111 lines
3.2 KiB
Arduino
111 lines
3.2 KiB
Arduino
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/*
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Environment_Calculations.ino
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This code shows how to record data from the BME280 environmental sensor
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and perform various calculations.
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GNU General Public License
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Written: Dec 30 2015.
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Last Updated: Oct 07 2017.
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Connecting the BME280 Sensor:
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Sensor -> Board
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-----------------------------
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Vin (Voltage In) -> 3.3V
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Gnd (Ground) -> Gnd
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SDA (Serial Data) -> A4 on Uno/Pro-Mini, 20 on Mega2560/Due, 2 Leonardo/Pro-Micro
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SCK (Serial Clock) -> A5 on Uno/Pro-Mini, 21 on Mega2560/Due, 3 Leonardo/Pro-Micro
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*/
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#include <EnvironmentCalculations.h>
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#include <BME280I2C.h>
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#include <Wire.h>
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#define SERIAL_BAUD 115200
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BME280I2C bme; // Default : forced mode, standby time = 1000 ms
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// Oversampling = pressure ×1, temperature ×1, humidity ×1, filter off,
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//////////////////////////////////////////////////////////////////
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void setup()
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{
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Serial.begin(SERIAL_BAUD);
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while(!Serial) {} // Wait
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Wire.begin();
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while(!bme.begin())
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{
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Serial.println("Could not find BME280 sensor!");
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delay(1000);
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}
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// bme.chipID(); // Deprecated. See chipModel().
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switch(bme.chipModel())
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{
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case BME280::ChipModel_BME280:
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Serial.println("Found BME280 sensor! Success.");
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break;
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case BME280::ChipModel_BMP280:
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Serial.println("Found BMP280 sensor! No Humidity available.");
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break;
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default:
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Serial.println("Found UNKNOWN sensor! Error!");
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}
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}
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//////////////////////////////////////////////////////////////////
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void loop()
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{
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printBME280Data(&Serial);
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delay(500);
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}
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//////////////////////////////////////////////////////////////////
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void printBME280Data
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(
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Stream* client
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)
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{
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float temp(NAN), hum(NAN), pres(NAN);
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BME280::TempUnit tempUnit(BME280::TempUnit_Celsius);
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BME280::PresUnit presUnit(BME280::PresUnit_Pa);
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bme.read(pres, temp, hum, tempUnit, presUnit);
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client->print("Temp: ");
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client->print(temp);
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client->print("°"+ String(tempUnit == BME280::TempUnit_Celsius ? "C" :"F"));
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client->print("\t\tHumidity: ");
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client->print(hum);
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client->print("% RH");
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client->print("\t\tPressure: ");
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client->print(pres);
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client->print(" Pa");
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EnvironmentCalculations::AltitudeUnit envAltUnit = EnvironmentCalculations::AltitudeUnit_Meters;
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EnvironmentCalculations::TempUnit envTempUnit = EnvironmentCalculations::TempUnit_Celsius;
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float altitude = EnvironmentCalculations::Altitude(pres, envAltUnit);
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float dewPoint = EnvironmentCalculations::DewPoint(temp, hum, envTempUnit);
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float seaLevel = EnvironmentCalculations::EquivalentSeaLevelPressure(altitude, temp, pres);
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// seaLevel = EnvironmentCalculations::SealevelAlitude(altitude, temp, pres); // Deprecated. See EquivalentSeaLevelPressure().
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client->print("\t\tAltitude: ");
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client->print(altitude);
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client->print((envAltUnit == EnvironmentCalculations::AltitudeUnit_Meters ? "m" : "ft"));
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client->print("\t\tDew point: ");
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client->print(dewPoint);
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client->print("°"+ String(envTempUnit == EnvironmentCalculations::TempUnit_Celsius ? "C" :"F"));
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client->print("\t\tEquivalent Sea Level Pressure: ");
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client->print(seaLevel);
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client->println(" Pa");
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delay(1000);
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}
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