version 1.4.0. See ChangeLog

src/ds18.h

@@ -0,0 +1,55 @@
+/*
+ * Dallas support for external temperature sensors
+ * Copyright (C) 2017-2018 by Xose Pérez <xose dot perez at gmail dot com>
+ * 
+ * Paul Derbyshire - https://github.com/proddy/EMS-ESP
+ *
+ * See ChangeLog.md for history
+ * See README.md for Acknowledgments
+ *
+ */
+
+#pragma once
+
+#include <OneWire.h>
+#include <vector>
+
+#define DS18_CHIP_DS18S20 0x10
+#define DS18_CHIP_DS1822 0x22
+#define DS18_CHIP_DS18B20 0x28
+#define DS18_CHIP_DS1825 0x3B
+
+#define DS18_DATA_SIZE 9
+#define DS18_PARASITE 1
+#define DS18_DISCONNECTED -127
+
+#define GPIO_NONE 0x99
+#define DS18_READ_INTERVAL 2000 // Force sensor read & cache every 2 seconds
+
+#define DS18_CMD_START_CONVERSION 0x44
+#define DS18_CMD_READ_SCRATCHPAD 0xBE
+
+typedef struct {
+    uint8_t address[8];
+    uint8_t data[DS18_DATA_SIZE];
+} ds_device_t;
+
+class DS18 {
+  public:
+    DS18();
+    ~DS18();
+
+    uint8_t setup(uint8_t gpio);
+    void    loop();
+    char *  getDeviceString(char * s, unsigned char index);
+    double  getValue(unsigned char index);
+
+  protected:
+    bool          validateID(unsigned char id);
+    unsigned char chip(unsigned char index);
+    uint8_t       loadDevices();
+
+    OneWire * _wire;
+    uint8_t   _count; // # devices
+    uint8_t   _gpio;  // the sensor pin
+};