mirror of
https://github.com/RobTillaart/Arduino.git
synced 2024-09-20 17:06:16 -04:00
116 lines
3.2 KiB
C++
116 lines
3.2 KiB
C++
#pragma once
|
|
//
|
|
// FILE: AM232X.h
|
|
// AUTHOR: Rob Tillaart
|
|
// PURPOSE: AM232X Temperature and Humidity sensor library for Arduino
|
|
// VERSION: 0.4.1
|
|
// URL: https://github.com/RobTillaart/AM232X
|
|
//
|
|
// AM232X PIN layout AM2315 COLOR
|
|
// ============================================
|
|
// bottom view DESCRIPTION COLOR
|
|
// +---+
|
|
// |o | VDD RED
|
|
// |o | SDA YELLOW
|
|
// |o | GND BLACK
|
|
// |o | SCL GREY
|
|
// +---+
|
|
//
|
|
// do not forget pull up resistors between SDA, SCL and VDD.
|
|
|
|
|
|
#include "Arduino.h"
|
|
#include "Wire.h"
|
|
|
|
|
|
#define AM232X_LIB_VERSION (F("0.4.1"))
|
|
|
|
|
|
#define AM232X_OK 0
|
|
#define AM232X_ERROR_UNKNOWN -10
|
|
#define AM232X_ERROR_CONNECT -11
|
|
#define AM232X_ERROR_FUNCTION -12
|
|
#define AM232X_ERROR_ADDRESS -13
|
|
#define AM232X_ERROR_REGISTER -14
|
|
#define AM232X_ERROR_CRC_1 -15
|
|
#define AM232X_ERROR_CRC_2 -16
|
|
#define AM232X_ERROR_WRITE_DISABLED -17
|
|
#define AM232X_ERROR_WRITE_COUNT -18
|
|
#define AM232X_MISSING_BYTES -19
|
|
#define AM232X_READ_TOO_FAST -20
|
|
|
|
|
|
/*
|
|
from datasheet
|
|
0x80: not support function code
|
|
0x81: Read an illegal address
|
|
0x82: write data beyond the scope
|
|
0x83: CRC checksum error
|
|
0x84: Write disabled
|
|
*/
|
|
|
|
class AM232X
|
|
{
|
|
public:
|
|
explicit AM232X(TwoWire *wire = &Wire);
|
|
|
|
#if defined (ESP8266) || defined(ESP32)
|
|
bool begin(uint8_t sda, uint8_t scl);
|
|
#endif
|
|
bool begin();
|
|
// datasheet 8.2 - wake up is min 800 us max 3000 us
|
|
bool isConnected(uint16_t timeout = 3000);
|
|
|
|
int read();
|
|
// lastRead is in MilliSeconds since start sketch
|
|
uint32_t lastRead() { return _lastRead; };
|
|
// set readDelay to 0 will reset to datasheet values
|
|
uint16_t getReadDelay() { return _readDelay; };
|
|
void setReadDelay(uint16_t rd = 0) { _readDelay = rd; };
|
|
|
|
int getModel();
|
|
int getVersion();
|
|
uint32_t getDeviceID();
|
|
|
|
int getStatus();
|
|
int getUserRegisterA();
|
|
int getUserRegisterB();
|
|
|
|
int setStatus(uint8_t value);
|
|
int setUserRegisterA(int value);
|
|
int setUserRegisterB(int value);
|
|
|
|
float getHumidity();
|
|
float getTemperature();
|
|
|
|
// adding offsets works well in normal range
|
|
// might introduce under- or overflow at the ends of the sensor range
|
|
void setHumOffset(float offset) { _humOffset = offset; };
|
|
void setTempOffset(float offset) { _tempOffset = offset; };
|
|
float getHumOffset() { return _humOffset; };
|
|
float getTempOffset() { return _tempOffset; };
|
|
|
|
bool wakeUp() { return isConnected(); };
|
|
|
|
private:
|
|
uint8_t _bits[8];
|
|
float _humidity;
|
|
float _temperature;
|
|
float _humOffset;
|
|
float _tempOffset;
|
|
uint32_t _lastRead;
|
|
uint16_t _readDelay;
|
|
|
|
int _readRegister(uint8_t reg, uint8_t cnt);
|
|
int _writeRegister(uint8_t reg, uint8_t cnt, int16_t value);
|
|
int _getData(uint8_t length);
|
|
|
|
uint16_t _crc16(uint8_t *ptr, uint8_t len);
|
|
|
|
TwoWire* _wire;
|
|
};
|
|
|
|
|
|
// -- END OF FILE --
|
|
|