Two TOF one MPU problem

hi there i am using two vl53l0x sensors and one mpu6050 , for each software (in the libraries examples) they work fine but i tried to hook them in one software things got ugly.
serial monitor would have printed vl53l0x values then mpu values after initiating but it seems mpu initiating segment contradict the vl53l0x one,

my question is : why this is happing and how can i get all the readings i want?
notes are: 1.i wired all components correctly (xshut for vl53l0x sensors on 8 & 9) mpu free
2. i2c scanner shows that vl53l0x 1 address is 0x29 and vl53l0x 2 is 0x31 and mpu is 0x68 so there is no address aliases
3. initiating segments for both components are bug free
4. serial monitor is stuck after initiating vl53l0x at ("starting") and then it keeps looping

my code is

#include "Adafruit_VL53L0X.h"
#include <Adafruit_MPU6050.h>
#include <Adafruit_Sensor.h>
#include <Wire.h>
// address we will assign if dual sensor is present
#define LOX1_ADDRESS 0x29
#define LOX2_ADDRESS 0x31
Adafruit_MPU6050 mpu;
// set the pins to shutdown
#define SHT_LOX1 8
#define SHT_LOX2 9

// objects for the vl53l0x
Adafruit_VL53L0X lox1 = Adafruit_VL53L0X();
Adafruit_VL53L0X lox2 = Adafruit_VL53L0X();

// this holds the measurement
VL53L0X_RangingMeasurementData_t measure1;
VL53L0X_RangingMeasurementData_t measure2;

/*
    Reset all sensors by setting all of their XSHUT pins low for delay(10), then set all XSHUT high to bring out of reset
    Keep sensor #1 awake by keeping XSHUT pin high
    Put all other sensors into shutdown by pulling XSHUT pins low
    Initialize sensor #1 with lox.begin(new_i2c_address) Pick any number but 0x29 and it must be under 0x7F. Going with 0x30 to 0x3F is probably OK.
    Keep sensor #1 awake, and now bring sensor #2 out of reset by setting its XSHUT pin high.
    Initialize sensor #2 with lox.begin(new_i2c_address) Pick any number but 0x29 and whatever you set the first sensor to
 */
void setID() {
  // all reset
  digitalWrite(SHT_LOX1, LOW);    
  digitalWrite(SHT_LOX2, LOW);
  delay(10);
  // all unreset
  digitalWrite(SHT_LOX1, HIGH);
  digitalWrite(SHT_LOX2, HIGH);
  delay(10);

  // activating LOX1 and resetting LOX2
  digitalWrite(SHT_LOX1, HIGH);
  digitalWrite(SHT_LOX2, LOW);

  // initing LOX1
  if(!lox1.begin(LOX1_ADDRESS)) {
    Serial.println(F("Failed to boot first VL53L0X"));
    while(1);
  }
  delay(10);

  // activating LOX2
  digitalWrite(SHT_LOX2, HIGH);
  delay(10);

  //initing LOX2
  if(!lox2.begin(LOX2_ADDRESS)) {
    Serial.println(F("Failed to boot second VL53L0X"));
    while(1);
  }
}

void read_dual_sensors() {
  
  lox1.rangingTest(&measure1, false); // pass in 'true' to get debug data printout!
  lox2.rangingTest(&measure2, false); // pass in 'true' to get debug data printout!

  // print sensor one reading
  Serial.print(F("1: "));
  if(measure1.RangeStatus != 4) {     // if not out of range
    Serial.print(measure1.RangeMilliMeter);
  } else {
    Serial.print(F("Out of range"));
  }
  
  Serial.print(F(" "));

  // print sensor two reading
  Serial.print(F("2: "));
  if(measure2.RangeStatus != 4) {
    Serial.print(measure2.RangeMilliMeter);
  } else {
    Serial.print(F("Out of range"));
  }
  
  Serial.println();
}

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

  // wait until serial port opens for native USB devices
  while (! Serial) { delay(1); }

  pinMode(SHT_LOX1, OUTPUT);
  pinMode(SHT_LOX2, OUTPUT);

  Serial.println(F("Shutdown pins inited..."));

  digitalWrite(SHT_LOX1, LOW);
  digitalWrite(SHT_LOX2, LOW);

  Serial.println(F("Both in reset mode...(pins are low)"));
  
  
  Serial.println(F("Starting..."));
  setID();
   if (!mpu.begin()) {
    Serial.println("Failed to find MPU6050 chip");
    while (1) {
      delay(10);
    }
  }
  Serial.println("MPU6050 Found!");

}

void loop() {
   
  read_dual_sensors();
  delay(100);
}

i don't get nether "Failed to find MPU6050 chip" nor "MPU6050 Found!" please help, and thanx in advance

1 post - 1 participant

Read full topic