Logging Serial Data

kbuckham · Post by **kbuckham** » Tue Feb 12, 2013 7:02 pm

How easy would it be for us to log data from a serial input? I am in the process of getting my engine computer to spit out it's real time logging into serial data. I would really like to log the Race Capture Pro and engine computer data once and ideally in Race Capture Pro.

How easy would this be to do? I have lots of parameters I care about logging some of which are not easily available as electrical signals externally like load and pressure indices to the speed density maps, boost target, knock values, knock based retard, and fuel trims. Many other values are also available through this that I could tap externally but this list is very long including such items as manifold pressure, AIT, throttle position, RPM, coolant temp, oil temp, fuel pressure, and wideband O2.

I am a software guy so I don't mind coding something up on either side of the connection. Either to get the data into a format for Race Capture Pro, or work at extending Race Capture Pro to consume the data.

I do realize that there will be some delay and obviously a bandwidth limitation (samples / second) over a serial interface even running at 115,200 or 250 kbps.

I can't wait to get my "Data Junkie" device! I've only become more excited about this product since I first signed up! I missed out on the mobile app + bluetooth but I'll be getting one of those once they are available. Thanks again!!!

Post by **brentp** » Tue Feb 12, 2013 8:38 pm

Hi kbuckham,

Thanks for supporting the project!

Next to the socket for the GPS module is the connection we use for the telemetry connection, bluetooth, or something else.

that something else could be an integration between Race Capture and your ECU - if you're comfortable writing in C code you should be able to write the code that queries the ECU, fetches the values you want, and logs the data.

Hooks in the Lua scripting - like for creating virtual , calculated channels may also be used as part of this solution.

Hope this helps- but yes, basically these types of things will be possible with RaceCapture/Pro.

kbuckham · Post by **kbuckham** » Wed Feb 13, 2013 12:57 am

Perfect! Is there a way I can get started on building something soon or will that be after the general release? I'm not looking for special access, I'm just curious.

Post by **brentp** » Wed Feb 13, 2013 10:52 pm

We will be making the software / hardware open source on the fulfillment of the Indiegogo campaign- not much information other than what we have in our existing documentation.

I'm sure you could write the base C algorithms that parses the ECU's data stream outside of RaceCapture, then you can snap it in (more or less) when you receive the hardware and source code!

andylaurence · Post by **andylaurence** » Tue Apr 30, 2013 11:11 am

Would this have to be done in C? I'm no programmer, but the ECU on my GSXR engine has a TTL serial output that can output diagnostic data from every sensor. It'd be great to be able to log that data. It's documented on the ECU Editor forums.

Post by **brentp** » Tue Apr 30, 2013 1:55 pm

We have routines for reading / writing the serial port in Lua. picking one over the other depends on the complexity and speed required (as with anything)

andylaurence · Post by **andylaurence** » Tue Apr 30, 2013 2:06 pm

I'm mostly interested in RPM, gear selected, clutch position and throttle position. RPM will most likely also come in through a pulse input (there's a separate output from the ECU for that), gear selection only needs to be 1-2Hz and the other two can be ~10Hz for reasonable resolution.