Extracting IP address from a character array returned by ESP8266 module

Projects Programming
2

You can use strstr to find both quotation marks, then use strncpy to copy the correct part of the IP address into the new char array:

  char inString[] = "+CIFSR:STAIP,\"192.168.1.117\"";
  char IP[16];
  char* firstQuote;
  char* secondQuote;
  Serial.begin(115200);
  delay(100);
  Serial.println();
  Serial.println(inString);

  firstQuote = strstr(inString,"\"");
  secondQuote = strstr(firstQuote+1,"\"");
  char lengthOfIP = secondQuote - firstQuote - 1;
  strncpy(IP,firstQuote+1,lengthOfIP);
  IP[lengthOfIP] = '\0'; 

  Serial.println(IP);

but this ideally needs some checks to make sure that both quote marks actually exist and that they are a sensible space apart.
[edit]
Just realised there is a 'quicker' function, strtok() http://www.cplusplus.com/reference/cstring/strtok/
which you can use, but my example may help you understand how to do this type of thing more generally.