Portenta H7 and VL53L5CX

Robotics
1

Has anyone tried to use this combination? I have the sensor plugged into the ESLOV port on the H7, and it powers up. However, trying to run any of the example skletches fails. I get the first prints to the serial port, but nothing comes backl from the sensor, so I do not know whether the sensor is bad or good.

2

That sensor uses a ton of RAM (usual suspect for this type of thing), but the H7 has way more than enough!

Did you specify to use i2c0 in the code?

I’ll see if I can find my Portenta over the weekend…

3

Another thing is to ensure you are using the correct ‘wire’ (wire vs wire1)

4

I am using the ESLOV conntector I2C, which is, as far as I can tell, the default I2C bus.

8-Dale

5

Try this code and post the results:

#include <Wire.h>

void setup() {
  Serial.begin(115200);
  while (!Serial); // Wait for Serial Monitor

  // Initialize the ESLOV I2C bus (Wire)
  Wire.begin(); 
  
  Serial.println("ESLOV I2C Scanner starting...");
}

void loop() {
  byte error, address;
  int nDevices = 0;

  for (address = 1; address < 127; address++) {
    Wire.beginTransmission(address);
    error = Wire.endTransmission();

    if (error == 0) {
      Serial.print("I2C device found at address 0x");
      if (address < 16) Serial.print("0");
      Serial.println(address, HEX);
      nDevices++;
    }
  }

  if (nDevices == 0) Serial.println("No I2C devices found\n");
  else Serial.println("Scan complete\n");

  delay(5000); 
}
6

My VL53L5CX is not being detected on the I2C bus. :frowning: I am using the correct I2C bus for the ESLOV connector.

7

My VL53L5CX sensor is detected on thje I2C bus when connected by the other connector, but it is not working with any sample sketch I have tried.

8

What’s showing in the serial monitor?

9 
SLOV I2C Scanner starting...
I2C device found at address 0x29
Scan complete

There is no sensor output from any demo sketch I have tried.
10

Ok, last thing - do you have any other MCUs or i2c/qwiic devices you can test with to isolate the issue?

11

I have several I2C capable MCUs, but I am not sure any of the others I have could handle the VL525CX. I have an Arduino Nano BLE Sense, an Arduino Portenta C33, an Arduino Nano RP2040 Connect, and some others. I would have to solder headers to the VL53L5CX in order to connect it to all but the C33 board. None of my other boards have STEMMA/QUIIC connectors.

12

Darn - ok, well it’s either a defective sensor or an unviable combo… and I’m out of ideas. We can send out a replacement unit to cover our side of things. Was it purchased from us? If so head over to Return Policy - SparkFun Electronics (contact vendor if purchased elsewhere) and we’ll get ya squared away

13

I only purchase SparkFun stuff from SparkFun. Yes, I did buy it direct, and it was the last one available at the time.

8-Dale