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Update AHT10.cpp
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enjoyneering
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102
src/AHT10.cpp
102
src/AHT10.cpp
@ -38,9 +38,10 @@
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Constructor
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*/
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/**************************************************************************/
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AHT10::AHT10(uint8_t address)
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AHT10::AHT10(uint8_t address, ASAIR_I2C_SENSOR sensorName)
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{
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_address = address;
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_address = address;
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_sensorName = sensorName;
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}
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/**************************************************************************/
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@ -72,8 +73,11 @@ bool AHT10::begin(void)
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Wire.setClock(100000); //experimental! AVR I2C bus speed: 31kHz..400kHz/31000..400000, default 100000
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#endif
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/* sensor initialization, load factory calibration coeff */
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return enableFactoryCalCoeff();
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delay(AHT10_POWER_ON_DELAY); //wait for sensor to initialize
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setNormalMode(); //one measurement+sleep mode
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return enableFactoryCalCoeff(); //load factory calibration coeff
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}
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@ -88,29 +92,34 @@ uint8_t AHT10::readRawData()
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{
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/* send measurment command */
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Wire.beginTransmission(_address);
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#if ARDUINO >= 100
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Wire.write(AHT10_START_MEASURMENT_CMD); //send measurment command
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#if (ARDUINO) >= 100
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Wire.write(AHT10_START_MEASURMENT_CMD); //send measurment command
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Wire.write(AHT10_DATA_MEASURMENT_CMD); //send measurment parameter
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Wire.write(AHT10_DATA_NOP); //send measurment parameter
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#else
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Wire.send(AHT10_START_MEASURMENT_CMD);
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Wire.send(AHT10_DATA_MEASURMENT_CMD);
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Wire.send(AHT10_DATA_NOP);
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#endif
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if (Wire.endTransmission(true) != 0) return AHT10_ERROR; //error handler, collision on I2C bus
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if (Wire.endTransmission(true) != 0) return AHT10_ERROR; //error handler, collision on I2C bus
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if (getBusyBit() != 0x00) delay(AHT10_MEASURMENT_DELAY); //measurement delay
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if (getCalibrationBit() != 0x01) return AHT10_ERROR; //error handler, calibration coefficient turned off
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if (getBusyBit(AHT10_USE_READ_DATA) != 0x00) delay(AHT10_MEASURMENT_DELAY); //measurement delay
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/* read 6-bytes from sensor */
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#if defined(_VARIANT_ARDUINO_STM32_)
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Wire.requestFrom(_address, 6);
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#else
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Wire.requestFrom(_address, 6, true); //true - send stop after transmission & release I2C bus
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Wire.requestFrom(_address, 6, true); //true - send stop after transmission & release I2C bus
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#endif
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if (Wire.available() != 6)
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{
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_rawDataBuffer[0] = AHT10_ERROR; //for condition when AHT10_USE_READ_DATA is used
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return AHT10_ERROR; //check rxBuffer & error handler, collision on the i2c bus
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_rawDataBuffer[0] = AHT10_ERROR; //for condition when AHT10_USE_READ_DATA is used
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return AHT10_ERROR; //check rxBuffer & error handler, collision on the i2c bus
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}
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/* read 6 bytes from "wire.h" rxBuffer */
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#if ARDUINO >= 100
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#if (ARDUINO) >= 100
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for (uint8_t i = 0; i < 6 ; i++)
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{
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_rawDataBuffer[i] = Wire.read();
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@ -149,7 +158,7 @@ float AHT10::readTemperature(bool readI2C)
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uint32_t temperature = ((uint32_t)(_rawDataBuffer[3] & 0x0F) << 16) | ((uint16_t)_rawDataBuffer[4] << 8) | _rawDataBuffer[5]; //20-bit raw temperature data
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return (float)temperature * 200 / 1048576 - 50;
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return (float)temperature * 0.000191 - 50;
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}
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@ -160,7 +169,7 @@ float AHT10::readTemperature(bool readI2C)
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Read relative humidity, %
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NOTE:
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- Prolonged exposure for 60 hours at humidity > 80% can lead to a
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- prolonged exposure for 60 hours at humidity > 80% can lead to a
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temporary drift of the signal +3%. Sensor slowly returns to the
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calibrated state at normal operating conditions.
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- relative humidity range 0%..100%
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@ -179,7 +188,7 @@ float AHT10::readHumidity(bool readI2C)
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uint32_t rawData = (((uint32_t)_rawDataBuffer[1] << 16) | ((uint16_t)_rawDataBuffer[2] << 8) | (_rawDataBuffer[3])) >> 4; //20-bit raw humidity data
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float humidity = (float)rawData * 100 / 1048576;
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float humidity = (float)rawData * 0.000095;
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if (humidity < 0) return 0;
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if (humidity > 100) return 100;
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@ -202,7 +211,7 @@ bool AHT10::softReset(void)
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{
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Wire.beginTransmission(_address);
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#if ARDUINO >= 100
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#if (ARDUINO) >= 100
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Wire.write(AHT10_SOFT_RESET_CMD);
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#else
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Wire.send(AHT10_SOFT_RESET_CMD);
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@ -212,6 +221,8 @@ bool AHT10::softReset(void)
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delay(AHT10_SOFT_RESET_DELAY);
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setNormalMode(); //reinitialize sensor registers after reset
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return enableFactoryCalCoeff(); //reinitialize sensor registers after reset
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}
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@ -223,25 +234,27 @@ bool AHT10::softReset(void)
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Set normal measurment mode
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NOTE:
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- one measurement & power down
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- one measurement & power down??? no info in datasheet!!!
