No response from MS5637

[spinoza1791]

I have two MS5637 Qwiic Pressure components being tested. I've tried both my SparkFun Qwiic Micro and my SparkFun Thing Plus to Qwiic connect to either MS5673 Qwiic Pressure sensor with no response (have tried multiple cables). After installing this library, I am using the included basic Arduino sketches for the MS5637 to no avail. From debugging, it seems to get stuck at: " if (barometricSensor.begin() == false)"

#include "SparkFun_MS5637_Arduino_Library.h"

MS5637 barometricSensor;

void setup(void) {
Serial.begin(9600);
Serial.println("Qwiic Pressure Sensor MS5637 Example");

Wire.begin();

if (barometricSensor.begin() == false)
{
Serial.println("MS5637 sensor did not respond. Please check wiring.");
while(1);
}
}

void loop(void) {

float temperature = barometricSensor.getTemperature();
float pressure = barometricSensor.getPressure();

Serial.print("Temperature=");
Serial.print(temperature, 1);
Serial.print("(C)");

Serial.print(" Pressure=");
Serial.print(pressure, 3);
Serial.print("(hPa or mbar)");

Serial.println();

delay(10);
}

[nseidle]

Weird. I've got it working on SAMD21, Uno and Artemis.

Are you meaning to use SerialUSB.print?

#include <Wire.h>

#include "SparkFun_MS5637_Arduino_Library.h"

MS5637 barometricSensor;

void setup(void) {
SerialUSB.begin(9600);
SerialUSB.println("Qwiic Pressure Sensor MS5637 Example");

Wire.begin();

if (barometricSensor.begin() == false)
{
SerialUSB.println("MS5637 sensor did not respond. Please check wiring.");
while(1);
}
}

void loop(void) {

float temperature = barometricSensor.getTemperature();
float pressure = barometricSensor.getPressure();

SerialUSB.print("Temperature=");
SerialUSB.print(temperature, 1);
SerialUSB.print("(C)");

SerialUSB.print(" Pressure=");
SerialUSB.print(pressure, 3);
SerialUSB.print("(hPa or mbar)");

SerialUSB.println();

delay(10);
}

[MattMills]

I suspect this is related to the I2C_ERR_CONTINUE error code that is in the newer ESP32 library (https://github.com/espressif/arduino-esp32/blob/371f382db7dd36c470bb2669b222adf0a497600d/cores/esp32/esp32-hal-i2c.h#L37) as I've been seeing that in a few projects.

[pepepper]

I have same problem on SONY spresense board and I found the workaround.
First, execute barometricSensor.begin() and let them failed(This is needed to set Wire instance to MS5637 instance. Otherwise program will crash.)
After that, execute barometricSensor.reset() and execute barometricSensor.begin() again.

The datasheet of MS5637 states "The Reset sequence shall be sent once after power-on ..." but this library doesn't do that.