Multiple Sensors in one Board.s

Other Hardware Sensors
1

I have used:

  1. BMP280
  2. BMP390
  3. AHT20
  4. DS3231
  5. LPS22HB
  6. HS3001
  7. MPU6050
  8. MPU9250

Board used : Arduino Nano Ble Sense Rev 2

Connected everything using I2C protocol on breadboard.
Facing issues with #5 , #7 and #8 sensors.

My Code :

#include <Arduino_LPS22HB.h>
#include <Arduino_HS300x.h>
#include <DS3231.h>
#include "Adafruit_BMP3XX.h"
#include <Adafruit_BMP280.h>
#include <Adafruit_AHTX0.h>
#include <Adafruit_MPU6050.h>
#include <MPU9250.h>
#include <Adafruit_Sensor.h>
#include <Wire.h>

DS3231 rtc;
Adafruit_BMP3XX bmp390;
Adafruit_BMP280 bmp280;
Adafruit_AHTX0 aht;
Adafruit_MPU6050 mpu6050;
MPU9250 mpu9250;



void setup() {
  Serial.begin(9600);
  while (!Serial) {
  }
  

  if (!BARO.begin()) {
    Serial.println("Failed to initialize pressure sensor!");
    while (1)
      ;
  }
  
  if (!HS300x.begin()) {
    Serial.println("Failed to initialize humidity temperature sensor!");
    while (1)
      ;
  }
  if (!bmp390.begin_I2C()) {
    Serial.println("Could not find a valid BMP390 sensor!");
    while (1)
      ;
  }
  if (!bmp280.begin()) {
    Serial.println("Could not find a valid BMP280 sensor!");
    while (1)
      ;
  }
  if (!aht.begin()) {
    Serial.println("AHT20 is not connected!");
    while (1)
      ;
  }
  /*
  if(!mpu6050.begin()){
    Serial.println("Error in mpu6050");
    while(1);
  }*/
  if(!mpu9250.setup(0x68)){
    Serial.println("Error in mpu9250");
  }
  
}
void loop() {
  
  sensors_event_t humidity, ahttemp;
  aht.getEvent(&humidity, &ahttemp);
/*
  sensors_event_t a, g, temp6050;
	mpu6050.getEvent(&a, &g, &temp6050);
*/
  mpu9250.update();

  Serial.print("Baro temperature : ");
  Serial.print(BARO.readTemperature());
  Serial.print("°C");

  Serial.println();
  Serial.print("HS300X temperature : ");
  Serial.print(HS300x.readTemperature());
  Serial.print("°C");

  Serial.println();
  Serial.print("RTC temperature : ");
  Serial.print(rtc.getTemperature());
  Serial.print("°C");

  Serial.println();
  Serial.print("BMP390 temperature : ");
  Serial.print(bmp390.readTemperature());
  Serial.print("°C");

  Serial.println();

  Serial.print("BMP280 temperature : ");
  Serial.print(bmp280.readTemperature());
  Serial.print("°C");

  Serial.println();

  Serial.print("AHT20 temperature : ");
  Serial.print(ahttemp.temperature);
  Serial.print("°C");

  Serial.println();

  Serial.print("MPU9250 temperature : ");
  Serial.print(mpu9250.getTemperature());
  Serial.print("°C");

  Serial.println();
/*
  Serial.print("MPU6050 temperature : ");
  Serial.print(temp6050.temperature);
  Serial.print("°C");

  Serial.println();
*/
  Serial.println();

  Serial.println();

  delay(1000);
}

Commented MPU6050 because it was giving some error.

Output :

image

Tried testing individual sensors.. It was working.

2

It will help others to help you if you can explain what the issues / errors are.

Without looking up the datasheets for these devices, could the issue(s) be related to a clash of I2C addresses?

Are these sensors on breakout boards? Do several of them have pull up resistors on the I2C bus?

3

you have a large number of sensors? how are you powering them?
the Arduino Nano Ble Sense Rev 2 is a 3.3V logic device
if you are connecting sensors which use 5V logic use level shifts or potential dividers

4

I forgot to add that you could try and run an I2C scanner to check that all your devices are detected.

5

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