Signal K•4w ago

Tony - Is there a way to capture PGNs and debug...

Is there a way to capture PGNs and debug additional fields? I am connected to a Mercury CAN gateway for an outboard. I am getting some of the parsed values from PGN 127489 (Dynamic Engine Parameters) but not everything is being converted. I would like to be able to see each update and if parsing fails or is skipped. There is a rapid update on that PGN, but only a handful of conversions happening. I expect voltage, coolant temperature, oil pressure, oil temperature, etc. but only getting fuel rate, fuel pressure, and alarm states. I am pretty sure this is an issue with canboat library but I have no idea how to confirm this. What is the best solution for developers?

7 Replies

Scott Bender•4w ago

First step is to turn on data logging Then you get the raw n2k data You can use canboatjs to decode individual items I can take a look in detail if you need it

TonyOP•4w ago

Turn on data logging for what? A Signalk event? I see several for canboatjs, like signalk-server:events:connection:N2K:canboatjs:unparsed:data

Scott Bender•4w ago

Data logging is in the Data Connection settings Then you will get log files in ~/.signalk

TonyOP•4w ago

Ah makes sense. Thanks I'll try this Failing to parse the log entires. I tried using the doc example code but it's failing

const FromPgn = require("@canboat/canboatjs").FromPgn;
const fs  = require('fs');
const path = require('path');

const parser = new FromPgn();

const fileLines = fs.readFileSync('./skserver-raw_2025-01-28T14.log');
const lines = fileLines.toString().split('\n');

lines.forEach((line) => {
    const pgn = line.split(';')[2]
    try {
        if(pgn.split(',')[2] === '127489'){
            const json = parser.parseString(pgn)
            if(json){
                console.log(JSON.stringify(json))
            }
        }

   } catch(e){
    //do nothing
   }
  
});

const FromPgn = require("@canboat/canboatjs").FromPgn;
const fs  = require('fs');
const path = require('path');

const parser = new FromPgn();

const fileLines = fs.readFileSync('./skserver-raw_2025-01-28T14.log');
const lines = fileLines.toString().split('\n');

lines.forEach((line) => {
    const pgn = line.split(';')[2]
    try {
        if(pgn.split(',')[2] === '127489'){
            const json = parser.parseString(pgn)
            if(json){
                console.log(JSON.stringify(json))
            }
        }

   } catch(e){
    //do nothing
   }
  
});

TonyOP•4w ago

skserver-raw_2025-01...

TonyOP•4w ago

Using this code example https://github.com/canboat/canboatjs?tab=readme-ov-file#parse-input-from-the-actisense-ngt-1-or-ikonvert-string-formats Ah shoot premature issue. I just had to upgrade the package version to latest

Scott Bender•4w ago

just use the comman line tools instructions in the git README use analyzerjs

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Tony - Is there a way to capture PGNs and debug...

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