A firmware library for the SparkFun's RHT03 humidity and temperaure sensor.
The RHT03 is a one-wire digital sensor that measures relative humidity from 0-100% and temperature from -40-80 deg C.
- /firmware - Source files for the library (.cpp, .h).
- /firmware/examples - Example sketches for the library (.cpp). Run these from the Particle IDE.
- spark.json - General library properties for the Particle library manager.
To begin, create an RHT03 class object. This'll often go in the global section of the code:
///////////////////////////
// RHT03 Object Creation //
///////////////////////////
RHT03 rht; // This creates a RTH03 object, which we'll use to interact with the sensor
To initialize the sensor, call the begin([pin]) function, where [pin] is the Photon pin connected to the RHT03 data pin.
void setup()
{
...
rht.begin(D3); // Initialize an RHT03 sensor, with the data pin connected to D3.
...
}
Temperature and humidity values are updated in one fell single-wire swoop. To get new values from the sensor, call update(). update() returns either 1 on success, or a negative value if it fails.
int updateRet = rht.update();
If the update succeeds, use the humidity(), tempC(), and tempF() functions to get relative humidity, celsius, and farenheit temperatures. All variables are returned as float's.
if (updateRet == 1)
{
float rh = rht.humidity();
float tf = rht.tempF();
float tc = rht.tempC();
}
This product is open source!
Please review the LICENSE.md file for license information.
If you have any questions or concerns on licensing, please contact techsupport@sparkfun.com.
Distributed as-is; no warranty is given.
- Your friends at SparkFun.