In a sketch I have a printf line with a %d, and I want to print "%" as text after the value.
But the text after that starts with an "s" (I think that's the problem).
The ESP-12 I'm running this on crashes because of this, even with a space between the % and s.
Serial.printf("signal %d%\n", value); // works
Serial.printf("%d% signal\n", value); // crashes the ESP
Serial.printf("%d % signal\n", value); // also crashes the ESP
Not important, because I can use two print lines, or move things around, but I like to know if there is another way around this.