ultrasonic sensor HC-SR04 interface with arduino

[Harish Achar]

Hi,

I am using 2 ultrasonic sensors consider it at A and B. Which are placed in opposite directions.
I will initiate trigpinA and want to read pulse from echopinB (not echopinA). How do I do that?
I am getting 0 value. Sensor works for trigpinA and echopinA. Not working for trigpinA and echopinB.
Please suggest.

 

[danadakk]

Post your code and schematic....

 

[FvM]

I guess it's not possible. HC-SR04 is not designed as detector for externally generated pulses. What do you want to achieve, tof measurement?

 

[Harish Achar]

I guess it's not possible. HC-SR04 is not designed as detector for externally generated pulses.

Any solution for this?