assistant integration

Then you already know that IP changes are your biggest enemy.

Imagine hosting an ESP32 server at /temperature that your automation reads every minute. If the IP changes from 192.168.1.150 to 192.168.1.181, everything breaks—Home Assistant shows errors, your app becomes unreachable, and debugging becomes a headache.

That’s why using a esp32 set static ip address or assigning static IP via your router is almost a requirement for any real world IoT deployment.

DHCP vs Static IP – The Real Difference

Let’s break it down in simple terms.

DHCP (Dynamic Host Configuration Protocol)

  • Router assigns IP automatically
  • IP can change anytime
  • ESP32 doesn’t control its address
  • Great for casual use
  • Bad for servers and automation

Static IP (Manual IP)

  • You choose a fixed IP
  • ESP32 uses it forever
  • Perfect for servers, APIs, HA, dashboards
  • Zero breakage in automation
  • More reliable

So, if you want long-term stability, static IP is the way.

Two Ways to Use Static IP on ESP32

A lot of beginners get confused here. There are only two reliable methods:

1. Set static IP inside ESP32 code

Examples:

  • Arduino
  • MicroPython
  • ESP-IDF
  • ESPHome YAML

This is what you did earlier.

2. Assign static IP from Router (Static Lease)

This is sometimes better.

You map ESP32’s MAC address → fixed IP.

Advantages:

  • IP never changes
  • No need to modify code
  • Works with firmware updates
  • Router handles all IP logic

Search your router admin page for:

  • “Static IP assignment”
  • “Address reservation”
  • “DHCP reservation”
  • “Bind IP + MAC”

Both methods work. You can choose whichever fits your setup.

Deep Dive: ESP32 in Server Mode with Static IP

When ESP32 acts as a server, you absolutely must use a static IP.

Why?

Because clients rely on the address. A web browser, mobile app, or Home Assistant all connect to the same endpoint.

Example request:
http://192.168.1.90/data

If the IP changes, the entire system breaks.

This is why you should always configure esp32 server static ip whenever you serve:

  • HTML pages
  • JSON data
  • REST API endpoints
  • WebSockets
  • Live video streams

A stable IP makes everything predictable.

ESP32 Static IP with Web Server Example (Arduino)

Here’s a friendly and clean example for a web server using static IP:

#include 
#include 

const char* ssid = "MyWiFi";
const char* password = "MyPassword";

IPAddress local_IP(192.168.1.60);
IPAddress gateway(192.168.1.1);
IPAddress subnet(255.255.255.0);

WebServer server(80);

void handleRoot() {
  server.send(200, "text/plain", "Hello from ESP32");
}

void setup() {
  Serial.begin(115200);
  WiFi.config(local_IP, gateway, subnet);
  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
  }

  server.on("/", handleRoot);
  server.begin();
}

void loop() {
  server.handleClient();
}

This ensures your server always lives at 192.168.1.60.

ESP32 Static IP Ethernet Setup (Deep Explanation)

Earlier we saw a quick esp32 ethernet static ip example. Now let’s go deeper.

You may use:

  • LAN8720 Ethernet PHY
  • W5500 SPI Ethernet module
  • Built-in ESP32-Ethernet (in ESP32-S3, ESP32-S2, some modules)

Ethernet is far more stable than WiFi for industrial IoT.

The logic is:

  1. Initialize Ethernet
  2. Disable DHCP
  3. Set static IP
  4. Start Ethernet

Full example:

#include 

static bool eth_connected = false;

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

  ETH.begin(
    1,       // Address
    0,       // Power pin
    23,      // MDC pin
    18       // MDIO pin
  );

  ETH.config(
    IPAddress(192.168.1.55),
    IPAddress(192.168.1.1),
    IPAddress(255.255.255.0),
    IPAddress(8.8.8.8)
  );
}

void loop() {
  if (ETH.linkUp()) {
    if (!eth_connected) {
      Serial.println("Ethernet Connected");
      eth_connected = true;
    }
  }
}

This example ensures Ethernet always stays at a known IP.

