I am having problems with the hostname of my ESP8266. I am using the MDNSResponder and I can successfully access my device with mydevice.local
However, my WiFi router (Netgear WGR614) list the device as ESP_FEA38A. When I use 'Angry IP Scanner' on my mac, there is no hostname listed. Both, the ip scanner and the WiFi router both recognize several raspberrys and other devices like airport express.
Does anybody know what other host naming mechanisms are being used and how I can get my ESP8266 device getting listed with hostname?
If you are using the Arduino environment in the WiFi library there is a method for setting the hostname:
WiFi.hostname(newHostName);
Once I set this to the desired name the ESP8266 showed correctly in DHCP, on the router and, when available, was pingable. From my experimenting this needs to be done before any of the other WiFi actions for it to work effectively.
You can also include the Espressif SDK functionality although looking at the Arduino ESP8266 GitHub project it appears to already be included.
The Espressif SDK sets the hostname with the following command:
wifi_station_set_hostname(myHostname);
Related
Would anyone like to help me with this problem please?
how to connect/control Nodemcu esp8266 wi-fi module from different network for control iot devices from outside of any home/ house?
Internet connection problem from different network for NodeMCU ESP8266 which I am using for IOT home automation.
Actually, in case of an class project, I have used some code (also coppied some code and took help from some website) from internet and also used Blynk for controll my ESP8266.
But not i want to make a personal app by which app I can control my devices outside from my home.
I have already connected with my WI-FI router with my home network!!
It worked well,
But i don't know how to do the same thing from different netwrok.
If possible I think anyone can help me....
Thank you.
To everyone.
This has been answered in greater detail on both the Arduino and Internet of Things StackExchange sites. In summary:
For safety, it is difficult to start a connection to a device on another local network. Devices on WiFi networks are protected from the Internet by a firewall, which is normally configured to return responses to requests sent by the devices, but block all unsolicited messages. Even if the firewall allows an incoming connection on a given port, "port forwarding" or other custom configurations are needed for unexpected messages to reach one of the multiple devices on the network (the devices usually share the same public IP address of the network and external systems' messages cannot reach the right local address without forwarding by the router).
Any device exposed to unsolicited requests like this is at risk of being attacked and can pose a risk to other systems on the network. It is thus safer to leave the firewall the same and instead make the device subscribe to an external webserver, which acts as a mailbox for incoming messages. Then, you can send requests to the server from anything with an internet connection, and the server will store them and relay them to the ESP8266 whenever the ESP asks. MQTT protocol using a server-side broker program like Mosquitto and a client like PubSubClient on your ESP8266 could work for this sort of publish-subscribe model, and MQTT tutorials and explanations are available both on both tool sites and Stack sites.
You can use Arduino IDE to program ESP8266 device.
https://randomnerdtutorials.com/how-to-install-esp8266-board-arduino-ide/
After installing ESP8266 in Arduino IDE. You need to connect ESP8266 with WiFi router(which have internet connected). Once your device is connected with a WiFi router. you can MQTT protocol to communicate with the server. You can use the following library in Arduino to implement MQTT client in ESP8266. ESP8266 is used to send and receive data from a different network. ESP8266 is subscribed to a particular topic. You can publish data to that topic from different MQTT client.
https://github.com/Imroy/pubsubclient
Use the Following link to get more familiar with MQTT protocol
https://www.hivemq.com/blog/mqtt-essentials-part-1-introducing-mqtt
You can use MQTTfx desktop application to send and receive data from NodeMcu(ESP8266).
MQTT basic diagram for understanding
I'd like to know that a specific device (phone/tablet) has joined my WiFi network created by ESP8266 microcontroller. It shouldn't require any installed apps on that phone/tablet, if possible, to simplify the whole setup.
So I think I need to somehow identify connected clients, and MAC is not an option because it is subject to change randomly on, say, Apple devices.
Maybe it's possible to collect host names of connected clients?
