What would be an example of how to set the Arduino to have a static IP address?
I am looking for a function similar to the statement below from the Ethernet Library.
Ethernet.begin(MACadr, IPaddr);
I using a Wi-Fi shield.
Sorry, this is not possible. The reference for this claim is here.
Basically, all the DHCP stuff (the code that assigns the dynamic IP address) is baked-in to the firmware for the WiFi shield, and this code is not open, so you cannot update it.
"WiFi.config() allows you to configure a static IP address as well as change the DNS, gateway, and subnet addresses on the WiFi shield."
You can read more about this here:
http://arduino.cc/en/Reference/WiFiConfig
What I did in my situation was to set a Reservation on my router for this MAC address. This makes the code simple. For some reason, the MAC address that my WiFi shield was supposed to use isn't what it actually uses. I was able to look at the DHCP table on the router and find the MAC address it was using and create a reservation and we are good to go...
Related
I need to know the IP address of ESP32 on the local network(without printing ip on serial monitor ). The idea is to do mDNS or UDP broadcast to send the IP to the android application. The app will then use that IP to do the communication. Is there someone who has already done it?
Maybe a bit late, but nevertheless:
The function called "tcpip_adapter_get_ip_info" can be used to obtain your interface IP address, netmask and gateway. You can pass in TCPIP_ADAPTERE_IF_STA to get the information you desire.
#include <tcpip_adapter.h>
tcpip_adapter_ip_info_t ipInfo;
char str[256];
tcpip_adapter_get_ip_info(TCPIP_ADAPTER_IF_STA, &ipInfo);
sprintf(str, "%x", ipInfo.ip.addr);
Note that it is also given in the event handler:
case SYSTEM_EVENT_STA_GOT_IP:
eprintf(eLOG_EVENTQ,"IP: %s\r\n",
ip4addr_ntoa(&event>event_info.got_ip.ip_info.ip));
If you're looking to identify your ESP32 easily on the local network, you can simply use the mDNS service.
This will make your ESP32 accessible via user friendly hostname.
Example: myesp32.local
I'm new to arduino and I'm trying to use IPv6 with arduino UNO and ethernet shield(W5100).
I have found EtherSia IPv6 (https://github.com/njh/EtherSia) library and run MiniHTTPServer.ino sketches.
The serial monitor always print link-local address. I can't find a way to set global address.
[EtherSia MiniHTTPServer]
Failed to configure Ethernet
Our link-local address is: fe80:0000:0000:0000:9cb3:19ff:fec7:1b10
Our global address is: 0000:0000:0000:0000:0000:0000:0000:0000
Ready.
Any suggestions for IPv6 ethernet shield or IPv6 library for Arduino?
EtherSia library says that it does NOT support DHCPv6.
You may want to check if your local network environment is configured with DHCPv6.
"PHPoC Shield for Arduino" may be what you are looking for. Of course, it supports IPv6 including DHCPv6.You can get the detailed information about this library from the below.
download https://github.com/phpoc/arduino
manual http://www.phpoc.com/support/manual/phpoc_shield_for_arduino_library_reference/
Just check "ChatServerIPv6" sketch for testing IPv6.
EtherSia indeed does not support DHCPv6, but it does support SLAAC - Stateless Auto-configuration, which is widely supported and enabled by routers.
What type of router do you have?
An alternative is to configure the address and router statically:
// Configure a static global address and router addresses
ether.setGlobalAddress("2001:1234::5000");
if (ether.setRouter("fe80::f4c0:4ff:fefb:4186") == false) {
Serial.println("Failed to configure router address");
}
This is from the example here:
https://github.com/njh/EtherSia/blob/master/examples/MinimalStatic/MinimalStatic.ino
I would like to connect the nodemcu to some LEDs, running a HTTP server (RESTful presumably) and turn on/off accordingly. However, how can the devices in the same network find the device? I guess I could try static IP for esp8266, but that is not guarantee to work every time everywhere. So how can I scan the network to find that, or is there any better solution?
I think most people use multicast DNS (mdns) for this, a quick Google should give you some examples for the environment you use :)
I like using MQTT, which is a different protocol that uses a central broker, but it's probably not quite what you want.
Also, why would a fixed IP not work? Most routers allow to assign one based on MAC address, which should work consistently.
And finally, you should be able to set a hostname for the ESP (wifi_station_set_hostname in the ESP SDK, which I think you can call from Arduino also), which should make it known with your router under that name.
I set my DHCP server to always give the same IP address to my NodeMCUs based on their MAC addresses. They are also configured with mDNS but I don't have mDNS on my Android phone so it didn't help me.
Hi i'm trying to access my wifi shield's ip address on the browser but I keep getting Oops! Google Chrome could not connect to "IP ADDRESS".
Things I've done:
1.)Updated firmware on wifi shield using this link http://ohmyfarads.com/2013/11/11/updating-firmware-on-arduino-wifi-shield-for-dummies/
2.) uploaded the wifi WPA sketch from arduino site. My connection is WPA2
3.) I switched between arduino IDE 1.02 and 1.05 but no luck with either
4.) I'm using an arduino uno board that is attached to wifi shield
Help? Thanks!
This might be caused by incorrect router setup. Things you should look at:
1.You may have to first add device mac address to router list and assign it to the specific IP address you want to have.
2.The second option is that router may give his own address to this device by DHCP.
Remember that you have to choose nonroutable IP address for your shield. IP also has to be in your home address range. The simplest way to check that is:
1.Manu Start
2.Launch and type (or type in search) cmd
3.In console type "ipconfig"
Your local IP is in IPv4 .......... 192.168.x.x (most likely)
(in this case shield should have address like (192.168.x.y).
For more information about IP [look here][1]
You can also use Netscan tool to find out if shield is in your LAN.
I hope it will be helpful.
I want to send signals to a Phillips Hue Bulb from an Arduino Ethernet, but using only a local network. This means I plan to have a router with an Ethernet connection to both the Arduino and the Hue's bridge, but the router has no connection to the Internet. I read their API's page: http://developers.meethue.com/howhueworks.html and from that I think this could work, but I would like to be sure before buying a Hue kit. Anyone who owns one could assert this will indeed work?
Thanks!
Yes this will work :)
You only need internet to update the firmware of the bridge or if you want to control your lights from outside your own network.
You do need a way to find the ip address of your bridge though. So it's probably easiest to give your bridge a static ip or configure your router to always give the same ip to your bridge.