sensoresp/include/sensor_hcsr501.cpp

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// PIR Sensors HC-SR501
// pir sensor needs 5v through an inductor for filtering. output level is 3.3v
// 100nF capacitor SENSOR_HCSR501_minchangeshould be soldered between pins 12 and 13 of BISS0001 to stop interference from esp causing false triggers (in some setups). source: https://www.letscontrolit.com/forum/viewtopic.php?t=671
// hc-sr501 should also be a few cm away from the esp. interference can cause false triggering
// poti closer to jumper is sensitivity (cw increases). other poti is pulse time (cw increases).
// time set to output around 30s pulse
#include "sensor_hcsr501.h"
Sensor_HCSR501::Sensor_HCSR501(int pin)
{
hcsr501pin=pin;
}
void Sensor_HCSR501::init() //Things to be done during setup()
{
Serial.println("initializing HCSR501");
pinMode(hcsr501pin, INPUT_PULLUP);
init_ok=true;
}
//Also called during setup()
void Sensor_HCSR501::setSettings(unsigned long senddelaymax, unsigned long readdelay)
{
data.senddelaymax=senddelaymax;
data.readdelay=readdelay;
}
//Called during setup
void Sensor_HCSR501::advertise(HomieNode& p_sensorNode)
{
sensorNode = &p_sensorNode;
sensorNode->advertise("motion");
}
void Sensor_HCSR501::sensorloop()
{
if (init_ok) {
sensordata &d=data;
bool _changed=false;
if (millis() >= (d.lastreadtime+d.readdelay)) {
if (digitalRead(hcsr501pin) != (d.value>0)){
_changed=true;
}
d.lastreadtime=millis();
}
if (_changed || millis() >= (d.lastsent+d.senddelaymax)) { //send current value after some long time
Serial.print("Sending motion. reason=");
if (_changed) Serial.println("change"); else Serial.println("time");
if (digitalRead(hcsr501pin)){
Homie.getLogger() << "motion " << ": " << "true" << endl;
sensorNode->setProperty("motion").send(String("true"));
d.value=true;
}else{
Homie.getLogger() << "motion " << ": " << "false" << endl;
sensorNode->setProperty("motion").send(String("false"));
d.value=false;
}
d.lastsent=millis();
}
}
}