A place for all the arduino code I write.
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/***************************************************************************
This is a library for the BME280 humidity, temperature & pressure sensor
Designed specifically to work with the Adafruit BME280 Breakout
----> http://www.adafruit.com/products/2650
These sensors use I2C or SPI to communicate, 2 or 4 pins are required
to interface. The device's I2C address is either 0x76 or 0x77.
Adafruit invests time and resources providing this open source code,
please support Adafruit andopen-source hardware by purchasing products
from Adafruit!
Written by Limor Fried & Kevin Townsend for Adafruit Industries.
BSD license, all text above must be included in any redistribution
See the LICENSE file for details.
***************************************************************************/
/*
Adapted by Starbeamrainbowlabs <https://starbeamrainbowlabs.com/>
GitHub: @sbrl | Twitter: @SBRLabs | Reddit: u/Starbeamrainbowlabs
# PROTOCOL SPEC
## INPUT
4 character commands. Whitespace and non-printable characters are ignored.
### COMMANDS
Command | Meaning
--------|-----------------------------------------------------------
read | Read the sensor values and write the result to stdout
*/
#include <Wire.h>
#include <SPI.h>
// These libraries need installing in the Arduino IDE Library Manager (if you install the BME280 one it should prompt for the unified sensor library automatically)
#include <Adafruit_Sensor.h>
#include <Adafruit_BME280.h>
#define BME_SCK 13
#define BME_MISO 12
#define BME_MOSI 11
#define BME_CS 10
#define SEALEVELPRESSURE_HPA (1013.25)
Adafruit_BME280 bme; // I2C
//Adafruit_BME280 bme(BME_CS); // hardware SPI
//Adafruit_BME280 bme(BME_CS, BME_MOSI, BME_MISO, BME_SCK); // software SPI
// Read buffer
#define BUFFER_SIZE 4
int bufferIndex = 0;
char buffer[BUFFER_SIZE];
void setup() {
Serial.begin(9600);
while(!Serial); // time to get serial running
Serial.println(F("BME280 test"));
unsigned status;
// default settings
status = bme.begin(0x76);
// You can also pass in a Wire library object like &Wire2
// status = bme.begin(0x76, &Wire2)
if (!status) {
Serial.println("Could not find a valid BME280 sensor, check wiring, address, sensor ID!");
Serial.print("SensorID was: 0x"); Serial.println(bme.sensorID(),16);
Serial.print(" ID of 0xFF probably means a bad address, a BMP 180 or BMP 085\n");
Serial.print(" ID of 0x56-0x58 represents a BMP 280,\n");
Serial.print(" ID of 0x60 represents a BME 280.\n");
Serial.print(" ID of 0x61 represents a BME 680.\n");
while (1) delay(10);
}
Serial.println("-- Default Test --");
Serial.println();
}
void loop() {
while(Serial.available() > 0) {
buffer[bufferIndex] = Serial.read();
// Serial.print("Reading char, index: ");
// Serial.print(bufferIndex, DEC);
// Serial.print(", is greater: ");
// Serial.print(bufferIndex >= BUFFER_SIZE);
// Serial.print(", char: ");
// Serial.print(buffer[bufferIndex]);
// Serial.print(", hex: ");
// Serial.println(buffer[bufferIndex], HEX);
// If it's a newline character, overwrite it
if(buffer[bufferIndex] < 48 || buffer[bufferIndex] > 122) {
// Serial.println("Skipping unrecognised char");
continue;
}
if(bufferIndex >= BUFFER_SIZE - 1) {
// Serial.println("Handling command");
handle_command();
// Serial.print("Resetting index, is now: ");
bufferIndex = 0;
// Serial.println(bufferIndex, DEC);
continue;
}
// Serial.println("Incrementing counter");
bufferIndex += 1;
}
}
void handle_command() {
// Serial.print("strcmp: ");
// Serial.println(strncmp(buffer, "read", BUFFER_SIZE), DEC);
if(strncmp(buffer, "read", BUFFER_SIZE) == 0) { // 0 = They are the same
printValues();
}
else {
Serial.print("Error: Unknown command ");
Serial.println(buffer);
}
}
void printValues() {
Serial.print("Temperature ");
Serial.println(bme.readTemperature());
// Serial.println(" *C");
Serial.print("Pressure ");
Serial.println(bme.readPressure() / 100.0F);
// Serial.println(" hPa");
Serial.print("ApproxAltitude ");
Serial.println(bme.readAltitude(SEALEVELPRESSURE_HPA));
// Serial.println(" m");
Serial.print("Humidity ");
Serial.println(bme.readHumidity());
// Serial.println(" %");
// Serial.println();
}