67 lines
2.0 KiB
C++
67 lines
2.0 KiB
C++
// PIR Sensors HC-SR501
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// pir sensor needs 5v through an inductor for filtering. output level is 3.3v
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// 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
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// hc-sr501 should also be a few cm away from the esp. interference can cause false triggering
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// poti closer to jumper is sensitivity (cw increases). other poti is pulse time (cw increases).
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// time set to output around 30s pulse
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#include "sensor_hcsr501.h"
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Sensor_HCSR501::Sensor_HCSR501(int pin)
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{
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hcsr501pin=pin;
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sensordata data;
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}
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void Sensor_HCSR501::init() //Things to be done during setup()
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{
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Serial.println("initializing HCSR501");
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pinMode(hcsr501pin, INPUT_PULLUP);
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init_ok=true;
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}
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//Also called during setup()
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void Sensor_HCSR501::setSettings(unsigned long senddelaymax, unsigned long readdelay)
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{
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data.senddelaymax=senddelaymax;
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data.readdelay=readdelay;
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}
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//Called during setup
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void Sensor_HCSR501::advertise(HomieNode& p_sensorNode)
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{
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sensorNode = &p_sensorNode;
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sensorNode->advertise("motion");
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}
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void Sensor_HCSR501::sensorloop()
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{
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if (init_ok) {
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sensordata &d=data;
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bool _changed=false;
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if (millis() >= (d.lastreadtime+d.readdelay)) {
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if (digitalRead(hcsr501pin) != (d.value>0)){
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_changed=true;
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}
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d.lastreadtime=millis();
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}
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if (_changed || millis() >= (d.lastsent+d.senddelaymax)) { //send current value after some long time
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Serial.print("Sending motion. reason=");
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if (_changed) Serial.println("change"); else Serial.println("time");
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if (digitalRead(hcsr501pin)){
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Homie.getLogger() << "motion " << ": " << "true" << endl;
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sensorNode->setProperty("motion").send(String("true"));
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d.value=true;
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}else{
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Homie.getLogger() << "motion " << ": " << "false" << endl;
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sensorNode->setProperty("motion").send(String("false"));
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d.value=false;
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}
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d.lastsent=millis();
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}
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}
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}
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