Serial Monitor

[gresleyman]

Hi all.

I have just spent 2 days getting my new I Mac desktop to see my UNO R3 board, my new pc can now download to my UNO.
I am training to set up a new BME 280, pressure, temperature and humidity sensor. The problem I have now is I cannot see any data in the Serial Monitor page, while using a test sketch, I sometimes get "BME TEST" but that's all, as I am new to I Mac I thought I would see if anyone can see if I am doing something silly ?This is the sketch I have been using -

#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_BME280.h>

#define SEALEVELPRESSURE_HPA (1013.25)

Adafruit_BME280 bme;

void setup() {
  Serial.begin(9600);

  if (!bme.begin(0x76)) {
    Serial.println("Could not find a valid BME280 sensor, check wiring!");
    while (1);
  }
}

void loop() {
  Serial.print("Temperature = ");
  Serial.print(bme.readTemperature());
  Serial.println("*C");

  Serial.print("Pressure = ");
  Serial.print(bme.readPressure() / 100.0F);
  Serial.println("hPa");

  Serial.print("Approx. Altitude = ");
  Serial.print(bme.readAltitude(SEALEVELPRESSURE_HPA));
  Serial.println("m");

  Serial.print("Humidity = ");
  Serial.print(bme.readHumidity());
  Serial.println("%");

  Serial.println();
  delay(1000);
}

[wildbill]

I don't see the word 'test' in your code anywhere and I doubt that Adafruit is printing anything to the monitor so I don't think that sketch actually got loaded.

Try something simpler to prove it - just print "Hello" for example, without all the BME libraries.

[gcjr]

it's often useful to print a unique string, such as a date (e.g. 210409a) to verify which code is loaded and running, to remove any doubt.

[drmpf]

Try adding this at the top of your setup (I add it to all my sketches)

void setup() {
  Serial.begin(9600);
  for (int i = 10; i > 0; i--) {
    Serial.print(' '); Serial.print(i);
    delay(500);
  }
  Serial.println();
// . . . 
}

and see if you get the 10 9 8 .. printed out.
Adjust the IDE baud rate to 9600.