Component: Temp / Humidity (DHT11) (Environmental): Difference between revisions
No edit summary |
m Text replacement - "style="background-color:#EAE1EA;"" to "class="mtx-class-propfolder"" |
||
| (7 intermediate revisions by 2 users not shown) | |||
| Line 17: | Line 17: | ||
==Component Source Code== | ==Component Source Code== | ||
Please click here to download the component source project: [https://www.flowcode.co.uk/wiki/componentsource/ | Please click here to download the component source project: [https://www.flowcode.co.uk/wiki/componentsource/FC_Comp_Source_DHT11.fcfx FC_Comp_Source_DHT11.fcfx] | ||
Please click here to view the component source code (Beta): [https://www.flowcode.co.uk/FlowchartView/?wfile=componentsource/ | Please click here to view the component source code (Beta): [https://www.flowcode.co.uk/FlowchartView/?wfile=componentsource/FC_Comp_Source_DHT11.fcfx FC_Comp_Source_DHT11.fcfx] | ||
==Detailed description== | ==Detailed description== | ||
| Line 74: | Line 74: | ||
Example Program showing how to sample the DHT11 sensor and show the temperature and humidity on an LCD. | Example Program showing how to sample the DHT11 sensor and show the temperature and humidity on an LCD. | ||
{{Fcfile|DHT11_Example.fcfx|DHT11 Example}} | {{Fcfile|DHT11_Example.fcfx|DHT11 Example}} | ||
| Line 84: | Line 88: | ||
===GetHumidityFloat=== | ===GetHumidityFloat=== | ||
{| class="wikitable | {| class="mtx-class-macrotable wikitable" | ||
|- | |- | ||
| width="10%" align="center" | | width="10%" align="center" class="mtx-class-macrohead" | [[File:Fc9-comp-macro.png]] | ||
| width="90%" | | width="90%" class="mtx-class-macrohead" | '''GetHumidityFloat''' | ||
|- | |- | ||
| colspan="2" | Gets the humidity returned by calling SampleSensor as a floating point number. | | colspan="2" | Gets the humidity returned by calling SampleSensor as a floating point number. | ||
| Line 98: | Line 102: | ||
===GetHumidityReal=== | ===GetHumidityReal=== | ||
{| class="wikitable | {| class="mtx-class-macrotable wikitable" | ||
|- | |- | ||
| width="10%" align="center" | | width="10%" align="center" class="mtx-class-macrohead" | [[File:Fc9-comp-macro.png]] | ||
| width="90%" | | width="90%" class="mtx-class-macrohead" | '''GetHumidityReal''' | ||
|- | |- | ||
| colspan="2" | Gets the real number portion of the humidity returned by calling SampleSensor. If humidity is 15.8 % then this function would return 8. | | colspan="2" | Gets the real number portion of the humidity returned by calling SampleSensor. If humidity is 15.8 % then this function would return 8. | ||
| Line 112: | Line 116: | ||
===GetHumidityString=== | ===GetHumidityString=== | ||
{| class="wikitable | {| class="mtx-class-macrotable wikitable" | ||
|- | |- | ||
| width="10%" align="center" | | width="10%" align="center" class="mtx-class-macrohead" | [[File:Fc9-comp-macro.png]] | ||
| width="90%" | | width="90%" class="mtx-class-macrohead" | '''GetHumidityString''' | ||
|- | |- | ||
| colspan="2" | Gets the humidity returned by calling SampleSensor as a string. | | colspan="2" | Gets the humidity returned by calling SampleSensor as a string. | ||
| Line 126: | Line 130: | ||
===GetHumidityWhole=== | ===GetHumidityWhole=== | ||
{| class="wikitable | {| class="mtx-class-macrotable wikitable" | ||
|- | |- | ||
| width="10%" align="center" | | width="10%" align="center" class="mtx-class-macrohead" | [[File:Fc9-comp-macro.png]] | ||
| width="90%" | | width="90%" class="mtx-class-macrohead" | '''GetHumidityWhole''' | ||
|- | |- | ||
| colspan="2" | Gets the whole number portion of the humidity returned by calling SampleSensor. If humidity is 15.8 % then this function would return 15. | | colspan="2" | Gets the whole number portion of the humidity returned by calling SampleSensor. If humidity is 15.8 % then this function would return 15. | ||
| Line 140: | Line 144: | ||
===GetTempFloat=== | ===GetTempFloat=== | ||
{| class="wikitable | {| class="mtx-class-macrotable wikitable" | ||
|- | |- | ||
| width="10%" align="center" | | width="10%" align="center" class="mtx-class-macrohead" | [[File:Fc9-comp-macro.png]] | ||
| width="90%" | | width="90%" class="mtx-class-macrohead" | '''GetTempFloat''' | ||
|- | |- | ||
| colspan="2" | Gets the temperature returned by calling SampleSensor as a floating point number. | | colspan="2" | Gets the temperature returned by calling SampleSensor as a floating point number. | ||
| Line 154: | Line 158: | ||
===GetTempReal=== | ===GetTempReal=== | ||
{| class="wikitable | {| class="mtx-class-macrotable wikitable" | ||
|- | |- | ||
| width="10%" align="center" | | width="10%" align="center" class="mtx-class-macrohead" | [[File:Fc9-comp-macro.png]] | ||
| width="90%" | | width="90%" class="mtx-class-macrohead" | '''GetTempReal''' | ||
|- | |- | ||
| colspan="2" | 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. | | colspan="2" | 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. | ||
| Line 168: | Line 172: | ||
