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For questions about the HC-SR04 ultrasonic ranging sensor.
1
vote
Accepted
How often can I ping an HC-SR04 ultrasonic sensor?
How often can I ping an HC-SR04 ultrasonic sensor?
This ping() function is vulnerable to interrupts during the pulseIn(). This implies that a delay needs to wait for queued interrupts as from, fo …
1
vote
Using HC-05 to play a sound on an app
Every time the Arduino detects motion, I want a sound to be played on the phone of the person with the app. In order to do this, I plan on using a HC-05 Bluetooth Module.
Does anyone have any suggest …
2
votes
Why does HC-SR04 return 0s in this sketch
Why does the same block of code act differently in different sketches?
There are different interrupt sources in the sketches that may affect pulseIn(). Try using a more advanced method to measure …