TCP connection " link typ ERROR" / no response
Posted: Tue Mar 01, 2016 10:16 amHello ESP Arduino world.
I have written this code to connect to website via TCP. The module is already connected to wifi
Here is Serial output for above code.
It is connecting to the internet perfect, but I cannot get the module to create a TCP connection. I have tried the other syntax ("AT+CIPSTART=4,"TCP","IP",PORT) and also using AT+CIPMUX=0 and will have same problem or no response.
Any ideas??
Thank you
I have written this code to connect to website via TCP. The module is already connected to wifi
Code: Select all
altSerial.println("AT+CIPMUX=1");
delay(500);
if(altSerial.find("OK"))
Serial.println("ready to go");
//create string to generate TCP connection
String cmd2 = "AT+CIPSTART=\"TCP\",\""; //make this command: AT+CIPSTART=1-4 (sometimes ommitted),"TCP","107.180.3.137",80
cmd2 += DST_IP;
cmd2 += "\",80";
altSerial.find("OK");
altSerial.println(cmd2); //send command to device
delay(1000);
unsigned long t=millis()+3000;
while( t > millis() ) {
while( altSerial.available()) {
char c=altSerial.read();
Serial.print(c);
} } Here is Serial output for above code.
Network recognized!
resetting . . . . .ready to go
AT+CIPMUX=1
OK
AT+CIPSTART="TCP","107.180.3.137",80
Link typ ERROR
resetting . . . . .ready to go
AT+CIPSTART="TCP","107.180.3.137",80
Link typ ERROR
It is connecting to the internet perfect, but I cannot get the module to create a TCP connection. I have tried the other syntax ("AT+CIPSTART=4,"TCP","IP",PORT) and also using AT+CIPMUX=0 and will have same problem or no response.
Any ideas??
Thank you