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dallas.ino

@@ -0,0 +1,65 @@
+#include <OneWire.h>
+#include <DallasTemperature.h>
+
+#define ONE_WIRE_BUS 8   // Pin, kde je připojen DS18B20
+
+OneWire oneWire(ONE_WIRE_BUS);
+DallasTemperature sensors(&oneWire);
+
+DeviceAddress sensorAddress;
+bool sensorFound = false;
+
+void printAddress(DeviceAddress deviceAddress) {
+  for (uint8_t i = 0; i < 8; i++) {
+    if (deviceAddress[i] < 16) Serial.print("0");
+    Serial.print(deviceAddress[i], HEX);
+  }
+}
+
+void setup() {
+  pinMode(8, INPUT_PULLUP);
+  Serial.begin(115200);
+  delay(2000);
+
+  Serial.println("Hledám DS18B20...");
+
+  sensors.begin();
+
+  if (sensors.getDeviceCount() == 0) {
+    Serial.println("Žádné čidlo nenalezeno!");
+    return;
+  }
+
+  if (sensors.getAddress(sensorAddress, 0)) {
+    sensorFound = true;
+    Serial.print("Čidlo nalezeno, adresa: ");
+    printAddress(sensorAddress);
+    Serial.println();
+
+    sensors.setResolution(sensorAddress, 12); // 9–12 bitů
+  } else {
+    Serial.println("Nepodařilo se získat adresu čidla.");
+  }
+}
+
+void loop() {
+
+  if (!sensorFound) {
+    delay(2000);
+    return;
+  }
+
+  sensors.requestTemperatures();
+
+  float temperature = sensors.getTempC(sensorAddress);
+
+  if (temperature == DEVICE_DISCONNECTED_C) {
+    Serial.println("Čidlo odpojeno!");
+  } else {
+    Serial.print("Teplota: ");
+    Serial.print(temperature);
+    Serial.println(" °C");
+  }
+
+  delay(2000);
+}