143 lines
3.4 KiB
Arduino
143 lines
3.4 KiB
Arduino
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/*
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BME280I2C Modes.ino
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This code shows how to use predefined recommended settings from Bosch for
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the BME280I2C environmental sensor.
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GNU General Public License
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Written: Dec 30 2015.
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Last Updated: Sep 23 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 <BME280I2C.h>
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#include <Wire.h> // Needed for legacy versions of Arduino.
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#define SERIAL_BAUD 115200
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/* Recommended Modes -
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Based on Bosch BME280I2C environmental sensor data sheet.
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Weather Monitoring :
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forced mode, 1 sample/minute
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pressure ×1, temperature ×1, humidity ×1, filter off
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Current Consumption = 0.16 μA
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RMS Noise = 3.3 Pa/30 cm, 0.07 %RH
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Data Output Rate 1/60 Hz
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Humidity Sensing :
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forced mode, 1 sample/second
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pressure ×0, temperature ×1, humidity ×1, filter off
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Current Consumption = 2.9 μA
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RMS Noise = 0.07 %RH
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Data Output Rate = 1 Hz
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Indoor Navigation :
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normal mode, standby time = 0.5ms
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pressure ×16, temperature ×2, humidity ×1, filter = x16
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Current Consumption = 633 μA
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RMS Noise = 0.2 Pa/1.7 cm
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Data Output Rate = 25Hz
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Filter Bandwidth = 0.53 Hz
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Response Time (75%) = 0.9 s
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Gaming :
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normal mode, standby time = 0.5ms
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pressure ×4, temperature ×1, humidity ×0, filter = x16
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Current Consumption = 581 μA
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RMS Noise = 0.3 Pa/2.5 cm
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Data Output Rate = 83 Hz
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Filter Bandwidth = 1.75 Hz
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Response Time (75%) = 0.3 s
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*/
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BME280I2C::Settings settings(
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BME280::OSR_X1,
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BME280::OSR_X1,
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BME280::OSR_X1,
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BME280::Mode_Forced,
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BME280::StandbyTime_1000ms,
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BME280::Filter_Off,
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BME280::SpiEnable_False,
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0x76 // I2C address. I2C specific.
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);
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BME280I2C bme(settings);
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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 BME280I2C 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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// Change some settings before using.
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settings.tempOSR = BME280::OSR_X4;
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bme.setSettings(settings);
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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->println(" Pa");
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delay(1000);
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}
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