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106 lines
2.9 KiB
106 lines
2.9 KiB
#include "BME280.h"
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#include <Wire.h>
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#include <SPI.h>
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#include <Adafruit_Sensor.h>
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#include <Adafruit_BME280.h>
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BME280::BME280() {
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valid = false;
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}
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bool BME280::begin(void) {
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// SPI.begin(BME_SCK, BME_MISO, BME_MOSI, BME_CS);
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pinMode(18, OUTPUT);
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digitalWrite(18, HIGH); // disable LoRa_CS
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pinMode(BME_CS, OUTPUT);
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digitalWrite(BME_CS, LOW); // enable bme280 CS
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delay(100);
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bme = new Adafruit_BME280(BME_CS, BME_MOSI, BME_MISO, BME_SCK); // software SPI
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valid = bme->begin();
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if (!valid) bme->init();
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if (!valid) return false;
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bme->setSampling(Adafruit_BME280::sensor_mode::MODE_NORMAL,
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Adafruit_BME280::sensor_sampling::SAMPLING_X16,
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Adafruit_BME280::sensor_sampling::SAMPLING_X16,
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Adafruit_BME280::sensor_sampling::SAMPLING_X16,
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Adafruit_BME280::sensor_filter::FILTER_OFF,
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Adafruit_BME280::standby_duration::STANDBY_MS_250);
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return true;
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}
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void BME280::sleep() {
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bme->setSampling(Adafruit_BME280::sensor_mode::MODE_SLEEP,
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Adafruit_BME280::sensor_sampling::SAMPLING_X16,
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Adafruit_BME280::sensor_sampling::SAMPLING_X16,
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Adafruit_BME280::sensor_sampling::SAMPLING_X16,
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Adafruit_BME280::sensor_filter::FILTER_OFF,
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Adafruit_BME280::standby_duration::STANDBY_MS_1000);
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}
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bool BME280::reinit() {
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pinMode(18, OUTPUT);
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digitalWrite(18, HIGH); // disable LoRa_CS
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pinMode(BME_CS, OUTPUT);
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digitalWrite(BME_CS, LOW); // enable bme280 CS
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int retries = 0; valid = false;
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while (!valid) {
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if (retries > 9) break;
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valid = bme->init();
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retries++;
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delay(100);
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float p = bme->readPressure() / 100.0F;
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if (p < 300 || p > 1100) valid = false;
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// constexpr byte BME280_REGISTER_SOFTRESET = 0xE0;
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// bme->write8(BME280_REGISTER_SOFTRESET, 0xB6);
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}
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if (!valid) {
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Serial.println("Could not find a valid BME280 sensor, check wiring!");
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return false;
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}
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}
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void BME280::printValues() {
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Serial.print("Temperature = ");
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Serial.print(bme->readTemperature());
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Serial.println(" *C");
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Serial.print("Pressure = ");
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Serial.print(bme->readPressure() / 100.0F);
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Serial.println(" hPa");
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Serial.print("Approx. Altitude = ");
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Serial.print(bme->readAltitude(SEALEVELPRESSURE_HPA));
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Serial.println(" m");
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Serial.print("Humidity = ");
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Serial.print(bme->readHumidity());
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Serial.println(" %");
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Serial.println();
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}
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float BME280::readTemperature(void) {
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float temp = bme->readTemperature();
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if (temp < -40 || temp > 85) valid = false;
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else valid = true;
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return temp;
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}
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float BME280::readPressure(void) {
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float p = bme->readPressure() / 100.0F;
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if (p < 300 || p > 1100) valid = false;
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else valid = true;
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return p;
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}
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float BME280::readHumidity(void) {
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float h = bme->readHumidity();
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if (h < 0 || h > 100) valid = false;
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else valid = true;
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return h;
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}
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