mirror of
https://github.com/RobTillaart/Arduino.git
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95 lines
2.1 KiB
C++
95 lines
2.1 KiB
C++
#pragma once
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//
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// FILE: AM232X.h
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// AUTHOR: Rob Tillaart
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// PURPOSE: AM232X library for Arduino
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// VERSION: 0.3.3
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// HISTORY: See AM232X.cpp
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// URL: https://github.com/RobTillaart/AM232X
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//
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// Bottom view
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// +---+
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// VDD |o |
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// SDA |o |
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// GND |o |
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// SCL |o |
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// +---+
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#include "Arduino.h"
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#include "Wire.h"
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#define AM232X_LIB_VERSION (F("0.3.3"))
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#define AM232X_OK 0
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#define AM232X_ERROR_UNKNOWN -10
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#define AM232X_ERROR_CONNECT -11
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#define AM232X_ERROR_FUNCTION -12
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#define AM232X_ERROR_ADDRESS -13
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#define AM232X_ERROR_REGISTER -14
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#define AM232X_ERROR_CRC_1 -15
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#define AM232X_ERROR_CRC_2 -16
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#define AM232X_ERROR_WRITE_DISABLED -17
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#define AM232X_ERROR_WRITE_COUNT -18
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#define AM232X_MISSING_BYTES -19
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/*
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from datasheet
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0x80: not support function code
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0x81: Read an illegal address
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0x82: write data beyond the scope
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0x83: CRC checksum error
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0x84: Write disabled
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*/
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class AM232X
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{
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public:
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explicit AM232X(TwoWire *wire = &Wire);
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#if defined (ESP8266) || defined(ESP32)
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bool begin(uint8_t sda, uint8_t scl);
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#endif
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bool begin();
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// datasheet 8.2 - wake up is min 800 us max 3000 us
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bool isConnected(uint16_t timeout = 3000);
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int read();
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int getModel();
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int getVersion();
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uint32_t getDeviceID();
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int getStatus();
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int getUserRegisterA();
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int getUserRegisterB();
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int setStatus(uint8_t value);
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int setUserRegisterA(int value);
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int setUserRegisterB(int value);
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inline float getHumidity() { return humidity; };
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inline float getTemperature() { return temperature; };
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bool wakeUp() { return isConnected(); };
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private:
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uint8_t bits[8];
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float humidity;
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float temperature;
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int _readRegister(uint8_t reg, uint8_t cnt);
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int _writeRegister(uint8_t reg, uint8_t cnt, int16_t value);
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int _getData(uint8_t length);
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uint16_t _crc16(uint8_t *ptr, uint8_t len);
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TwoWire* _wire;
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};
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// -- END OF FILE --
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