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145 lines
3.8 KiB
145 lines
3.8 KiB
/*
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DS18B20 MODULE
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Copyright (C) 2016-2017 by Xose Pérez <xose dot perez at gmail dot com>
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*/
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#if DS18B20_SUPPORT
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#include <OneWire.h>
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#include <DallasTemperature.h>
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OneWire oneWire(DS18B20_PIN);
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DallasTemperature ds18b20(&oneWire);
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bool _dsIsConnected = false;
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double _dsTemperature = 0;
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// -----------------------------------------------------------------------------
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// Private
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// -----------------------------------------------------------------------------
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void _dsWebSocketOnSend(JsonObject& root) {
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root["dsVisible"] = 1;
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root["dsConnected"] = getDSIsConnected();
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if (getDSIsConnected()) {
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root["dsTmp"] = getDSTemperature();
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}
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root["tmpUnits"] = getSetting("tmpUnits", TMP_UNITS).toInt();
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}
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// -----------------------------------------------------------------------------
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// DS18B20
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// -----------------------------------------------------------------------------
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bool getDSIsConnected() {
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return _dsIsConnected;
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}
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double getDSTemperature(bool celsius) {
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double value = celsius ? _dsTemperature : _dsTemperature * 1.8 + 32;
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double correction = getSetting("tmpCorrection", TEMPERATURE_CORRECTION).toFloat();
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return roundTo(value + correction, TEMPERATURE_DECIMALS);
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}
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double getDSTemperature() {
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bool celsius = getSetting("tmpUnits", TMP_UNITS).toInt() == TMP_CELSIUS;
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return getDSTemperature(celsius);
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}
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void dsSetup() {
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#if DS18B20_PULLUP
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pinMode(DS18B20_PIN, INPUT_PULLUP);
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#endif
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ds18b20.begin();
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ds18b20.setWaitForConversion(false);
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#if WEB_SUPPORT
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wsOnSendRegister(_dsWebSocketOnSend);
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apiRegister(DS18B20_TEMPERATURE_TOPIC, DS18B20_TEMPERATURE_TOPIC, [](char * buffer, size_t len) {
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dtostrf(getDSTemperature(), 1-len, 1, buffer);
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});
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#endif
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}
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void dsLoop() {
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static unsigned long last_update = 0;
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static double last_temperature = 0.0;
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static bool requested = false;
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if ((millis() - last_update > DS18B20_UPDATE_INTERVAL) || (last_update == 0)) {
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if (!requested) {
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ds18b20.requestTemperatures();
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requested = true;
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// Requesting takes time, so data will probably not be available in this round
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return;
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}
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// Check if requested data is already available
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if (!ds18b20.isConversionComplete()) return;
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requested = false;
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last_update = millis();
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// Read sensor data
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double t = ds18b20.getTempCByIndex(0);
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// Check returned value
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if (t == DEVICE_DISCONNECTED_C) {
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_dsIsConnected = false;
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DEBUG_MSG_P(PSTR("[DS18B20] Not connected\n"));
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return;
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} else {
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_dsIsConnected = true;
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}
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// Save & convert
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_dsTemperature = t;
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bool celsius = getSetting("tmpUnits", TMP_UNITS).toInt() == TMP_CELSIUS;
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t = getDSTemperature(celsius);
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// Build string
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char temperature[6];
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dtostrf(getDSTemperature(celsius), 1-sizeof(temperature), 1, temperature);
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// Debug
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DEBUG_MSG_P(PSTR("[DS18B20] Temperature: %s%s\n"), temperature, celsius ? "ºC" : "ºF");
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// If the new temperature is different from the last
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if (fabs(_dsTemperature - last_temperature) >= TEMPERATURE_MIN_CHANGE) {
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last_temperature = _dsTemperature;
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// Send MQTT messages
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mqttSend(getSetting("dsTmpTopic", DS18B20_TEMPERATURE_TOPIC).c_str(), temperature);
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// Send to Domoticz
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#if DOMOTICZ_SUPPORT
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domoticzSend("dczTmpIdx", 0, temperature);
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#endif
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#if INFLUXDB_SUPPORT
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idbSend(getSetting("dsTmpTopic", DS18B20_TEMPERATURE_TOPIC).c_str(), temperature);
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#endif
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}
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// Update websocket clients
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#if WEB_SUPPORT
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wsSend(_dsWebSocketOnSend);
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#endif
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}
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}
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#endif
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