Control Nicla from an Asset Tracker/Samd51 through eslov/I2C ... Example not working for me

Official Hardware Nicla Family Nicla Sense ME
1

Hello,

The goal is to control the Nicla Sense ME (acting as slave) via an Asset Tracker/Samd51 (acting as master) via the I2C bus.

I'm trying the example: "Control Nicla from an arduino board through eslov" seen on this page:
nicla-sense-me-fw

When I run it I don't see any data. I can see nothing in the Arduino IDE serial monitor (unless I plug both of the boards into a COM port).

These are the boards I have:
samd51
MicroMod Asset Tracker Carrier Board
Nicla Sense ME

I used the Arduino IDE 2.0.1 to compile and upload the programs to the boards.

I have the two boards connected by the qwiic connector from the Asset Tracker. The Asset Tracker/Samd51 are powered by a USB cable plugged into my computer. The Nicla Sense ME is powered by the qwiic connector from the Asset Tracker (I checked the connections for power/ground/SDA and SCL with my multimeter).

I compiled and uploaded the App.ino sketch to the Nicla Sense ME (using a COM port). Here is the code:

#include "Arduino.h"
#include "Arduino_BHY2.h"

// Set DEBUG to true in order to enable debug print
#define DEBUG false

void setup()
{
#if DEBUG
  Serial.begin(115200);
  BHY2.debug(Serial);
#endif

  BHY2.begin(NICLA_I2C);
}

void loop()
{
  // Update and then sleep
  BHY2.update(100);
}

And I compiled and uploaded the accelerometer.ino code to the Asset Tracker board. Here is the code:

#include "Arduino.h"
#include "Arduino_BHY2Host.h"

SensorXYZ accel(SENSOR_ID_ACC);

void setup()
{
  // debug port
  Serial.begin(115200);
  while(!Serial);

  BHY2Host.begin();

  accel.begin();
}

void loop()
{
  static auto printTime = millis();
  Serial.println("loop()");
  BHY2Host.update();

  if (millis() - printTime >= 1000) {
    printTime = millis();
    Serial.println(String("Acceleration values: ") + accel.toString());
  }
}

Does anyone have any ideas on this? I'm fairly new to programming devices like this.

Thanks for any help.

Regards,
...John

2

In order to make all relevant information available to any who are interested in this subject, I'll share a link to the related discussion here:

1 Like
3

An update.

I found that when I had the Nicla Sense plugged into the COM port everything worked, i.e. I2C communicated. This is a mystery to me, because we want to power the Nicla Sense through the Asset Tracker's qwiic cable.