How to set host name? #2826

MisterBE2 · 2017-01-03T18:30:59Z

Basic Infos

Is there any command which sets ESP hostname?
I mean name which is displayed on router.

Right now it is something like this:

I would like to change it.

liquidfalcon · 2017-01-03T20:57:49Z

Yes, if you use the search facility of GitHub to search this repository for hostname, you will find the code and examples on how to set it.

MisterBE2 · 2017-01-03T21:03:55Z

I found this:

wifi_station_set_hostname( "Test" );

But it does not work :/
Can't compile.

MisterBE2 · 2017-01-04T17:07:59Z

After more digging i found it:

WiFi.hostname("Name");

anitech-embedded-systems · 2017-03-11T13:28:57Z

It worked for me 👍

rhdw · 2017-07-22T07:31:53Z

Can you inform me where is the right Position of WiFi.hostname("Name"); in sourcecode ?
I use the following libraries and code, but it does not work

#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>
...
    WiFi.mode(WIFI_STA);
    WiFi.begin(ssid, passwort);
    if (WiFi.status() == WL_CONNECTED) {
      WiFi.hostname("WebPool");
      ...

mcmillion · 2017-07-22T13:28:33Z

You need to call WiFi.hostname() before WiFi.begin()

devyte · 2017-07-22T14:34:42Z

Since we're on this topic, what is the correct way to change the hostname later on? Would the wifi need to be restarted or something?

…

On Jul 22, 2017 9:28 AM, "Matthew McMillion" ***@***.***> wrote: You need to call WiFi.hostname() before WiFi.begin() — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#2826 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AQC6BlUWKPViYWHGw1wCvU9P-cgBb7o2ks5sQfkMgaJpZM4LZ5Iu> .

kdbqlb · 2017-07-28T12:40:23Z

Doesn t work

petely · 2017-08-12T17:47:23Z

Thank you.
This works:

Serial.begin(115200);
  delay(10);
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.hostname("relay");
  WiFi.begin(ssid, password);
 
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("");
  Serial.println("WiFi connected");
 
  // Start the server
  server.begin();
  Serial.println("Server started");

Serial monitor log:

Connecting to astro-net
..
WiFi connected
Server started
Use this URL to connect: http://192.168.1.54/

**from Linux box on the same subnet:**
corv-root: ping 192.168.1.54
PING 192.168.1.54 (192.168.1.54) 56(84) bytes of data.
64 bytes from 192.168.1.54: icmp_seq=1 ttl=128 time=6.47 ms
64 bytes from 192.168.1.54: icmp_seq=2 ttl=128 time=1.98 ms
64 bytes from 192.168.1.54: icmp_seq=3 ttl=128 time=1.92 ms

**and then ...**
corv-root: ping relay
PING relay (192.168.1.54) 56(84) bytes of data.
64 bytes from relay (192.168.1.54): icmp_seq=1 ttl=128 time=2.66 ms
64 bytes from relay (192.168.1.54): icmp_seq=2 ttl=128 time=2.53 ms
64 bytes from relay (192.168.1.54): icmp_seq=3 ttl=128 time=1.89 ms

kdbqlb · 2017-08-13T07:01:26Z

And how do you See the Hostname ??? Thanks Klaus-Dieter 🚴🏊🏼⛵️⛷🎾😊

…

Am 12.08.2017 um 19:47 schrieb petely ***@***.***>: Thank you. This works: ` Serial.begin(115200); delay(10); Serial.print("Connecting to "); Serial.println(ssid); WiFi.hostname("relay"); WiFi.begin(ssid, password); while (WiFi.status() != WL_CONNECTED) { delay(500); Serial.print("."); } Serial.println(""); Serial.println("WiFi connected"); // Start the server server.begin(); Serial.println("Server started"); ` Serial monitor log: Connecting to astro-net .. WiFi connected Server started Use this URL to connect: http://192.168.1.54/ from Linux box on the same subnet: corv-root: ping 192.168.1.54 PING 192.168.1.54 (192.168.1.54) 56(84) bytes of data. 64 bytes from 192.168.1.54: icmp_seq=1 ttl=128 time=6.47 ms 64 bytes from 192.168.1.54: icmp_seq=2 ttl=128 time=1.98 ms 64 bytes from 192.168.1.54: icmp_seq=3 ttl=128 time=1.92 ms and then ... corv-root: ping relay PING relay (192.168.1.54) 56(84) bytes of data. 64 bytes from relay (192.168.1.54): icmp_seq=1 ttl=128 time=2.66 ms 64 bytes from relay (192.168.1.54): icmp_seq=2 ttl=128 time=2.53 ms 64 bytes from relay (192.168.1.54): icmp_seq=3 ttl=128 time=1.89 ms — You are receiving this because you commented. Reply to this email directly, view it on GitHub, or mute the thread.