ESP32 Fix IP Address Using Router Only

Many professional developers actually prefer handling static IP at the router level.

Why?

  • Cleaner firmware
  • Less risk of conflicts
  • Works across reboots
  • Easier maintenance

You usually find this in router UI under “LAN Settings”.

Here’s the required information:

ESP32 MAC Address

You can print it in Arduino:

Serial.println(WiFi.macAddress());

Then assign an IP like 192.168.1.77 to that MAC.

This is known as:

  • assign static ip to esp32
  • reserved IP lease
  • static DHCP

This method also helps when your esp32 static ip not working in code.

ESP32 Static IP in ESP-IDF (Advanced Users)

The ESP-IDF method gives you full control.

Newer IDF versions use:

esp_netif_dhcpc_stop(netif);
esp_netif_set_ip_info(netif, &ipInfo);

The older method uses:

tcpip_adapter_dhcpc_stop()

You also need to use:

esp_netif_create_default_wifi_sta();
esp_wifi_connect();

A complete ESP-IDF static IP setup includes:

  • Creating network interface
  • Stopping DHCP
  • Configuring IP
  • Applying DNS
  • Connecting

It feels a bit heavy for beginners, but it’s the most reliable method in professional systems.

Why ESP32 Static IP Sometimes Fails

Let’s break down real reasons behind esp32 static ip not working. Most people blame the code, but the issue is usually the network.

Here’s the complete truth.

Reason 1: IP Already Taken

Two devices cannot share the same IP. This is the most common beginner mistake.

Check devices on your network using:

  • Router admin
  • arp -a command
  • Network scanner apps

Reason 2: Wrong Gateway

If router is 192.168.0.1, but you enter 192.168.1.1, nothing will work.

Gateways must match your network.

Reason 3: Wrong Subnet Mask

Most networks use:
255.255.255.0

But some fiber routers use:
255.255.254.0

Mismatch = no connection.

Reason 4: WiFi.config() Used After WiFi.begin()

Order matters.

Wrong order:

WiFi.begin();
WiFi.config();

Correct order:

WiFi.config();
WiFi.begin();

Reason 5: Router Blocking Manual IP

Some routers require IP reservations for manual IPs.
Simple fix: add ESP32 MAC in Router → DHCP Reservation.

Reason 6: DNS Missing

If DNS is not set, internet requests fail.

Fix:

WiFi.config(localIP, gateway, subnet, dns);

Use Google DNS: 8.8.8.8.

Reason 7: Using IP Outside Network Range

Example mistake:
Router is 192.168.0.x but you assign 192.168.1.50.

Different network = no chance of connecting.

ESP32 AP Mode Static IP (More Details)

The AP mode (Access Point mode) turns your ESP32 into a hotspot.

Default AP IP is:
192.168.4.1

You can update it like this:

WiFi.softAPConfig(
  IPAddress(192.168.10.1),
  IPAddress(192.168.10.1),
  IPAddress(255.255.255.0)
);
WiFi.softAP("ESP32_AP", "12345678");

Why use AP mode static IP?

  • Offline control system
  • Robot control
  • Local WiFi mesh
  • Direct ESP32 device access without router

It guarantees predictable access.

ESP32 CAM Static IP: Stability Boost

The esp32 cam static ip address setup makes your camera:

  • load faster
  • stream reliably
  • reconnect without losing IP
  • work perfectly with Home Assistant

A recommended IP range for cameras:
192.168.1.200–220

Camera streams can be sensitive. If the IP changes, your RTSP or HTTP stream breaks instantly, so using a fixed IP is a common practice.

