Arduino sketch for BME280 to spew JSON data

bme280_json.ino

#include <Wire.h>
#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

void setup() {
    Serial.begin(9600);
    
    // default settings
    bool status = bme.begin();
    if (!status) {
        Serial.println("Could not find a valid BME280 sensor, check wiring!");
        while (1);
    }

    // wait 1s for sensor initialization
    delay(1000);
}

void loop() {
    // get data
    float temp = bme.readTemperature(); // in C
    float pres = bme.readPressure() / 100.0F; // in hPa
    float alt = bme.readAltitude(SEALEVELPRESSURE_HPA); // in M
    float hum = bme.readHumidity(); // in %

    // send to serial
    printDataJSON(temp, pres, alt, hum);

    // delay 1000ms before sending another data
    delay(1000); 
}

// Print the data as JSON to serial
void printDataJSON(float temp, float pres, float alt, float hum) {
    Serial.print("{");
    Serial.print("\"temp\":");
    Serial.print(temp);
    Serial.print(",");
    Serial.print("\"pressure\":");
    Serial.print(pres);
    Serial.print(",");
    Serial.print("\"altitude\":");
    Serial.print(alt);
    Serial.print(",");
    Serial.print("\"humidity\":");
    Serial.print(hum);
    Serial.print("}");
    Serial.print("\n");
}