I tried to use dtostrf() for the Due, so I tried
which did not work (error: 'dtostrf' was not declared in this scope),
worked (IDE 1.8.8 ):
char buf; Serial.print("dtostrf test "); dtostrf(3.456, 7, 4, buf); Serial.println(buf);
what am I missing?
is there perhaps a macro #define which targets either ARM Cortex board?