Code for sensor nodes connected by radio receiver with gateway
Dependencies: mbed WakeUp coapRadioClient DHT11
distanceMeter.cpp
- Committer:
- Ka_myk
- Date:
- 2019-01-25
- Revision:
- 3:4ffffdb5230f
- Child:
- 6:5102672e8ff4
File content as of revision 3:4ffffdb5230f:
#include "distanceMeter.h" #include "mbed.h" void DistanceMeter::echoUp() { timer.start(); } void DistanceMeter::echoDown() { timer.stop(); timeUs = timer.read_us(); timer.reset(); timeReady = true; } DistanceMeter::DistanceMeter(PinName echoPin, PinName triggerPin): timeReady(false), echo(echoPin), trigger(triggerPin) { trigger = 0; } void DistanceMeter::initialize() { echo.rise(&echoUp); echo.fall(&echoDown); } int DistanceMeter::read() { trigger = 1; wait_us(10); trigger = 0; while(!timeReady) wait_us(100); timeReady = false; return timeUs * 17 / 1000; // dist in cm, (time * 340) / (2 * 10000) } int DistanceMeter::getSensorId() { return 0; }