ESP8266 Community Forum

I'm interested if it's possible to somehow discover the devices which is on the same network as my ESP8266.
On laptop I would simply just listen to the ARP broadcasts, but I don't know if it's possible with the ESP8266 SDK.

I don't care if it takes time or not 100% accurate (like te previously mentioned ARP boradcast), I just want to check if I can find my specific computer without any information. ( eg. I'm running an FTP server on port XXX - after that the ESP8266 Will try if it can connect to that port on every computer on the device. If succeed, then my machine is found )

Thanks!

LUA and Arduino IDE do have methods to do this , I'm not sure if basic has implemented this....Unfortunately its been a while since I been coding , and don't remember the code..

I think I found the procedures using google.. The LUAmethod seemed to be more repeatable the the Arduino IDE version , i.e. showing same discoveries.....

Basic? I'm programming in C/Arduino, so if those already have implementations, that would be awesome

I'll look around google, but if you can find some usable links, then please send it to me Thank you.

this may be helpful https://github.com/esp8266/Arduino/issues/132
also Arduino code snip


/code
/*==============================================================================*/
String scanNetworks() {
byte numSsid = WiFi.scanNetworks();
String s = "** Scan Networks **\r\n";
s += "SSID List:";
s += numSsid;
s += "\r\n";
for (int thisNet = 0; thisNet<numSsid; thisNet++) {
s += thisNet;
s += ") ";
s += WiFi.RSSI(thisNet);
s += " AP: ";
s += WiFi.SSID(thisNet);
s += ((WiFi.encryptionType(thisNet) == ENC_TYPE_NONE)?" ":"*");
s += "\r\n";
}
return s;
}
/code/