BRMateus2 · 2017-08-30T15:15:01Z

You can see in the router or by nslookup . There seems to be no way of pushing in the hostname to the code, other than settings yourself an array of char and WiFi.hostname(array)

By the way, this might help lots of people who needs more detailed WiFi report after connect:

#include <ESP8266WiFi.h>

//Ethernet or WiFi connection settings
const char* WiFi_hostname = "ESP8266-0";
const char* WiFi_SSID = "FORAPSDB-MATEUSMT-DDWRT";
const char* WiFi_password = "";

void setup(){
	const int serial_baud_bit_rate = 2000000; Serial.begin(serial_baud_bit_rate); //Serial Baud Bit Rate
	setup_connect_to_WiFi(); //Call for the WiFi Connection
}

void setup_connect_to_WiFi(){
	unsigned int WiFi_connect_delay_try = 500; //Delay of the retry to connect to WiFi
	WiFi.hostname(WiFi_hostname);
	WiFi.mode(WIFI_STA); //Indicate to act as wifi_client only, defaults to act as both a wifi_client and an access-point.
	WiFi.begin(WiFi_SSID, WiFi_password); //Try to connect now
	Serial.print("Connecting to \"" + String(WiFi_SSID) + "\" with " + String(WiFi_connect_delay_try) + "ms interval with mode WIFI_STA"); Serial.printf("%s", WiFi.mode(WIFI_STA) ? "" : ", mode failed!!");
	while(WiFi.status() != WL_CONNECTED){
		/*Note: if connection is established, and then lost for some reason, ESP will automatically reconnect. This will be done automatically by Wi-Fi library, without any user intervention.*/
		delay(WiFi_connect_delay_try);
		Serial.print(".");
	}
	Serial.print("\nConnected to " + String(WiFi_SSID) + " with IP Address: "); Serial.print(WiFi.localIP()); Serial.print("\n");
}

devyte · 2017-10-04T22:57:41Z

WiFi.hostname() is currently working in latest git. Closing as resolved.

lbottero · 2017-10-20T22:52:10Z

/* in some cases, (I had this problem) need to put after WiFi.begin, this MDNS.begin("hostname"), dontt forget to include this #include <ESP8266mDNS.h>
This works:
*/
#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>
#include <ESP8266mDNS.h>
...
WiFi.mode(WIFI_STA);
WiFi.hostname("WebPool");
WiFi.begin(ssid, passwort);
MDNS.begin("WebPool");
if (WiFi.status() == WL_CONNECTED) {

...

brianjmurrell · 2018-01-26T20:08:49Z

  WiFi.hostname("foobar");
  WiFi.begin(ssid, password);

does not seem to be setting the name here. It still uses it's ESP_XXXXXX when requesting a DHCP lease and also uses esp8266-XXXXXX.local in the mDNS name.

I'm not sure I'm using version 2.4.0 of esp8266/Arduino (yet) but not sure how to find that out. I'd also be happy to upgrade to 2.4.0 if I am not, but not sure how to do that either.

lucaspiller · 2018-02-12T10:47:48Z

I'm also seeing the same behaviour @brianjmurrell. I'm using PlatformIO, platform espressif8266 1.6.0, which includes the 2.4.0 release of this project. My code is as follows:

WiFi.hostname("fan");                                                                                                                                                                                                                                    
WiFi.mode(WIFI_STA);                                                                                                                                                                                                                                     
WiFi.begin(WIFI_SSID, WIFI_PASSWORD);

lrmoreno007 · 2018-02-12T11:35:41Z

Try to restart your router.

brianjmurrell · 2018-02-12T12:07:17Z

Try to restart your router.

Why? What does my router have to do with setting the hostname on my ESP?

lucaspiller · 2018-02-12T12:23:02Z

@lrmoreno007 Well that is embarrassing, but yes it worked. I'm not sure why though, as I am able to change the hostname of virtual machines without having to do that. I guess the DHCP implementation in the Espressif SDK isn't 100% spec compliant. Thanks!

lrmoreno007 · 2018-02-12T12:48:38Z

It's not embarrassing. Depending on the configuration of your network, the router can make the DNS server function, was a possibility and that is why I said that you should try it.

