Logger Protocol

rubmack · **Joined:** Sun Feb 04, 2018 4:15 am **Posts:** 5

Hi guys,
i am looking to build a display similar to this one: http://www.romraider.com/forum/viewtopi ... =15&t=9638

I want to feed the signals to the Romraider Logger, but i am not able to write a Plugin myself. And there are similar/suitable Plugins already. Are the Protocols of the Plugins documented somewhere?

dschultz · **Posted:** Wed May 27, 2020 1:43 pm

Every manufacturer has their own protocol and most document them on their support sites.
Plugin code is here: https://github.com/RomRaider/RomRaider/ ... r/external

rubmack · **Joined:** Sun Feb 04, 2018 4:15 am **Posts:** 5

Hi,
I found the code already, but I am not able to extract the Protocol from the code. I can program embedded systems, but I never used object oriented programming languages. Maybe someone can guide me a little bit.

I am pretty interested in the plugin for the mrf stealth gauge, because that is basically what I want to copy. Except I want to use an stm32 micro-controller, instead of an Arduino.
The Propertys of the serial communication are pretty simple to read:
Baudrate: 9600
Databits: 8
Parity: no
Stopbits: 1

But after this point, I am pretty helpless. I assume the communication relies on Ascii codes. And I found an enumeration list for the specific Sensors, so I would assume something like this:
Byte0= Type of Sensor (0 - 6)
Byte1= Some kind of seperator, maybe a comma?
Byte2 - 5= The data. E.g for the AFR 14.7, where every character is one byte.

With this, is it possible to set the transmission frequency? Like increase the frequency for Lambda and decrease it for Oil Temperature?

Is there any kind of initialization routine?

Can someone confirm that, and/or point me in the right direction?
Thank you in advance.

dschultz · **Posted:** Thu May 28, 2020 8:08 am

The MRF plugin is simply a comma separated string of ASCII characters each representing a float value for the sensors reported.
viewtopic.php?t=6179

If you duplicate the same sensors and the same serial protocol you can read your system using the same plugin.

rubmack · **Joined:** Sun Feb 04, 2018 4:15 am **Posts:** 5

Perfect, thank you very much. I will try this soon.

Are there any plans to support Can devices? This would be a pretty simple and versatile way, to feed sensor data to the RR Logger.

Best regards

dschultz · **Posted:** Thu May 28, 2020 9:05 am

CAN would be a future development and require a CAN adapter at the logging computer, such as https://www.fischl.de/usbtin/

rubmack · **Joined:** Sun Feb 04, 2018 4:15 am **Posts:** 5

To test the Plugin, i try to send serial data through a simulated com port.
I send the following data repeatedly:
300.4,1200,30,30,14.6,35,120
The com settings are 9600baud, 8bit, 1 stop bit and no parity.

But the Logger just show zeros. I also tried to add a comma to the end of the sequence. I added the debug file of the Logger. I cant see anything conspicuous there.

What am I doing wrong?

Best regards

dschultz · **Posted:** Mon Jun 01, 2020 8:40 am

The log shows no data coming in the COM port. Why a simulated port and not a real port?
If data comes in the port it will be checked and reported by this code.

Code:

String response = connection.readLine();
if (isNullOrEmpty(response)) continue;
LOGGER.trace("MRF Stealth Gauge Response: " + response);

readLine means:
A line is considered to be terminated by any one of a line feed ('\n'), a carriage return ('\r'), or a carriage return followed immediately by a linefeed.

rubmack · **Joined:** Sun Feb 04, 2018 4:15 am **Posts:** 5

I chose the virtual com port, because it is way easier.
The \n at the end of the line was the solution.

Why is the baudrate 9600 bits/s? What is the limitation for this connection?

Best regards

dschultz · **Posted:** Thu Jun 04, 2020 5:06 pm

9600baud is the rate the MRF device sends data at.

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