HC-SR04 Ultrasonic Sensor - rpi-srf - status not available

The node works for me (trig connected to pin10 - echo to pin 8, gnd to pin6 , vcc to pin 1)

There are a a few things to check

Have you got a newer 3.3V compatible version?

If using an old 5V version - you need to use some resistors to reduce the echo signal voltage

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