And also because it is the best trick of a computer technician ... restart the router xD

d-a-v · 2018-02-13T00:39:30Z

WiFi.hostname is broken in 2.4.0 with lwip-v2. Please update to latest git or use lwip-v1.4.

tokra · 2018-03-30T17:57:26Z

Not working for me:

void wifiSetup() {
  char* WiFi_hostname = "ESP8266-2";
  WiFi.config(ip, dns, gateway, subnet_mask);
  WiFi.hostname(WiFi_hostname);
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  Serial.println("");

  // Wait for connection
  while (WiFi.status() != WL_CONNECTED) {
    delay(10);
    Serial.print(".");
  }
  Serial.println("");
  Serial.print("Connected to : ");
  Serial.println(ssid);
  Serial.print("IP address   : ");
  Serial.println(WiFi.localIP());
  Serial.print("GW address   : ");
  Serial.println(WiFi.gatewayIP());
  Serial.print("MAC address  : ");
  Serial.println(WiFi.macAddress());
  if (mdns.begin(WiFi_hostname)) {
    Serial.println("mDNS responder started !");
  }
}

BRMateus2 · 2018-03-30T18:05:06Z

You should not set config if you are not using an static IP routing; your router has DHCP activated? If yes, some routers simply block any data from static users.

Edit-- you set WIFI_STA;
Well, which part isn't working? Try WiFi.mode before WiFi.config.

mindquanta · 2018-06-16T03:46:26Z

It worked for me...

void setup(void){
pinMode(led, OUTPUT);
digitalWrite(led, 0);
Serial.begin(115200);
WiFi.mode(WIFI_STA);
WiFi.hostname("IotONE");
WiFi.begin(ssid, password);
Serial.println("");

// Wait for connection
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");

duncan-a · 2018-06-16T05:17:39Z

Using hypen ("-") in a hostname seems to cause problems - it shouldn't, but it did for me...

…

On Fri, 30 Mar 2018, 19:57 Tomas Kramaric, ***@***.***> wrote: Not working for me: void wifiSetup() { char* WiFi_hostname = "ESP8266-2"; WiFi.config(ip, dns, gateway, subnet_mask); WiFi.hostname(WiFi_hostname); WiFi.mode(WIFI_STA); WiFi.begin(ssid, password); Serial.println(""); // Wait for connection while (WiFi.status() != WL_CONNECTED) { delay(10); Serial.print("."); } Serial.println(""); Serial.print("Connected to : "); Serial.println(ssid); Serial.print("IP address : "); Serial.println(WiFi.localIP()); Serial.print("GW address : "); Serial.println(WiFi.gatewayIP()); Serial.print("MAC address : "); Serial.println(WiFi.macAddress()); if (mdns.begin(WiFi_hostname)) { Serial.println("mDNS responder started !"); } } — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#2826 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ALP8xTKTqzLg8elKXBsQjyZacD27E_Vvks5tjnIWgaJpZM4LZ5Iu> .

rayvt · 2018-06-18T16:57:47Z

It doesn't work right. Sometimes it gets the name I set in WiFi.hostname(), and sometimes it gets the "ESP_xxx" name.

manulsan · 2018-11-27T01:52:42Z

Above comments are all right.

Setting host name works at LwIP V 1.4 Above
Set as following way

Sketch menu ==> Tool ==> LwIP Variant xxxxx==> "V1.4 Higher Bandwidth"

Then it will work.

maythamfahmi · 2019-01-01T22:23:05Z

for me, setHostname helped:

WiFi.begin(ssid, password);
WiFi.setHostname("node_name_1");

And if you want to fetch the host name later in code:
WiFi.getHostname();

Yonni20140812 · 2019-05-03T07:48:42Z

If doesn't work, try wash flash, may help

ewaldc · 2019-08-01T12:14:02Z

I tried many of the posted suggestions, but none of them worked for me using 2.5.2 or 2.6_dev.
So far the only code sequence that worked reliably is:

 wifi_station_set_hostname(myhostname);
 WiFi.begin(ssid, pwd);
 DbgPrintln("hostname::", WiFi.hostname());

If you put certain Wifi commands in between the setting of the hostname and WiFi.begin (e.g. WiFi.enableSTA(true)) it no longer works and the hostname becomes again the default "ESP_<id>".

It also does not work for soft AP mode.

wifi_station_set_hostname(myhostname);
WiFi.softAP(APssid, pwd);
DbgPrintln("hostname::", WiFi.hostname());

produces an empty hostname. Adding multiple WiFi.hostname(myhostname) or wifi_station_set_hostname(myhostname) statements before or after WiFi.softAP, does not change the result. Nor does adding MDNS.begin(myhostname); Another question is of course: does it really matter if the hostname is not correctly set? In station mode, clients can use the name provided by the router's DNS (or DHCP) service, while for AP mode, mDNS can be used.

BRMateus2 · 2019-08-01T17:26:47Z

I tried many of the posted suggestions, but none of them worked for me using 2.5.2 or 2.6_dev.
produces an empty hostname. Adding multiple WiFi.hostname(myhostname) or wifi_station_set_hostname(myhostname) statements before or after WiFi.softAP, does not change the result. Nor does adding MDNS.begin(myhostname); Another question is of course: does it really matter if the hostname is not correctly set? In station mode, clients can use the name provided by the router's DNS (or DHCP) service, while for AP mode, mDNS can be used.

