MS5xxx example does not work on my ESP8266 12E board

[kreativnix]

I have newly installed Arduino IDE v1.8.13 and downloaded the MS5xxx lib, as I remember from arduinolibraries.info but the example program Simple Server does not run.
I always get "Error connecting..." means can not connect to the sensor.
Because I am not a specialist with this breakout board and not that code master, could you help me what I could do ?
Regards Gerald

[Schm1tz1]

Hi Gerald,

Looks like the I2C-Connection is not working. I don't know all the details of your setup, but some ideas that might help:

• Please check hardware first:
  • are the cables you are using ok?
  • are you using the correct I2C pins for your chip? Please double-check the pinout.
• Start with the most simple example (i.e. Test)

If that still doesn't work, try to scan you I2C-Bus. There is a default I2C-Example from Arduino that performs a scan of all I2C-Addresses or use something like this.
It should find a device and give you the I2C-Address. If that still doesn't find a device, there is something not ok with the chip.

If it finds a device, perfect!
Next step: You have to check that the I2C-Address you are using is correct. I am using default addresses from devices from 2012/2013 in my examples. Sometimes manufacturers change these addresses depending on the version of the chip/board. If you find a different I2C-Address, you can simply set it in you code with the public method setI2Caddr(char aAddr) before using running the connect method.

Example:

MS5xxx sensor(&Wire);
sensor.setI2Caddr(0x42); // change the 0x42 to the I2C address that was found by your scan.

void setup() {
  Serial.begin(9600);
  if(sensor.connect()>0) {
    Serial.println("Error connecting...");
    delay(500);
    setup();
  }
}

Hope that helps - please let me know if that works. I really think the manufacturer changed the address as I could find some forks for the same chip with different address.

Cheers,
Roman

[Schm1tz1]

Hi @kreativnix - is there any update on this issue? From my point of view it can be only the I2C-Address and this is not a bug but something that needs to be configured. I have added information on how to change it.

[kreativnix]

Unfortunately it is not tht simple. Today I played a little around with the examples from the Library "MS5xxx-1.0.2" and I had always the connection Error 2, seems to be the sensor did not ack. Of course I tryed both addreses 0x76 and 0x77 (which was found by i2cdetect.ino. Then I found another library "MS5607-master" and tryed the example which first did not work, then I found a way to give it the address 0x77 and it worked !! SUCCESS! With exact the same setup and wiring. Best regard Gerald

…

On 25.07.20 13:50, Roman Schmitz wrote: Hi @kreativnix <https://github.com/kreativnix> - is there any update on this issue? From my point of view it can be only the I2C-Address and this is not a bug but something that needs to be configured. I have added information on how to change it. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#6 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAKZ72IPA57WVZW5LJ3MMVTR5LBH3ANCNFSM4OXQHDQQ>.

-- .................................................................... Gerald Pechoc Engineer for Telecommunications and Electronics email: gerald@pechoc.eu mobil: +43 680 215 15 19

[Schm1tz1]

Concerning the I2C-Address:
Thanks for the update. From the fork at ImperialSpaceSociety I can also see that obviously the default I2C address was changed by the manufacturer.

Interesting problem, seems a bit strange that is issue is rather new and was not observed before (or at least not reported). I am not aware of any differences using the ESP8266 Wire libraries that might cause this issue. I've been using it with ESP8266 and ESP32 for months without any problems. There must be some small difference in code or a different version of one of the libraries... I have to double-check what changes in code might cause this issue.

Questions @kreativnix: Is the MS5607-master the old version of this library or from a different project? Are you using a MS5607 or some different sensor?

[kreativnix]

My installation consists of: Wemos D1 mini pro MS5607 Software: Arduino IDE 1.8.13 Lib: MS5xxx-1.0.2 did not work with none of the both i2C Addresses MS5607-master (seem to be from 09/2018) Here I had to look how to change the i2C address, then it worked fine. Best regards Gerald

…

On 01.08.20 20:25, Roman Schmitz wrote: Concerning the I2C-Address: Thanks for the update. From the fork at ImperialSpaceSociety <ImperialSpaceSociety@3dad725> I can also see that obviously the default I2C address was changed by the manufacturer. Interesting problem, seems a bit strange that is issue is rather new and was not observed before (or at least not reported). I am not aware of any differences using the ESP8266 Wire libraries that might cause this issue. I've been using it with ESP8266 and ESP32 for months without any problems. There must be some small difference in code or a different version of one of the libraries... I have to double-check what changes in code might cause this issue. Questions @kreativnix <https://github.com/kreativnix>: Is the MS5607-master the old version of this library or from a different project? Are you using a MS5607 or some different sensor? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#6 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAKZ72OAMZ6NQL72K46VT3LR6RM2XANCNFSM4OXQHDQQ>.

-- .................................................................... Gerald Pechoc Engineer for Telecommunications and Electronics email: gerald@pechoc.eu mobil: +43 680 215 15 19