I am trying to figure out how to capture the OK or the ERROR from a SIM800l.
I have tried
mySerial.println("AT");
while (mySerial.available() > 0 ) {
String str = mySerial.readString();
Serial.println(str);
if (str.equals("OK")) {
Serial.println("ok");
} else {
Serial.println("unknown");
}
}
But I always getting nothing back?
You can use .indexOf to find characters in a String. It returns a -1 if a match is not found. See https://www.arduino.cc/reference/en/language/variables/data-types/string/functions/indexof/
mySerial.println("AT");
String str;
while (mySerial.available() > 0 )
{
str = mySerial.readString();
Serial.println(str);
if (str.indexOf("OK") != -1)
{
Serial.println("ok");
} else if (str.indexOf("ERROR") != -1)
{
Serial.println("error!");
} else {
Serial.println("unknown");
}
}