ESPHome ESP32 Static IP: More Examples

Here’s an advanced esp32 static ip yaml configuration:

wifi:
  ssid: "HomeWiFi"
  password: "Password123"

  manual_ip:
    static_ip: 192.168.1.91
    gateway: 192.168.1.1
    subnet: 255.255.255.0
    dns1: 8.8.8.8
    dns2: 1.1.1.1

api:
ota:
logger:

Why ESPHome + static IP is powerful:

  • Works perfectly with Home Assistant
  • ESPHome devices reboot often
  • DHCP can break sensors
  • YAML is simple and human-readable
  • You control everything

This solves home assistant esp32 static ip issues permanently.

ESP32 Get IP Address, Gateway, and More

You can print full IP info:

Serial.println(WiFi.localIP());
Serial.println(WiFi.gatewayIP());
Serial.println(WiFi.subnetMask());

Useful while testing static vs dynamic IP.

Full Troubleshooting Guide for ESP32 Static IP

Even experienced developers face issues with static IP. Networks vary, routers behave differently, and DHCP servers sometimes interfere. So let’s look at real-world problems and solutions.

Problem 1: ESP32 won’t connect when static IP is used

Possible causes:

  • Wrong gateway
  • Wrong subnet
  • IP conflict
  • DHCP still active
  • Wrong order of WiFi calls

Fix

Double-check:

WiFi.config(localIP, gateway, subnet);
WiFi.begin(ssid, password);

If you reverse the order, it fails.

Problem 2: ESP32 Static IP Not Working After Reboot

This is very common.

Reason:
Your router forces DHCP for unknown devices.

Fix

Add ESP32 MAC address to your router’s DHCP reservation.

Search your router page for:

  • Reserved IP
  • DHCP static lease
  • Bind IP to MAC

This is the best long-term method to assign static ip to esp32.

Problem 3: ESP32 connects but has no internet

This happens when:

  • DNS not set
  • Gateway wrong
  • Router blocks manual DNS

Fix

WiFi.config(localIP, gateway, subnet, dns1, dns2);

Use Google DNS:
8.8.8.8
1.1.1.1

Problem 4: ESP32 Ethernet Static IP Not Working

Reasons:

  • PHY not initialized
  • Wrong wiring (MDIO/MDC)
  • Static IP outside LAN
  • DHCP not disabled

Fix

Use this flow:

ETH.begin();
ETH.config(ip, gateway, subnet, dns);

Check link status:

if (ETH.linkUp()) {
    Serial.println("Ethernet Connected");
}

Problem 5: ESP32 AP Mode Static IP Not Responding

When using esp32 ap mode static ip, clients must use the same network range.

Example:
If AP IP is 192.168.10.1, your phone might automatically use:

192.168.10.x

If not, AP will not respond.

Fix

Use this:

WiFi.softAPConfig(AP_ip, AP_gateway, AP_subnet);

Problem 6: ESP32 Camera Freezes Without Static IP

The ESP32-CAM is sensitive. When IP changes, the stream drops.

Fix

Use a high-range stable IP like:

192.168.1.210

And configure static IP in router.

Best Practices for ESP32 Static IP

If you want your IoT system to run for years without touching it, follow these golden rules.

1. Use Router Assigned Static IP (Recommended)

When possible, always reserve IP from router.

Advantages:

  • No code changes
  • Works even after firmware update
  • Prevents IP conflicts
  • Plays well with Home Assistant

Search for:
“DHCP Reservation” OR “Static Lease”.

This solves nearly all esp32 static ip not working problems.

2. Choose IPs Above DHCP Range

Most routers assign IPs between:

192.168.1.2 — 192.168.1.150

So use something like:

192.168.1.180
192.168.1.200
192.168.1.240

This avoids conflicts.

3. Use DNS from Google or Cloudflare

This ensures stable internet.

Good choices:

  • Google DNS: 8.8.8.8
  • Cloudflare DNS: 1.1.1.1

4. Keep IP Settings the Same Across All ESP32 Boards

If you deploy multiple ESP32 devices:

  • Keep subnet same
  • Keep gateway same
  • Only change last octet of IP

Example:

192.168.1.91  
192.168.1.92  
192.168.1.93

5. Print IP and Network Info During Boot

Add:

Serial.println(WiFi.localIP());
Serial.println(WiFi.gatewayIP());
Serial.println(WiFi.subnetMask());

This makes debugging easy.

