Tom Schanandore

So I think that I’m out of luck on this sensor, based upon what you just said. I’ll have to abandon this sensor.

thank you for all your help and sorry again for the miscommunication.

I apologize for not saying that from the get go. My knowledge with all of this is rather limited, to be honest. I thought you were just trying to talk between the Sensor and the MayFly. The current library that I am using is on GitHub at <https://github.com/NorthernWidget-Skunkworks/Walrus_Library&gt;

The previous is the code that they gave me to begin with. It does work when directly connected to the MayFly and Arduino Uno. IT does also work on the Arduino Uno (5v) when using the 3m cable.

// Include the Walrus library
#include "Walrus_I2C.h"

// Declare variables -- just as strings
String header;
String data;

// Instantiate class
Walrus myWalrus;

void setup(){
    // Begin Serial connection to computer at 38400 baud
    Serial.begin(38400);
    // Obtain the header just once
    header = myWalrus.getHeader();
    // Print the…

[Read more]

They are good values and slightly vary. I have verified the output with the MPL115A2 sensor that I have and the values are the same.

They said that the 3m cable works great with their data loggers on I2C protocol, but yes it would make sense to use an RS485 to just be sure that the signal won’t be lost over the length.

Is there anything strange about the fact that the walrus sensor does output good values when I have it connected directly (via grove connector) to the MayFly? And of course it is only when I connect it via the 3m cable that the values do not output.

It sounds as if Northern Widget is not willing at this time to do any more trouble shooting with…[Read more]

See the link below to the firmware that they say is on the sensor. It is probably the same firmware you are looking at. I am requesting also the I2C registers and commands.

https://github.com/NorthernWidget-Skunkworks/Project-Walrus/tree/master/Firmware/Walrus_I2C_5BA

I will contact Northern Widget to see if they will send the firmware that they uploaded for verification on this end.

Ran the second bit of code and the scanner code. The scanner codes serial output is at the end.

See attached

It’s reading something, which is a lot better than before, as it read nothing before.

I uploaded the code and the serial output is attached.

I see. Do I simply upload to the mayfly with the sensor attached? Or is this code to be added in somewhere in my overall code (PlatformIO)?

I am assuming that this is a firmware to be uploaded to the sensor?

I only paid for the one, which was not housed. That one I will keep. The other four they just sent, without first figuring out the problem. If they don’t work I will simply send the four back. Yes, frustrating. Two months of not getting anywhere and now I need to make the decision to figure this out on my own or switch to a different sensor. Maybe…[Read more]

Much appreciated. There are a few trouble shooting things that I did that may be difficult to explain over the forum. If you would like to discuss my phone is 701-390-2040. These trouble shooting thing did show some interesting results. Any help to get them to work would be great, since I have four ready to go that they sent and I was planning to…[Read more]

I am assuming that the firmware also has something to do with making the sensor signal work over the length of the 3m cable? The sensor does work when attached directing to the I2C port (via. grove cable) on the Mayfly at 3.3v. That’s great, but as you know, I need to run that sensor into the stream.

Honestly my understanding of all this is pretty basic, but I understand that the firmware is very important. I left it up to Northern Widget to upload the appropriate firmware to the sensor before they sent the sensors, so that that process would be streamlined. I did read through their documentation on the firmware and, as you stated before, they…[Read more]

Thanks Sara,

I have been working with Bobby and Andy Wickert over there on this and they gave me sensors with the appropriate firmware installed already. I did not have to install any firmware. It was just suppose to be hooked up and ready to work. I didn’t know if anyone in the community here was able to get a walrus sensor to work on the…[Read more]