So I have an application that runs on the Arduino that passes info over serial. I'm using a ESP2866 to make it wireless.
Arduino->Serial->Esp2866->SocketConn->JavaSocket->Console
I have a working java socket server, that I can connect to with other applications. (Java, c++, ext.) And even across the network.
I just cant seem to get my ESP2866 to connect.
Iv tried several ESP2866 units, no success. Iv tried updating the firmware on each, nope.
AT -> OK
AT+RST -> ready
AT+CWMODE=1 -> OK
AT+CWJAP="name","pass" -> CONNECTED,GOTIP,OK
AT+CIPMUX=0 -> OK
AT+CIFSR -> 192.168.0.30
AT+CIPSTART="TCP","192.168.0.9","4160" -> ERROR
The lack of debug info is... Aggravating. Iv Seen other examples of this that worked. So whats the problem?
Additional info:
netstat -tulpn | grep 4160
tcp6 0 0 :::4160 :::* LISTEN 23058/java
(Edit 1:)Just tried restricting to IPV4 and rebinding the port. Nope.
InetAddress localAddress = Inet4Address.getByAddress(new byte[]{(byte) 192,(byte) 168,0,9});
System.setProperty("java.net.preferIPv4Stack", "true");
ServerSocket listener = new ServerSocket(port,20,localAddress);
//...Code to make socket work.