6. For Home Assistant Users: Always Prefer Static IP

If you integrate ESP32 with Home Assistant:

  • ESPHome
  • MQTT
  • HTTP sensors
  • ESP32 camera

Then static IP is absolutely necessary.

This solves issues with home assistant esp32 static ip always losing connection.

7. Document Your IP Plan

Keep a small note:

Sensor 1: 192.168.1.90  
Sensor 2: 192.168.1.91  
Camera 1: 192.168.1.200

You’ll thank yourself later.

Additional Examples

Let’s cover a few scenarios beginners often ask about.

ESP32 Static IP with mDNS Enabled

You can use both static IP + mDNS.

#include 
MDNS.begin("esp32device");

Then you can use:

http://esp32device.local

This helps when IP changes accidentally.

ESP32 WiFi Begin Static IP Example

Some boards behave better using:

WiFi.begin(ssid, password, channel, bssid);

If your router has bssid-locking, this improves stability.

ESP32 Micropython Static IP Example (Simplified)

import network

sta = network.WLAN(network.STA_IF)
sta.active(True)
sta.ifconfig((
    '192.168.1.52',
    '255.255.255.0',
    '192.168.1.1',
    '8.8.8.8'
))
sta.connect("WiFi", "Password")

ESP32 Server Static IP Example (Advanced)

If you’re hosting multiple endpoints:

server.on("/json", handleJSON);
server.on("/status", getStatus);
server.on("/sensor", getSensorData);

This setup requires a fixed IP so clients can always find the server.

FAQ : ESP32 Static IP

1. How to set static IP for ESP32?

Use:

WiFi.config(localIP, gateway, subnet);

Then call:

WiFi.begin(ssid, password);

This sets an esp32 static ip address manually.

2. Why is my esp32 static ip not working?

Common reasons:

  • IP conflict
  • Wrong gateway
  • Wrong subnet
  • DNS missing
  • Wrong order of WiFi calls

Fixing these resolves 99% of issues.

3. How do I assign static IP to ESP32 from router?

Go to router → DHCP Reservation → Add ESP32 MAC address → Assign IP.

This is the safest way to assign static ip to esp32.

4. How do I set esp32 wifi static ip address?

Use:

WiFi.config(localIP, gateway, subnet, dns);

You can also use router-based static IP.

5. Does ENC28J60 or LAN8720 support esp32 ethernet static ip example?

Yes. After initializing Ethernet, use:

ETH.config(ip, gateway, subnet);

Works for both modules.

6. Can ESP32 CAM use static IP?

Yes. Setting esp32 cam static ip address improves video stability and prevents stream drops.

7. What is esp32 ap mode static ip?

In AP mode, ESP32 becomes WiFi hotspot. You can change default 192.168.4.1 to your own:

WiFi.softAPConfig(AP_ip, AP_gw, AP_subnet);

8. Can ESP32 static IP work in ESPHome?

Yes. Use:

manual_ip:

This is the recommended esphome esp32 static ip method.

9. How to write esp32 static ip yaml for Home Assistant?

Example:

manual_ip:
  static_ip: 192.168.1.91

Perfect for home assistant esp32 static ip integration.

10. How do I get ESP32 IP address?

Use:

WiFi.localIP();

This returns the current IP.

11. Can I use esp32 static ip idf in production?

Yes. ESP-IDF allows low-level control for industrial IoT.

12. What is the best way to fix esp32 static fixed ip address conflicts?

Use an IP above the DHCP pool, like:

192.168.1.200.

13. Does esp32 server static ip improve reliability?

Yes. A server must have a fixed IP so clients always know where to connect.

14. Can ESP32 use static IP with MQTT?

Absolutely. MQTT dashboards work better with a esp32 use static ip setup.

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