Component: Temp / Humidity (Grove 101020019) (101020019) (Environmental)
| Author | Matrix TSL |
| Version | 1.2 |
| Category | Environmental |
Temp / Humidity (Grove 101020019) component
The DHT22 temperature and humidity sensor is a popular sensor allowing the ambient temperature and relative humidity to be monitored digitally. Humidity Range = 0% - 100% +/- 2% Temperature Range = -40 - 80 Degrees C +/- 0.5 Degrees C
Detailed description
No detailed description exists yet for this component
Examples
No additional examples
Downloadable macro reference
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GetTempWhole |
| Gets the whole number portion of the temperature returned by calling SampleSensor. If temperature is 15.8 degrees C then this function would return 15. | |
| [[File:]] - | Return |
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GetHumidityFloat |
| Gets the humidity returned by calling SampleSensor as a floating point number. If humidity is 15.8 % then this function would return 15.8. | |
| [[File:]] - | Return |
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GetTempString |
| Gets the temperature returned by calling SampleSensor as a string. If temperature is 15.8 degrees C then this function would return "15.8". | |
 - STRING
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Return |
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GetHumidityString |
| Gets the humidity returned by calling SampleSensor as a string. If humidity is 15.8 % then this function would return "15.8". | |
| - STRING
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Return |
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GetHumidityWhole |
| Gets the whole number portion of the humidity returned by calling SampleSensor. If humidity is 15.8 % then this function would return 15. | |
| [[File:]] - | Return |
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GetTempReal |
| Gets the real number portion of the temperature returned by calling SampleSensor. If temperature is 15.8 degrees C then this function would return 8. | |
| [[File:]] - | Return |
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GetHumidityReal |
| Gets the real number portion of the humidity returned by calling SampleSensor. If humidity is 15.8 % then this function would return 8. | |
| [[File:]] - | Return |
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SampleSensor |
| Communicates with the DHT11 sensor and receives the temperature and humidity readings. Returns 0 for success, 1 for no communication detected and 2 for checksum error. | |
 - BYTE
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Return |
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GetTempFloat |
| Gets the temperature returned by calling SampleSensor as a floating point number. If temperature is 15.8 degrees C then this function would return 15.8. | |
| [[File:]] - | Return |
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Initialise |
| Starts up the I2C bus and initialises the pressure sensor ready for use. Returns 1 for a sucessful startup. Returns 0 for a failed startup or no device detected. | |
| - BYTE
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Return |
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Initialise |
| Sets up the GSM module. Returns 0 for OK, 255 for no reply and 254 for command fail. | |
| - BYTE
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Return |
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SampleAccel |
| Samples the accelerometer 0 = no new data, 1 = new data available | |
| - BYTE
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Return |
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Left |
| Rotates the robot left - waits for the angle to be traversed before returning | |
 - UINT
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Angle |
| Angle to turn in degrees | |
 - VOID
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Return |
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ReadIR |
| Reads an IR sensor 0=Left, 1=FrontLeft, 2=Front, 3=FrontRight, 4=Right, 5=RearRight, 6=Rear, 7=RearLeft | |
| - BYTE
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index |
| 0=Left, 1=FrontLeft, 2=Front, 3=FrontRight, 4=Right, 5=RearRight, 6=Rear, 7=RearLeft | |
| - UINT
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Return |
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LCDDrawPixel |
| Allows a single pixel on the LCD to be set or cleared | |
| - BYTE
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X |
| X Pixel 0-127 | |
| - BYTE
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Y |
| Y Pixel 0-31 | |
| - BYTE
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State |
| 0=White (Off), 1=Black (On) | |
| - VOID
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Return |
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ServoSetPosition |
| Allows one of the servo positions to be assigned | |
| - BYTE
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Channel |
| Range 0-3 | |
| - BYTE
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Position |
| Range 0-255 | |
| - VOID
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Return |
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CardBitmap |
| Displays a monochrome bitmap read from the card on the LCD | |
| - BYTE
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X |
| Range 0-127 | |
| - BYTE
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Y |
| Range 0-31 | |
| - STRING
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Filename |
| - BYTE
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Return |
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CardRecordMic |
| Records an audio stream on the card from the microphone | |
| - BYTE
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BitDepth |
| 0=8-bit, 1=16-bit | |
| - BYTE
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SampleRate |
| Sample Rate 0=8KHz, 1=16KHz | |
| - UINT
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RecordTime |
| Time to record for in seconds, Range 0-65535 | |
| - STRING
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Filename |
| - BYTE
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Return |
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CardOpen |
| Attempts to open an existing file on the SD card 255=Error, 1=File not found, 0=Open OK | |
| - STRING
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Filename |
| - BYTE
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Return |
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Forwards |
| Drives the robot forwards - waits for the distance to be traversed before returning | |
| - UINT
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Distance |
| Distance in mm | |
| - VOID
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Return |
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ReadBearing |
| Reads the compass bearing based on the degrees clockwise from magnetic north. | |
| [[File:]] - | Return |
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GetConsoleHandle |
| Gets the handle to the console allowing data displaying on the panel etc. | |
| [[File:]] - | Return |
