GetASCIIResponseCode looks ahead too far [ESP32]

[xennex22]

GetASCIIResponseCode search all of the rx buffer for keywords like OK, ERROR etc.

If the data arrives line by line this is ok. If the data arrives all at once then GetASCIIResponseCode will generally find OK and then ignore the preceding data. I note that AT+GMR has special processing to cope with this.

The solution is for GetASCIIResponseCode (and its associated functions) to only search the buffer for one line when matching strings.