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70 lines
1.5 KiB
70 lines
1.5 KiB
/*
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ESPurna
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SD18B20 MODULE
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Copyright (C) 2016 by Xose Pérez <xose dot perez at gmail dot com>
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*/
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#if ENABLE_DS18B20
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#include <OneWire.h>
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#include <DallasTemperature.h>
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OneWire oneWire(DS_PIN);
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DallasTemperature ds18b20(&oneWire);
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char dsTemperature[6];
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// -----------------------------------------------------------------------------
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// DS18B20
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// -----------------------------------------------------------------------------
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char * getDSTemperature() {
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return dsTemperature;
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}
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void dsSetup() {
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ds18b20.begin();
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}
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void dsLoop() {
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if (!mqttConnected()) return;
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// Check if we should read new data
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static unsigned long last_update = 0;
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if ((millis() - last_update > DS_UPDATE_INTERVAL) || (last_update == 0)) {
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last_update = millis();
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// Read sensor data
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ds18b20.requestTemperatures();
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double t = ds18b20.getTempCByIndex(0);
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// Check if readings are valid
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if (isnan(t)) {
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DEBUG_MSG("[DS18B20] Error reading sensor\n");
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} else {
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dtostrf(t, 4, 1, dsTemperature);
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DEBUG_MSG("[DS18B20] Temperature: %s\n", dsTemperature);
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// Send MQTT messages
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mqttSend((char *) getSetting("dsTmpTopic", DS_TEMPERATURE_TOPIC).c_str(), dsTemperature);
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// Update websocket clients
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char buffer[100];
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sprintf_P(buffer, PSTR("{\"dsVisible\": 1, \"dsTmp\": %s}"), dsTemperature);
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wsSend(buffer);
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}
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}
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}
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#endif
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