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LCDDrawLine |
| Allows a single pixel width line to be drawn on the LCD | |
| - BYTE
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X1 |
| X Pixel 0-127 | |
| - BYTE
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Y1 |
| Y Pixel 0-31 | |
| - BYTE
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X2 |
| X Pixel 0-127 | |
| - BYTE
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Y2 |
| Y Pixel 0-31 | |
| - VOID
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Return |
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ServoAutoMoveToPosition |
| Allows one of the servo positions to move gradually to a new position | |
| - BYTE
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Channel |
| Range 0-3 | |
| - BYTE
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Position |
| Range 0-255 | |
| - VOID
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Return |
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ReadAllValue |
| Reads a single value stored from the read all command Index dictates which sensor value to read | |
| - BYTE
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Index |
| 0=SW, 1-8=IR, 9-10=Line, 11=Light, 12=Mic, 13-15=Accel | |
| - UINT
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Return |
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LCDBacklight |
| Allows the LCD backlight brighntess to be adjusted | |
| - BYTE
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Intensity |
| Range 0-100, 0=Off, 1=Min Brightness, 100=Max Brightness | |
| - VOID
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Return |
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LCDDrawRect |
| Allows a rectangle to be drawn on the LCD | |
| - BYTE
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X1 |
| X Pixel 0-127 | |
| - BYTE
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Y1 |
| Y Pixel 0-31 | |
| - BYTE
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X2 |
| X Pixel 0-127 | |
| - BYTE
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Y2 |
| Y Pixel 0-31 | |
| - VOID
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Return |
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ReadLine |
| Reads one of the IR line sensors 0-1 0=Left, 1=Right | |
| - BYTE
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index |
| 0=Left, 1=Right | |
| - UINT
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Return |
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ServoDisable |
| Allows one of the servo outputs 0-3 to be disabled | |
| - BYTE
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Channel |
| Range 0-3 | |
| - VOID
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Return |
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ServoEnable |
| Allows one of the servo outputs 0-3 to be enabled | |
| - BYTE
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Channel |
| Range 0-3 | |
| - VOID
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Return |
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CardReadByte |
| Reads a byte from the currently open file. Starts at the beginning of the file and auto increments to the end | |
| - BYTE
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Return |
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CardErase |
| Attempts to delete an existing file on the SD card 255=Error, 1=File not found, 0=Delete OK | |
| - STRING
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Filename |
| - BYTE
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Return |
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CardWriteByte |
| Appends a byte to the end of the currently open file | |
| - BYTE
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Data |
| - VOID
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Return |
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EncoderRead |
| Reads one of the motor encoder counters. Approx 0.328296mm of travel per encoder unit. | |
| - BYTE
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index |
| 0=Left, 1=Right | |
| - UINT
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Return |
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SetMotors |
| Sets the motor speeds without feedback Range -100 to 100 | |
| [[File:]] - | Left |
| Range -100 to 100 | |
| [[File:]] - | Right |
| Range -100 to 100 | |
| - VOID
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Return |
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Backwards |
| Drives the robot backwards - waits for the distance to be traversed before returning | |
| - UINT
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Distance |
| Distance in mm | |
| - VOID
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Return |
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EncoderReset |
| Resets the motor encoder counters | |
| - VOID
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Return |
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LCDVerbose |
| Allows the LCD to automatically report the API commands as they get processed. Default - verbose on | |
| - BYTE
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State |
| 0=Off 1=On | |
| - VOID
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Return |
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SetProp |
| Allows the COM port property to be set from a parent component. | |
| - STRING
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PropName |
 - ULONG
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PropVal |
| - VOID
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Return |
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CardInit |
| Attempts to startup the SD card 255=No Card, 254=Init Fail, 0=Init OK | |
| - BYTE
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Return |
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GetProp |
| Allows the property filter for the COM port list to be copied to a parent component. | |
| - STRING
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PropName |
| - STRING
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Return |
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LCDClear |
| Clears the LCD | |
| - VOID
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Return |
Property reference
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Properties |
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SIG Pin |
| Microcontroller I/O Pin connected to the DHT11 sensor data pin. | |
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Use Checksum |
| The checksum value is used to ensure the data being received is correct. Yes = Only receive data if checksum is correct No = Ignore checksum | |
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Clock Adjustment |
| On 8-bit PIC devices the timings can be a little tight as slower clock speeds and so we implement an adjustment factor to allow the sensor to function. Auto mode will attempt to automatically calculate a correct adjustment factor. Manual mode will allow you to set your own adjustment factor. | |
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Connections |
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Simulations |