47 lines
946 B
C++
47 lines
946 B
C++
#include "GwSHT3X.h"
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#ifdef _GWSHT3X
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bool SHT3X::init(uint8_t slave_addr_in, TwoWire* wire_in)
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{
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_wire = wire_in;
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_address=slave_addr_in;
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return true;
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}
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byte SHT3X::get()
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{
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unsigned int data[6];
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// Start I2C Transmission
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_wire->beginTransmission(_address);
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// Send measurement command
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_wire->write(0x2C);
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_wire->write(0x06);
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// Stop I2C transmission
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if (_wire->endTransmission()!=0)
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return 1;
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delay(200);
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// Request 6 bytes of data
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_wire->requestFrom(_address, (uint8_t) 6);
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// Read 6 bytes of data
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// cTemp msb, cTemp lsb, cTemp crc, humidity msb, humidity lsb, humidity crc
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for (int i=0;i<6;i++) {
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data[i]=_wire->read();
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};
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delay(50);
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if (_wire->available()!=0)
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return 2;
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// Convert the data
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cTemp = ((((data[0] * 256.0) + data[1]) * 175) / 65535.0) - 45;
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fTemp = (cTemp * 1.8) + 32;
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humidity = ((((data[3] * 256.0) + data[4]) * 100) / 65535.0);
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return 0;
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}
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#endif |