mirror of
https://github.com/RobTillaart/Arduino.git
synced 2024-10-03 18:09:02 -04:00
96 lines
1.9 KiB
C++
96 lines
1.9 KiB
C++
//
|
|
// FILE: SHT31_SW.cpp
|
|
// AUTHOR: Rob Tillaart
|
|
// VERSION: 0.1.2
|
|
// DATE: 2019-02-08 (base SHT31 lib)
|
|
// PURPOSE: Arduino library for the SHT31 temperature and humidity sensor
|
|
// to be used with the SoftWire library instead of (hardware) Wire.
|
|
// derives from SHT31 0.3.8
|
|
// URL: https://www.adafruit.com/product/2857
|
|
// https://github.com/RobTillaart/SHT31_SW
|
|
// https://github.com/RobTillaart/SHT31
|
|
|
|
|
|
#include "SHT31_SW.h"
|
|
|
|
|
|
SHT31_SW::SHT31_SW()
|
|
{
|
|
_softWire = NULL;
|
|
_address = 0;
|
|
_lastRead = 0;
|
|
_rawTemperature = 0;
|
|
_rawHumidity = 0;
|
|
_heatTimeout = 0;
|
|
_heaterStart = 0;
|
|
_heaterStop = 0;
|
|
_heaterOn = false;
|
|
_error = SHT31_OK;
|
|
}
|
|
|
|
|
|
bool SHT31_SW::begin(const uint8_t address, SoftWire *softWire)
|
|
{
|
|
if ((address != 0x44) && (address != 0x45))
|
|
{
|
|
return false;
|
|
}
|
|
_address = address;
|
|
_softWire = softWire;
|
|
_softWire->begin();
|
|
return reset();
|
|
}
|
|
|
|
|
|
bool SHT31_SW::begin(SoftWire *softWire)
|
|
{
|
|
return begin(SHT_DEFAULT_ADDRESS, softWire);
|
|
}
|
|
|
|
|
|
bool SHT31_SW::isConnected()
|
|
{
|
|
_softWire->beginTransmission(_address);
|
|
int rv = _softWire->endTransmission();
|
|
if (rv != 0) _error = SHT31_ERR_NOT_CONNECT;
|
|
return (rv == 0);
|
|
}
|
|
|
|
|
|
////////////////////////////////////////////////////
|
|
//
|
|
// PRIVATE
|
|
//
|
|
bool SHT31_SW::writeCmd(uint16_t cmd)
|
|
{
|
|
_softWire->beginTransmission(_address);
|
|
_softWire->write(cmd >> 8);
|
|
_softWire->write(cmd & 0xFF);
|
|
if (_softWire->endTransmission() != 0)
|
|
{
|
|
_error = SHT31_ERR_WRITECMD;
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
|
|
bool SHT31_SW::readBytes(uint8_t n, uint8_t *val)
|
|
{
|
|
int rv = _softWire->requestFrom(_address, (uint8_t) n);
|
|
if (rv == n)
|
|
{
|
|
for (uint8_t i = 0; i < n; i++)
|
|
{
|
|
val[i] = _softWire->read();
|
|
}
|
|
return true;
|
|
}
|
|
_error = SHT31_ERR_READBYTES;
|
|
return false;
|
|
}
|
|
|
|
|
|
// -- END OF FILE --
|
|
|