105 lines
3.0 KiB
C++
105 lines
3.0 KiB
C++
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#include "sensor_hs1101.h"
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Sensor_HS1101::Sensor_HS1101(int pin)
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{
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hs1101pin=pin;
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struct sensordata data;
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//out_humidity[] = {1000,900,800,700,600,500,400,300,200,100,0}; //*10, gets later devided by 10
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//in_hs1101frequency[] = {6033,6186,6330,6468,6600,6728,6853,6976,7100,7224,7351};
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}
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void Sensor_HS1101::init() //Things to be done during setup()
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{
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Serial.println("initializing HS1101");
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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_HS1101::setSettings(float minchange, unsigned long senddelaymax, unsigned long readdelay)
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{
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data.minchange=minchange;
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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_HS1101::advertise(HomieNode& p_sensorNode)
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{
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sensorNode = &p_sensorNode;
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#ifdef SENSOR_DHT22
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sensorNode->advertise("humidity_hs1101");
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#else
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sensorNode->advertise("humidity");
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#endif
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}
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void Sensor_HS1101::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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d.value = getHumidity_HS1101(hs1101pin); //hum %
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if (fabs(d.lastsentvalue-d.value)>=d.minchange){
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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)) {
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Serial.print("Sending HS1101. reason=");
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if (_changed) Serial.println("change"); else Serial.println("time");
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#if defined(SENSOR_DHT22)
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Homie.getLogger() << "humidity hs1101 " << ": " << d.value << endl;
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sensorNode->setProperty("humidity_hs1101").send(String(d.value));
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#else
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Homie.getLogger() << "humidity " << ": " << d.value << endl;
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sensorNode->setProperty("humidity").send(String(d.value));
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#endif
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d.lastsentvalue=d.value;
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d.lastsent=millis();
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}
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}
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}
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float Sensor_HS1101::getHumidity_HS1101(int pin) {
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#define HS1101_SAMPLES 512
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double freq = 0;
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//for(unsigned int j=0; j<SAMPLES; j++) freq+= 500000/pulseIn(pin, LOW, 1000);
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for(unsigned int j=0; j<HS1101_SAMPLES; j++) freq+= 1000000/(pulseIn(pin, HIGH, 1000)+pulseIn(pin, LOW, 1000)); //both high and low because signal has not 50% duty cycle
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freq=freq / HS1101_SAMPLES;
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if (freq>2000 && freq<10000){ //in roughly valid range
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return get_mapped(in_hs1101frequency,out_humidity,HUMARRAYSIZE, freq )/10.0;
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}else{ //error
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return -1;
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}
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}
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//quelle: https://groups.google.com/forum/#!topic/souliss/1kMAltPB2ME[1-25]
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int Sensor_HS1101::get_mapped(const unsigned int* _in, const unsigned int* _out, byte size,int val) //map with constrain
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{
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// take care the value is within range
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// val = constrain(val, _in[0], _in[size-1]);
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if (val <= _in[0]) return _out[0];
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if (val >= _in[size-1]) return _out[size-1];
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// search right interval
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byte pos = 1; // _in[0] allready tested
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while(val > _in[pos]) pos++;
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// this will handle all exact "points" in the _in array
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if (val == _in[pos]) return _out[pos];
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// interpolate in the right segment for the rest
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return map(val, _in[pos-1], _in[pos], _out[pos-1], _out[pos]);
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}
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