===GetTempString=== | ===GetTempString=== | ||
{| class="wikitable | {| class="mtx-class-macrotable wikitable" | ||
|- | |- | ||
| width="10%" align="center" | | width="10%" align="center" class="mtx-class-macrohead" | [[File:Fc9-comp-macro.png]] | ||
| width="90%" | | width="90%" class="mtx-class-macrohead" | '''GetTempString''' | ||
|- | |- | ||
| colspan="2" | Gets the temperature returned by calling SampleSensor as a string. | | colspan="2" | Gets the temperature returned by calling SampleSensor as a string. | ||
| Line 182: | Line 186: | ||
===GetTempWhole=== | ===GetTempWhole=== | ||
{| class="wikitable | {| class="mtx-class-macrotable wikitable" | ||
|- | |- | ||
| width="10%" align="center" | | width="10%" align="center" class="mtx-class-macrohead" | [[File:Fc9-comp-macro.png]] | ||
| width="90%" | | width="90%" class="mtx-class-macrohead" | '''GetTempWhole''' | ||
|- | |- | ||
| colspan="2" | 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. | | colspan="2" | 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. | ||
| Line 196: | Line 200: | ||
===SampleSensor=== | ===SampleSensor=== | ||
{| class="wikitable | {| class="mtx-class-macrotable wikitable" | ||
|- | |- | ||
| width="10%" align="center" | | width="10%" align="center" class="mtx-class-macrohead" | [[File:Fc9-comp-macro.png]] | ||
| width="90%" | | width="90%" class="mtx-class-macrohead" | '''SampleSensor''' | ||
|- | |- | ||
| colspan="2" | 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. | | colspan="2" | 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. | ||
| Line 207: | Line 211: | ||
| width="90%" style="border-top: 2px solid #000;" | ''Return'' | | width="90%" style="border-top: 2px solid #000;" | ''Return'' | ||
|} | |} | ||
==Property reference== | ==Property reference== | ||
{| class="wikitable | {| class="mtx-class-macrotable wikitable" | ||
|- | |- | ||
| width="10%" align="center" | | width="10%" align="center" class="mtx-class-macrohead" | [[File:Fc9-prop-icon.png]] | ||
| width="90%" | | width="90%" class="mtx-class-macrohead" | '''Properties''' | ||
|- | |- | ||
|- | |- | ||
| Line 229: | Line 231: | ||
| colspan="2" | The checksum value is used to ensure the data being received is correct. Yes = Only receive data if checksum is correct No = Ignore checksum | | colspan="2" | The checksum value is used to ensure the data being received is correct. Yes = Only receive data if checksum is correct No = Ignore checksum | ||
|- | |- | ||
| width="10%" align="center" | | width="10%" align="center" class="mtx-class-propfolder" | [[File:Fc9-conn-icon.png]] | ||
| width="90%" | | width="90%" class="mtx-class-propfolder" | Advanced Settings | ||
|- | |- | ||
|- | |- | ||
Latest revision as of 14:37, 13 July 2026
| Author | Matrix TSL |
| Version | 1.1 |
| Category | Environmental |
Temp / Humidity (DHT11) component
The DHT11 temperature and humidity sensor is a popular sensor allowing the ambient temperature and relative humidity to be monitored digitally. Humidity Range = 20% - 90% +/- 5% Temperature Range = 0 - 50 Degrees C +/- 2 Degrees C
Component Source Code
Please click here to download the component source project: FC_Comp_Source_DHT11.fcfx
Please click here to view the component source code (Beta): FC_Comp_Source_DHT11.fcfx
Detailed description
No detailed description exists yet for this component
Examples
Example Program showing how to sample the DHT11 sensor and show the temperature and humidity on an LCD.
DHT11 Example
Macro reference
GetHumidityFloat
|
GetHumidityFloat |
| Gets the humidity returned by calling SampleSensor as a floating point number. | |
 - FLOAT
|
Return |
GetHumidityReal
|
|
GetHumidityReal |
| Gets the real number portion of the humidity returned by calling SampleSensor. If humidity is 15.8 % then this function would return 8. | |
 - INT
|
Return |
GetHumidityString
|
|
GetHumidityString |
| Gets the humidity returned by calling SampleSensor as a string. | |
 - STRING
|
Return |
GetHumidityWhole
|
|
GetHumidityWhole |
| Gets the whole number portion of the humidity returned by calling SampleSensor. If humidity is 15.8 % then this function would return 15. | |
| - INT
|
Return |
GetTempFloat
|
|
GetTempFloat |
| Gets the temperature returned by calling SampleSensor as a floating point number. | |
| - FLOAT
|
Return |
GetTempReal
|
|
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. | |
| - INT
|
Return |
GetTempString
|
|
GetTempString |
| Gets the temperature returned by calling SampleSensor as a string. | |
| - STRING
|
Return |
GetTempWhole
|
|
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. | |
| - INT
|
Return |
SampleSensor
|
|
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
|
Return |
Property reference
|
Properties |
|
Data Pin |
| Microcontroller I/O Pin connected to the DHT11 sensor data pin. | |
|
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 | |
|
Advanced Settings |
|
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. | |