update hcsr04.cpp by changing 20000 to 2000

Dependencies:   Stepper mbed SDFileSystem Ultrasonic PinDetect millis

Committer:
rschimpf78
Date:
Fri Jan 18 00:22:13 2019 +0000
Revision:
8:3f4d78017fd9
Parent:
0:88834eed3de0
1.17;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rschimpf78 0:88834eed3de0 1 http://mbed.org/users/mbed_official/code/mbed/builds/4336505e4b1c