mirror of
https://github.com/emsesp/EMS-ESP32.git
synced 2025-12-08 00:39:50 +03:00
56 lines
1.2 KiB
C++
56 lines
1.2 KiB
C++
/*
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* Dallas support for external temperature sensors
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* Copyright (C) 2017-2018 by Xose Pérez <xose dot perez at gmail dot com>
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*
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* Paul Derbyshire - https://github.com/proddy/EMS-ESP
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*
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* See ChangeLog.md for history
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* See README.md for Acknowledgments
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*
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*/
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#pragma once
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#include <OneWire.h>
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#include <vector>
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#define DS18_CHIP_DS18S20 0x10
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#define DS18_CHIP_DS1822 0x22
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#define DS18_CHIP_DS18B20 0x28
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#define DS18_CHIP_DS1825 0x3B
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#define DS18_DATA_SIZE 9
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#define DS18_PARASITE 1
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#define DS18_DISCONNECTED -127
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#define GPIO_NONE 0x99
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#define DS18_READ_INTERVAL 2000 // Force sensor read & cache every 2 seconds
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#define DS18_CMD_START_CONVERSION 0x44
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#define DS18_CMD_READ_SCRATCHPAD 0xBE
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typedef struct {
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uint8_t address[8];
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uint8_t data[DS18_DATA_SIZE];
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} ds_device_t;
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class DS18 {
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public:
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DS18();
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~DS18();
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uint8_t setup(uint8_t gpio);
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void loop();
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char * getDeviceString(char * s, unsigned char index);
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double getValue(unsigned char index);
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protected:
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bool validateID(unsigned char id);
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unsigned char chip(unsigned char index);
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uint8_t loadDevices();
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OneWire * _wire;
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uint8_t _count; // # devices
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uint8_t _gpio; // the sensor pin
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};
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