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--- en:iot-open:practical:hardware:rtu:esp32:scenarios:ds18b20 [2025/07/30 15:46] – created kivilands6
+++ en:iot-open:practical:hardware:rtu:esp32:scenarios:ds18b20 [2025/07/30 15:47] (current) – [Prequisits] kivilands6
@@ Line 1: / Line 1: @@
+====== ESP32 DS18B20 =====
+This is an example of the ds18b20 running and showcasing temperature using the 16x2 lcd.
+===== Prequisits ====
+Platform.ini
+<code>
+lib_deps = adafruit/Adafruit LiquidCrystal@^2.0.2
+  milesburton/DallasTemperature@^3.11.0
+</code>
+===== Example ====
+<code>
+#include <Arduino.h>
+#include <Adafruit_LiquidCrystal.h>
+#include <DallasTemperature.h>
+/* DS18B20 */
+#define ONE_WIRE_BUS 14
+OneWire oneWire(ONE_WIRE_BUS);
+DallasTemperature sensors(&oneWire);
+#define LCD_RS 48
+#define LCD_ENABLE 47
+#define LCD_D4 34
+#define LCD_D5 33
+#define LCD_D6 26
+#define LCD_D7 21
+static Adafruit_LiquidCrystal lcd(LCD_RS, LCD_ENABLE, LCD_D4, LCD_D5, LCD_D6, LCD_D7);
+void setup() {
+  if (!lcd.begin(16, 2)) {
+    Serial.println("Could not init LCD");
+    while(1);
+  }
+  Serial.println("LCD ready.");
+  // Print a message to the LCD.
+  lcd.print("IOT-OPEN");
+  /* ds18b20 setup */
+  sensors.begin();
+}
+void loop() {
+  sensors.requestTemperatures();
+  lcd.setCursor(0, 1);
+  // print the number of seconds since reset:
+  lcd.print(sensors.getTempCByIndex(0));
+  delay(1000);
+}
+</code>