I know that Windows and Ubuntu clients send their host names when getting IP from DHCP server (see here). Also, it's possible to find such information on, say, home Wi-Fi router admin web page (i.e. host names, their IPs and MACs).
I'm running DHCP server on ESP8266, but I haven't found any API that allows to get peer host name (i.e. reverse DNS). Does ESP8266 support getting such information?
I'm using Embarcadero RAD Studio Delphi XE8.
Multi-Device Application app tethering components are designed for traditional WiFi and Bluetooth coupling. Does it support also Internet connections?
I would like to try to make small p2p app. I'm using App tethering via Wifi but I would like to connect App tethering via internet connection.
how to do that ?
Yes, TCP/IP (LAN and Internet) is also supported. This is clearly explained in the documentation.
Using App Tethering
The app tethering feature does not depend on a specific transport or protocol, and new transports and protocols can be implemented using the app tethering API. The RTL provides built-in support for IP and Classic Bluetooth connections. IP support includes connecting applications running on the same device.
IP connections are not limited to WiFi only. WiFi is just a wireless connection to a LAN, much like Ethernet is for wired connections. IP works the same regardless of the type of connection used.
Connecting to Remote Applications Using App Tethering | Connecting to Applications Outside Your Subnet
By default, both AutoConnect and DiscoverManagers perform the discovery on the subnet of the local area network (LAN) where the device running your application is.
However, you can use their optional parameter Target to override this behavior, and specify an IP address or subnet:
To specify an IP address to search for remote managers, specify that IP address as the Target.
To specify a subnet of IP addresses, specify an IP address with a 0 as its fourth number. For example, if you specify "192.168.4.0" as the Target, your manager searches the 192.168.4.x subnet for remote managers. Note: You can not specify wider subnets. For example, "192.168.0.0" is not supported.
I'm using Embarcadero RAD Studio Delphi XE8.
Multi-Device Application app tethering components are designed for traditional WiFi and Bluetooth coupling. Does it support also Internet connections?
I would like to try to make small p2p app. I'm using App tethering via Wifi but I would like to connect App tethering via internet connection.
how to do that ?
Taken from the documentation
Connecting to Applications Outside Your Subnet
By default, both AutoConnect and DiscoverManagers perform the
discovery on the subnet of the local area network (LAN) where the
device running your application is. However, you can use their
optional parameter Target to override this behavior, and specify an IP
address or subnet: To specify an IP address to search for remote
managers, specify that IP address as the Target. To specify a subnet
of IP addresses, specify an IP address with a 0 as its fourth number.
For example, if you specify "192.168.4.0" as the Target, your manager
searches the 192.168.4.x subnet for remote managers. Note: You can not
specify wider subnets. For example, "192.168.0.0" is not supported.
In other words you need to use the IP address as the optional ATarget parameter of the mentioned calls. The differences to local tethering are minor, which I guess is why there are not many examples.
See the Embarcadero web site for more details
Try VPN connect two device. If your 2 device is same vpn (For ex: Softether , Openvpn). you can discover other device around the world. (Dont forget enable vpn server settings to discover other devices options)
So I have an ejabberd (XMPP) server setup on my MacBook. Connects fine with Simulator, only intermittently on the device. The two times it hasn't connected were at cafes that had sign-on gateways for their Wi-Fi. I know nothing when it comes to networks, but I'm guessing this is a Firewall thing?
I'm supposing I can't get around the firewall without an elaborate workaround.
I've found that turning off Wi-Fi on both devices and turning on tethering so that both devices are communicating via data works. However, I'd rather not do this as my data plan is limited and I'd like to be freely internet-connected while I work.
Is there a way to setup XCode to have the phone use the USB connection to access the server on the MacBook? Or maybe some other way I'm not imagining?
Bluetooth doesn't work.
I don't believe that the problem is with some kind of firewall on the network…
Try using the local IP address instead of the hostname, It will change from network to network. To get it, you can open the network utility
In this case it would be [xmppStream setHostName:#"172.16.1.2"];