Using I2C multiplexer TCA9548 in daisy chain with MLX90393

Firmware
1

Hi, I am working with an Argon and sensors MLX90393 and a multiplexer I2C tca9845. In particular, I have the following function to call the mux's channels:

void tcaselect(uint8_t i)
{
      if (i > 7) return;
     
      Wire.beginTransmission(TCAADDR);
      Wire.write(1 << i);
      Wire.endTransmission();  
}

in the setup i set the sensors' features:

void setup()
{ 
  Serial.begin(9600);
  Wire.begin();
  pinMode(ligth,OUTPUT);
   /*-------------SENSOR 0----------------------*/

    tcaselect(0);

    if (! sensor0.begin_I2C(0x0C)) {          // hardware I2C mode, can pass in address & alt Wire
    Serial.println ("No sensor 0 found ... check your wiring?");
    
   }
   else{
   Serial.println("  S0 ok");
    }
    sensor0.setGain(MLX90393_GAIN_5X);
    sensor0.setResolution(MLX90393_X, MLX90393_RES_17);
    sensor0.setResolution(MLX90393_Y, MLX90393_RES_17);
    sensor0.setResolution(MLX90393_Z, MLX90393_RES_16);
    // Set oversampling
    sensor0.setOversampling(MLX90393_OSR_3);

  // Set digital filtering
    sensor0.setFilter(MLX90393_FILTER_7);
   /*---------------SENSOR 1----------------------------------*/
 
    tcaselect(1);
    delay(50);
       if (! sensor1.begin_I2C(0x0C)) {          // hardware I2C mode, can pass in address & alt Wire
    Serial.println("No sensor 1 found ... check your wiring?");

   }
   else{
  Serial.println("  S1 ok");
    }
    sensor1.setGain(MLX90393_GAIN_5X);
    sensor1.setResolution(MLX90393_X, MLX90393_RES_17);
    sensor1.setResolution(MLX90393_Y, MLX90393_RES_17);
    sensor1.setResolution(MLX90393_Z, MLX90393_RES_16);
  sensor1.setOversampling(MLX90393_OSR_3);
  sensor1.setFilter(MLX90393_FILTER_7);
  
  /*-------------SENSOR 2--------------------------*/
     tcaselect(2);
    delay(50);
   if (! sensor2.begin_I2C(0x0C)) {          // hardware I2C mode, can pass in address & alt Wire
    Serial.println("No sensor 2 found ... check your wiring?");
   }
   else{
   Serial.println("  S2 ok");
    }
    sensor2.setGain(MLX90393_GAIN_5X);
    sensor2.setResolution(MLX90393_X, MLX90393_RES_17);
    sensor2.setResolution(MLX90393_Y, MLX90393_RES_17);
    sensor2.setResolution(MLX90393_Z, MLX90393_RES_16);
    sensor2.setOversampling(MLX90393_OSR_3);
    sensor2.setFilter(MLX90393_FILTER_7);
 
    /*-------------SENSORE 3--------------------------*/
     tcaselect(3);
    delay(50);
   if (! sensor3.begin_I2C(0x18)) {          // hardware I2C mode, can pass in address & alt Wire
    Serial.println("No sensor 3 found ... check your wiring?");
   }
   else{
    Serial.println("  S3 ok");
    }
    sensor3.setGain(MLX90393_GAIN_5X);
    sensor3.setResolution(MLX90393_X, MLX90393_RES_17);
    sensor3.setResolution(MLX90393_Y, MLX90393_RES_17);
    sensor3.setResolution(MLX90393_Z, MLX90393_RES_16);
    sensor3.setOversampling(MLX90393_OSR_3);
    sensor3.setFilter(MLX90393_FILTER_7);

     /*-------------SENSORE 4--------------------------*/
     tcaselect(4);
     delay(50);
     if (! sensor4.begin_I2C(0x0C)) {          // hardware I2C mode, can pass in address & alt Wire
     Serial.println("No sensor 4 found ... check your wiring?");
     }
     else{
   Serial.println("  S4 ok");
     }
     sensor4.setGain(MLX90393_GAIN_5X);
     sensor4.setResolution(MLX90393_X, MLX90393_RES_17);
     sensor4.setResolution(MLX90393_Y, MLX90393_RES_17);
     sensor4.setResolution(MLX90393_Z, MLX90393_RES_16);
     sensor4.setOversampling(MLX90393_OSR_3);
    sensor4.setFilter(MLX90393_FILTER_7);
  
  
};

In the void loop, for now, i did not write anything but obviously i am interested in reading in the loop the parameters of each of the four sensors for all 8 mux channels.

There reason why in the loop i am still not writing anything is that even with the following code in the setup, I am seeing the led flashing red 8 times as in memory leak.
Do you have any suggestions on how to improve the firmware to avoid such problem and to write it in a more efficient way?

2

It's impossible to say from just the code above. I'd try simplifying the code to only read one sensor from loop and see if that makes a difference.

When you implemented it in loop, what did the code look like? You should only switch the TCA to the right port and get the measurement again, not initialize the chip again.