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Accepting the Si7021 sensor in the begin as programmatically compatible with HTU21D #16

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Accepting the Si7021 sensor in the begin as programmatically compatible with HTU21D #16

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5 changes: 4 additions & 1 deletion Adafruit_HTU21DF.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -46,7 +46,10 @@ boolean Adafruit_HTU21DF::begin(void)
Wire.write(HTU21DF_READREG);
Wire.endTransmission();
Wire.requestFrom(HTU21DF_I2CADDR, 1);
return (Wire.read() == 0x2); // after reset should be 0x2
uint8_t result = Wire.read();
// after reset the result should be 0x2 for HTU21DF
// or 0x3A for Si7021, which is compatible for temp and humidity readings
return (result == 0x2) || (result == 0x3A);
}

/**
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