Only to test without oscilloscope.here is my wifi code from Stefan....
Try to change the code frequency and check the output voltage at the out of the L298N driver (+ or - 10V) at the sigcode
{ 1, 1, -1, -1, 1, -1, 1, -1, -1, 1, -1, 1, 1, -1, -1, 1, -1, -1, 1, -1, -1, 1, 1, -1 };
Actual frequency is 1 cycle each 104 microsecond test with 1 cycle each 1000000 micro second, BUT i can't tell you if it's possible .
Code:
Serial.begin(115200);
timer = timerBegin(0, 80, true);
timerAttachInterrupt(timer, &onTimer, true);
timerAlarmWrite(timer, 1000000, true);