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*/
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/**************************************************************************/
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bool AHT10::setNormalMode(void)
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{
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Wire.beginTransmission(_address);
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#if ARDUINO >= 100
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Wire.write(AHT10_INIT_CMD); //set command mode
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Wire.write(AHT10_INIT_CAL_ENABLE); //x,0,0,x,0,x,x,x
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#if (ARDUINO) >= 100
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Wire.write(AHT10_NORMAL_CMD);
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Wire.write(AHT10_DATA_NOP);
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Wire.write(AHT10_DATA_NOP);
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#else
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Wire.send(AHT10_INIT_CMD);
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Wire.send(AHT10_INIT_CAL_ENABLE);
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Wire.send(AHT10_NORMAL_CMD);
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Wire.send(AHT10_DATA_NOP);
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Wire.send(AHT10_DATA_NOP);
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#endif
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if (Wire.endTransmission(true) != 0) return false; //safety check, make sure transmission complete
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delay(AHT10_COMMAND_DELAY);
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delay(AHT10_CMD_DELAY);
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return true;
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}
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@ -260,19 +273,20 @@ bool AHT10::setCycleMode(void)
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{
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Wire.beginTransmission(_address);
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#if ARDUINO >= 100
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Wire.write(AHT10_INIT_CMD); //set command mode
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Wire.write(AHT10_INIT_CYCLE_MODE | AHT10_INIT_CAL_ENABLE); //x,0,1,x,0,x,x,x
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#if (ARDUINO) >= 100
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if (_sensorName != AHT20_SENSOR) Wire.write(AHT10_INIT_CMD); //set command mode
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else Wire.write(AHT20_INIT_CMD);
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Wire.write(AHT10_INIT_CYCLE_MODE | AHT10_INIT_CAL_ENABLE); //0,[0,1],0,[1],0,0,0
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Wire.write(AHT10_DATA_NOP);
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#else
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Wire.send(AHT10_INIT_CMD);
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if (_sensorName != AHT20_SENSOR) Wire.send(AHT10_INIT_CMD);
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else Wire.send(AHT20_INIT_CMD);
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Wire.send(AHT10_INIT_CYCLE_MODE | AHT10_INIT_CAL_ENABLE);
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Wire.send(AHT10_DATA_NOP);
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#endif
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if (Wire.endTransmission(true) != 0) return false; //safety check, make sure transmission complete
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delay(AHT10_COMMAND_DELAY);
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return true;
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if (Wire.endTransmission(true) != 0) return false; //safety check, make sure transmission complete
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return true;
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}
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@ -293,7 +307,7 @@ uint8_t AHT10::readStatusByte()
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if (Wire.available() != 1) return AHT10_ERROR; //check rxBuffer & error handler, collision on I2C bus
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/* read byte from "wire.h" rxBuffer */
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#if ARDUINO >= 100
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#if (ARDUINO) >= 100
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return Wire.read();
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#else
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return Wire.receive();
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@ -333,17 +347,21 @@ bool AHT10::enableFactoryCalCoeff()
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/* load factory calibration coeff */
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Wire.beginTransmission(_address);
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#if ARDUINO >= 100
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Wire.write(AHT10_INIT_CMD); //set command mode
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Wire.write(AHT10_INIT_CAL_ENABLE); //x,x,x,x,0,x,x,x
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#if (ARDUINO) >= 100
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if (_sensorName != AHT20_SENSOR) Wire.write(AHT10_INIT_CMD); //set command mode
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else Wire.write(AHT20_INIT_CMD);
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Wire.write(AHT10_INIT_CAL_ENABLE); //0,0,0,0,[1],0,0,0
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Wire.write(AHT10_DATA_NOP); //0,0,0,0,0,0,0,0
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#else
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Wire.send(AHT10_INIT_CMD);
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if (_sensorName != AHT20_SENSOR) Wire.send(AHT10_INIT_CMD);
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else Wire.send(AHT20_INIT_CMD);
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Wire.send(AHT10_INIT_CAL_ENABLE);
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Wire.send(AHT10_DATA_NOP);
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#endif
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if (Wire.endTransmission(true) != 0) return false; //safety check, make sure transmission complete
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if (Wire.endTransmission(true) != 0) return false; //safety check, make sure transmission complete
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delay(AHT10_COMMAND_DELAY);
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delay(AHT10_CMD_DELAY);
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/*check calibration enable */
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if (getCalibrationBit() == 0x01) return true;
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@ -358,8 +376,8 @@ bool AHT10::enableFactoryCalCoeff()
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Read busy bit from status byte
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NOTE:
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- 0, sensor idle
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- 1, sensor busy
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- 0, sensor idle & sleeping
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- 1, sensor busy & in measurement state
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*/
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/**************************************************************************/
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uint8_t AHT10::getBusyBit(bool readI2C)
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