mirror of
https://github.com/RobTillaart/Arduino.git
synced 2024-10-03 18:09:02 -04:00
161 lines
3.7 KiB
C++
161 lines
3.7 KiB
C++
#pragma once
|
|
//
|
|
// FILE: SHT85.h
|
|
// AUTHOR: Rob Tillaart
|
|
// VERSION: 0.3.1
|
|
// DATE: 2021-02-10
|
|
// PURPOSE: Arduino library for the SHT85 temperature and humidity sensor
|
|
// https://nl.rs-online.com/web/p/temperature-humidity-sensor-ics/1826530
|
|
// URL: https://github.com/RobTillaart/SHT85
|
|
//
|
|
// keep lib in sync with https://github.com/RobTillaart/SHT31
|
|
//
|
|
// TOPVIEW SHT85
|
|
// +-------+
|
|
// +-----\ | SDA 4 -----
|
|
// | +-+ ----+ GND 3 -----
|
|
// | +-+ ----+ +5V 2 -----
|
|
// +-----/ | SCL 1 -----
|
|
// +-------+
|
|
|
|
|
|
#include "Arduino.h"
|
|
#include "Wire.h"
|
|
|
|
|
|
#define SHT_LIB_VERSION (F("0.3.1"))
|
|
#define SHT85_LIB_VERSION SHT_LIB_VERSION
|
|
|
|
|
|
// fields readStatus
|
|
#define SHT_STATUS_ALERT_PENDING (1 << 15)
|
|
#define SHT_STATUS_HEATER_ON (1 << 13)
|
|
#define SHT_STATUS_HUM_TRACK_ALERT (1 << 11)
|
|
#define SHT_STATUS_TEMP_TRACK_ALERT (1 << 10)
|
|
#define SHT_STATUS_SYSTEM_RESET (1 << 4)
|
|
#define SHT_STATUS_COMMAND_STATUS (1 << 1)
|
|
#define SHT_STATUS_WRITE_CRC_STATUS (1 << 0)
|
|
|
|
// error codes
|
|
#define SHT_OK 0x00
|
|
#define SHT_ERR_WRITECMD 0x81
|
|
#define SHT_ERR_READBYTES 0x82
|
|
#define SHT_ERR_HEATER_OFF 0x83
|
|
#define SHT_ERR_NOT_CONNECT 0x84
|
|
#define SHT_ERR_CRC_TEMP 0x85
|
|
#define SHT_ERR_CRC_HUM 0x86
|
|
#define SHT_ERR_CRC_STATUS 0x87
|
|
#define SHT_ERR_HEATER_COOLDOWN 0x88
|
|
#define SHT_ERR_HEATER_ON 0x89
|
|
|
|
|
|
class SHT
|
|
{
|
|
public:
|
|
SHT();
|
|
|
|
#if defined(ESP8266) || defined(ESP32)
|
|
bool begin(const uint8_t address, uint8_t dataPin, uint8_t clockPin);
|
|
#endif
|
|
bool begin(const uint8_t address, TwoWire *wire = &Wire);
|
|
|
|
uint8_t getType() { return _type; };
|
|
|
|
// blocks 15 milliseconds + actual read + math
|
|
bool read(bool fast = true);
|
|
|
|
// check sensor is reachable over I2C
|
|
bool isConnected();
|
|
|
|
// details see datasheet; summary in SHT31.cpp file
|
|
uint16_t readStatus();
|
|
|
|
// lastRead is in milliSeconds since start
|
|
uint32_t lastRead() { return _lastRead; };
|
|
|
|
bool reset(bool hard = false);
|
|
|
|
|
|
// do not use heater for long periods,
|
|
// use it for max 3 minutes to heat up
|
|
// and let it cool down at least 3 minutes.
|
|
void setHeatTimeout(uint8_t seconds);
|
|
uint8_t getHeatTimeout() { return _heatTimeout; };
|
|
bool heatOn();
|
|
bool heatOff();
|
|
bool isHeaterOn(); // is the sensor still heating up?
|
|
|
|
|
|
float getHumidity() { return _rawHumidity * (100.0 / 65535); };
|
|
float getTemperature() { return _rawTemperature * (175.0 / 65535) - 45; };
|
|
float getFahrenheit() { return _rawTemperature * (63.0 /13107.0) - 49; };
|
|
uint16_t getRawHumidity() { return _rawHumidity; };
|
|
uint16_t getRawTemperature() { return _rawTemperature; };
|
|
|
|
|
|
// ASYNC INTERFACE
|
|
bool requestData();
|
|
bool dataReady();
|
|
bool readData(bool fast = true);
|
|
|
|
int getError(); // clears error flag
|
|
|
|
|
|
protected:
|
|
uint8_t crc8(const uint8_t *data, uint8_t len);
|
|
bool writeCmd(uint16_t cmd);
|
|
bool readBytes(uint8_t n, uint8_t *val);
|
|
TwoWire* _wire;
|
|
|
|
uint8_t _address;
|
|
uint8_t _heatTimeout; // seconds
|
|
uint32_t _lastRead;
|
|
uint32_t _lastRequest; // for async interface
|
|
uint32_t _heaterStart;
|
|
uint32_t _heaterStop;
|
|
bool _heaterOn;
|
|
uint8_t _type;
|
|
|
|
uint16_t _rawHumidity;
|
|
uint16_t _rawTemperature;
|
|
|
|
uint8_t _error;
|
|
};
|
|
|
|
|
|
|
|
////////////////////////////////////////////////////////
|
|
//
|
|
// DERIVED
|
|
//
|
|
class SHT30 : public SHT
|
|
{
|
|
public:
|
|
SHT30();
|
|
};
|
|
|
|
|
|
class SHT31 : public SHT
|
|
{
|
|
public:
|
|
SHT31();
|
|
};
|
|
|
|
|
|
class SHT35 : public SHT
|
|
{
|
|
public:
|
|
SHT35();
|
|
};
|
|
|
|
|
|
class SHT85 : public SHT
|
|
{
|
|
public:
|
|
SHT85();
|
|
};
|
|
|
|
|
|
// -- END OF FILE --
|
|
|