TWO BME280 over I2C

#1

Is there a way to connect Two BME280 sensors to a LoRa Dev Board: HTCC-AB01 and read data off of each? On other arduino boards you can do this by creating multiple I2C address and connection both to the I2C bus. Not sure how I would do this with the cube cell board. Any help is greatly appreciated!

#2

This article illustrates how to set the I2C address on one particular type of BME280 module [to either 0x76 or 0x77] (the default on this module is 0x76).

While I’ve not tried it on a CubeCell, this thread also discusses the definition of a second I2C bus, which, provided the relevant Cubecell library supports it, allows the specification of a separate pair of SDA/SCL pins for the second bus. In this case, since they are on separate buses, you can use the default BME280 I2C on each module.

#3

Thank you. I ended up using an adafruit BME280 library and I had to physically solder a jumper per the article you sent on BME280’s so thank you!
Here is some example code that I got to work. 0x76 is the default.
#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_BME280.h>

#define SEALEVELPRESSURE_HPA (1013.25)

Adafruit_BME280 bme1; // I2C
Adafruit_BME280 bme2; // I2C

void setup() {
  Serial.begin(9600);

  if (!bme1.begin(0x76)) {
    Serial.println("Could not find a valid BME280 sensor, check wiring!");
    //while (1);
  }
  
  if (!bme2.begin(0x77)) {
    Serial.println("Could not find a valid BME280 sensor, check wiring!");
    //while (2);
  }
 
  
}

void loop() {
  Serial.print("Temperature1 = ");
  Serial.print(bme1.readTemperature());
  Serial.println("*C");
   Serial.print("Temperature2 = ");
  Serial.print(bme2.readTemperature());
  Serial.println("*C");
/*
  Serial.print("Pressure = ");
  Serial.print(bme1.readPressure() / 100.0F);
  Serial.println("hPa");

  Serial.print("Approx. Altitude = ");
  Serial.print(bme1.readAltitude(SEALEVELPRESSURE_HPA));
  Serial.println("m");

  Serial.print("Humidity = ");
  Serial.print(bme1.readHumidity());
  Serial.println("%");

  Serial.println();
*/
  delay(1000);
}