first commit

ESP8266_ONEWIRE_SCAN/ESP8266_ONEWIRE_SCAN.ino

@@ -0,0 +1,71 @@
+/*
+ * One Wire scanner
+ * Testé sur la carte ESP32 Wemos LoLin32 Lite | Checked on Wemos LoLin32 Lite development board
+ * Code inspiré de l'exemple livré avec la librairie Arduino DallasTemperature 
+ * Code inspired by DallasTemperature Aduino library from
+ * http://milesburton.com/Dallas_Temperature_Control_Library
+ */
+#include <OneWire.h>
+// Bus OneWie connecté sur la broche 4 | OneWire bus connected on Pin 4
+// Installer une résistance de 4.7K entre le +5V et le cable de données
+// A 4.7K resistor is necessary between +5V and Data wire  
+OneWire  ds(4);  
+
+byte i;
+byte type_s;
+byte data[12];
+byte addr[8];
+  
+void OneWireScanner(){
+  if ( !ds.search(addr)) {
+    Serial.println("No more addresses.");
+    Serial.println();
+    ds.reset_search();
+    return;
+  }
+  
+  Serial.print("ROM = ");
+  for( i = 0; i < 8; i++) {
+    Serial.write(' ');
+    Serial.print("0x");
+    Serial.print(addr[i], HEX);
+    if ( i != 7 ) {
+      Serial.print(", ");
+    }
+  }
+  
+  if (OneWire::crc8(addr, 7) != addr[7]) {
+      Serial.println("CRC is not valid!");
+      return;
+  }
+  Serial.println();
+ 
+  // the first ROM byte indicates which chip
+  switch (addr[0]) {
+    case 0x10:
+      Serial.println("  Chip = DS18S20");  // or old DS1820
+      type_s = 1;
+      break;
+    case 0x28:
+      Serial.println("  Chip = DS18B20");
+      type_s = 0;
+      break;
+    case 0x22:
+      Serial.println("  Chip = DS1822");
+      type_s = 0;
+      break;
+    default:
+      Serial.println("Device is not a DS18x20 family device.");
+      return;
+  } 
+}
+
+void setup() {
+   Serial.begin(9600);
+}
+
+void loop() {
+  // put your main code here, to run repeatedly:
+  OneWireScanner();
+  delay(5000);
+}