You might have found a pretty bug, I cannot test what you meant because it's been some 7 months since I stopped with Arduino for now - it might be important to open a new ticked with your code, if those functions in the documentation really don't work.

About the hostname, it does not matter if you set it or don't set, other than being able to call the device by name as it is probably automagically linked to a DNS server, otherwise you have to know the dynamic IP - and even so, there are some routers like MikroTik, which do not link the DHCP leases to the DNS cache, making the device hostname useless outside the router management interface.

d-a-v · 2019-08-01T17:40:21Z

Without MCVE we can't help.

The one in OP works:

#include <ESP8266WiFi.h>
void setup() {
  Serial.begin(115200);
  WiFi.hostname("moon");
  WiFi.begin(STASSID, STAPSK);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println(WiFi.hostname());
}

void loop () {
}

console:

19:37:42.546 -> SDK:2.2.2-dev(38a443e)/Core:2.5.2-102-g8ee720b9=20502102/lwIP:STABLE-2_1_2_RELEASE/glue:1.1-8-g2314329/BearSSL:89454af
19:37:42.546 -> wifi evt: 2
19:37:42.613 -> scandone
19:37:43.109 -> .....scandone
19:37:46.422 -> state: 0 -> 2 (b0)
19:37:46.422 -> .state: 2 -> 3 (0)
19:37:46.422 -> state: 3 -> 5 (10)
19:37:46.422 -> add 0
19:37:46.422 -> aid 1
19:37:46.422 -> cnt 
19:37:46.455 -> 
19:37:46.455 -> connected with xxxxxx, channel 1
19:37:46.455 -> dhcp client start...
19:37:46.455 -> wifi evt: 0
19:37:46.488 -> ip:10.0.1.166,mask:255.255.255.0,gw:10.0.1.254
19:37:46.488 -> wifi evt: 3
19:37:46.919 -> .
19:37:46.919 -> WiFi connected
19:37:46.919 -> moon
19:37:56.429 -> pm open,type:2 0

on openwrt router:

root@xxxxx:~# ping moon
PING moon (10.0.1.166): 56 data bytes
64 bytes from 10.0.1.166: seq=0 ttl=128 time=1.903 ms

Closing

edit ah, already closed :)

M1DLG · 2020-05-10T11:43:13Z

Another question is of course: does it really matter if the hostname is not correctly set?

It does matter if you are setting up a cluster of sensors and each have their own ID and name. It gets hard to track them by random strings when an actual name is easy to read and display.

Make the device appear with a meaningful name in router device lists. See discussion: esp8266/Arduino#2826

jordanadania · 2023-01-23T09:32:50Z

WiFi.config does not allow setting a custom hostname. At least not in the router control panel list of attached devices.

Static IP does not mix well with Custom hostname apparently.

govego · 2023-07-15T07:11:49Z

Try after connected to router, first connect to esp8266 to SSID router after change hostname:

while (WiFi.status() == WL_CONNECTED)
{
Serial.printf("Default hostname: %s\n", WiFi.hostname()); // Current Hostname
WiFi.hostname("SuMotoru"); //Set new hostname
delay(2000);
Serial.printf("New hostname: %s\n", WiFi.hostname());// new Hostname
..........................

devyte closed this as completed Oct 4, 2017

readmodifywrite mentioned this issue Jan 29, 2018

Set wifi hostname sapphireos/chromatron#14

Closed

Hieromon mentioned this issue Dec 22, 2018

wdt error on autoconnect-enhance-autoConnectAux Hieromon/AutoConnect#25

Closed

elbosso mentioned this issue Jan 20, 2019

add expressive hostname to devices elbosso/sonoffSocket#6

Closed

DaleSchultz mentioned this issue Apr 21, 2019

Webconfiguration - HOSTNAME - new feature request tzapu/WiFiManager#578

Closed

stuartpittaway mentioned this issue Sep 28, 2020

Wifi hostname is not set on controller stuartpittaway/diyBMSv4Code#36

Closed

BinaryMan32 added a commit to BinaryMan32/keezer that referenced this issue Nov 13, 2020

set WiFi hostname to keezer

774ce5b

Make the device appear with a meaningful name in router device lists. See discussion: esp8266/Arduino#2826

btRooke mentioned this issue Nov 19, 2021

Set hostnames of IoT devices btRooke/melbourne-place#4

Open

matthias-bs mentioned this issue Dec 4, 2022

Question: Does bresser 7-channel work? matthias-bs/BresserWeatherSensorReceiver#18

Closed

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How to set host name? #2826

How to set host name? #2826

MisterBE2 commented Jan 3, 2017 •

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How to set host name? #2826

How to set host name? #2826

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