Rank: Newbie
Groups: Registered
Joined: 6/18/2020(UTC) Posts: 3 
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I see in Settings -> System -> Advanced System Settings -> Advanced Functions a page for monitoring and setting PID data. It is clearly marked with a big WARNING to use at your own risk, so I know that this isn't intended to be used on a regular basis. However, I was able to successfully use it to read the data for the HPOP pressure PID on my T444e. Theoretically, could this be used for setting engine parameters? Again, I know this is NOT OFFICIALLY SUPPORTED and could render the ECM useless, but has anyone had success doing so? Risky.. I know... Edited by user Thursday, June 18, 2020 9:10:25 AM(UTC)
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Rank: Newbie
Groups: Registered
Joined: 6/22/2020(UTC) Posts: 8  Location: Oklahoma
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How did you go about doing the PID lookup, I have asked and not really got an answer.
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Rank: Administration
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Joined: 4/12/2014(UTC)
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Either query the internet, or join SAE and purchase their J1939 and J1708/J1587 documents.
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Rank: Newbie
Groups: Registered
Joined: 6/18/2020(UTC) Posts: 3
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Rank: Newbie
Groups: Registered
Joined: 6/22/2020(UTC) Posts: 8 Location: Oklahoma
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Originally Posted by: Mark  Either query the internet, or join SAE and purchase their J1939 and J1708/J1587 documents. I have already done that just want to know how to utilize the software to see if there are any more pids that can be accessed with your software
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Rank: Administration
Groups: Administrators
Joined: 4/12/2014(UTC)
Posts: 690
Was thanked: 12 time(s) in 10 post(s)
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Assuming you know the PGN or PID where the data you want is located and you know how the data is formatted into the PGN/PID, then you start monitoring that PGN or PID. If the PGN/PID is not returned or if the data returned is 0xFF then it is not being transmitted by the ECM. Note, you need to know the exact location in the PGN/PID and how many bits the data consumes. In most cases the data is on a byte boundary so looking for 0xFF is good enough. If the data is not on a byte boundary (eg. less than 8 bits), then you need to just look for those bits being all ones which indicates no data. If the data is not 0xFF then it is being transmitted and can become a candidate for addition to the App.
The easier way is to start monitoring the PGN/PID and take a screenshot of the returned data and send it to me along with what you're looking for and I can determine whether anything is being transmitted.
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Rank: Newbie
Groups: Registered
Joined: 6/18/2020(UTC) Posts: 3
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Great information Mark! Thank you! I hope to play around with the BlueFire a bit more sometime soon, probably this fall when some rain clouds roll in. I even got started on putting together a very basic HPOP monitor using the BlueFire API and included demo app. Very good of you folks to provide the API. Edited by user Monday, July 6, 2020 1:14:34 PM(UTC)
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Rank: Administration
Groups: Administrators
Joined: 4/12/2014(UTC)
Posts: 690
Was thanked: 12 time(s) in 10 post(s)
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Added a section in the Getting Started document titled 'Advanced Functions' that explains how to use the page.
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