Fork of the espurna firmware for `mhsw` switches
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/*
DHT MODULE
Copyright (C) 2016-2017 by Xose Pérez <xose dot perez at gmail dot com>
*/
#if ENABLE_DHT
#include <DHT.h>
#include <Adafruit_Sensor.h>
DHT dht(DHT_PIN, DHT_TYPE, DHT_TIMING);
double _dhtTemperature = 0;
unsigned int _dhtHumidity = 0;
// -----------------------------------------------------------------------------
// Values
// -----------------------------------------------------------------------------
double getDHTTemperature() {
return _dhtTemperature;
}
unsigned int getDHTHumidity() {
return _dhtHumidity;
}
void dhtSetup() {
dht.begin();
apiRegister(DHT_TEMPERATURE_TOPIC, DHT_TEMPERATURE_TOPIC, [](char * buffer, size_t len) {
dtostrf(_dhtTemperature, len-1, 1, buffer);
});
apiRegister(DHT_HUMIDITY_TOPIC, DHT_HUMIDITY_TOPIC, [](char * buffer, size_t len) {
snprintf(buffer, len, "%d", _dhtHumidity);
});
}
void dhtLoop() {
// Check if we should read new data
static unsigned long last_update = 0;
if ((millis() - last_update > DHT_UPDATE_INTERVAL) || (last_update == 0)) {
last_update = millis();
unsigned char tmpUnits = getSetting("tmpUnits", TMP_UNITS).toInt();
// Read sensor data
double h = dht.readHumidity();
double t = dht.readTemperature(tmpUnits == TMP_FAHRENHEIT);
// Check if readings are valid
if (isnan(h) || isnan(t)) {
DEBUG_MSG_P(PSTR("[DHT] Error reading sensor\n"));
} else {
_dhtTemperature = t;
_dhtHumidity = h;
char temperature[6];
char humidity[6];
dtostrf(t, 4, 1, temperature);
itoa((unsigned int) h, humidity, 10);
DEBUG_MSG_P(PSTR("[DHT] Temperature: %s%s\n"), temperature, (tmpUnits == TMP_CELSIUS) ? "ºC" : "ºF");
DEBUG_MSG_P(PSTR("[DHT] Humidity: %s\n"), humidity);
// Send MQTT messages
mqttSend(getSetting("dhtTmpTopic", DHT_TEMPERATURE_TOPIC).c_str(), temperature);
mqttSend(getSetting("dhtHumTopic", DHT_HUMIDITY_TOPIC).c_str(), humidity);
// Send to Domoticz
#if ENABLE_DOMOTICZ
{
domoticzSend("dczTmpIdx", 0, temperature);
int status;
if (h > 70) {
status = HUMIDITY_WET;
} else if (h > 45) {
status = HUMIDITY_COMFORTABLE;
} else if (h > 30) {
status = HUMIDITY_NORMAL;
} else {
status = HUMIDITY_DRY;
}
char buffer[2];
sprintf(buffer, "%d", status);
domoticzSend("dczHumIdx", humidity, buffer);
}
#endif
#if ENABLE_INFLUXDB
influxDBSend(getSetting("dhtTmpTopic", DHT_TEMPERATURE_TOPIC).c_str(), temperature);
influxDBSend(getSetting("dhtHumTopic", DHT_HUMIDITY_TOPIC).c_str(), humidity);
#endif
// Update websocket clients
char buffer[100];
sprintf_P(buffer, PSTR("{\"dhtVisible\": 1, \"dhtTmp\": %s, \"dhtHum\": %s, \"tmpUnits\": %d}"), temperature, humidity, tmpUnits);
wsSend(buffer);
}
}
}
#endif