Using two ultrasonic sensors together

Question

Using two ultrasonic sensors together, how can I enable one before the other?

• Dave X: Do you have a circuit? Any code?

Answer 1

You need to tell the sensor to send their pulse using the trigger line. So triggering isn't a problem. The problem is that you might get an echo returned on both sensors, but you know which sensor sent the pulse so you can ignore the return that was received by the 'wrong' sensor in your code. So

While(1)
{
 SendPulse(SensorTx1);
 GetEcho(SensorRx1);
 SendPulse(SensorTx2);
 GetEcho(SensorRx2);
}

Is that what you mean? If not please can you expand you question?