Steel Soldiers now has a few new forums, read more about it at: New Munitions Forums!
Microsoft MSN, Live, Hotmail, Outlook email users may not be receiving emails. We are working to resolve this issue. Please add support@steelsoldiers.com to your trusted contacts.
I've heard nothing but pain from Red River rebuilds. I don't have one, and no axe to grind, but I used to see people actively seek out Red River rebuilds. Am I just seeing the bad news, or are these ones to avoid?
And for those doing the battery crimps, BUY NEW ONES!!! The draw it takes will...
HA! Nope, it looks like Simp is helping me out by getting it of NC, and then at least to Memphis, maybe more. Sadly, the MINI probably couldn't do this one (well not rated for it...)
My plan exactly. CO which is probably just as hot in the summer, but without the humidity. A few years ago we...
Hmm, Im not sure now. I always thought no, but I guess I should draw it out. Got a long plane ride to think it over. I think 74M was going to try that too, hey, where did he go with is one. :-)
Both good basic websites on CAN communication and specs.
https://barrgroup.com/Embedded-Systems/How-To/Introduction-SAE-J1939
https://www.kvaser.com/about-can/higher-layer-protocols/j1939-introduction/
They reference a broadcast network. I'll check to see if I'm listening on the CAN shield...
Well normal CAN should speak up without being asked, but I guess it's possible. No Dana documentation has ever said how it communicates on either protocol, or even if it will, it's just a hunch based off the pin outs. I'll keep digging. And it might be call Dana to see if someone way back...
Cool, thanks. SO it looks like its CAN, but nothing is being transmitted. I fear that the flash is not supporting CAN. Unless we can figure out anything else, this might be a bust...
Well, the DANA does nothing out of the J1708, but has a nice waveform out of the J1939 ports. I have a CAN shield, but doesn't seem to be reading it. Sigh.
J1939 is 2.45V on the multimeter
I found the following on a J1939 site:
Summary:
In the dominant state:A typical CAN_H is about 3.5V...
Probe is 100% on the test point. Nice and square waves, all trimmed up with the probe adjust. I think there isn't anything on the Eaton's. Headed to go grab the DANA from the garage (and try the Arduino code with just a pulled LOW). It's 70 degrees out here in Colorado. Need the make the...
I can't get that waveform back, and that doesn't look like data to me. I am testing on an old Eaton, as that's all I have back at the house. I'll try to grab the DANA today / tomorrow, before I go on work travel.
For what its worth, I get with a multimeter
100mV out of pin N - J1708B
1mv...
Yeah, good old YouTube, I've poured through a bunch of them and have the actual manual, so have read and digested them all, and played with the scope a couple of times as well. My triggers are the only confusing part so far (too many options there), but does have Auto. I left my harness up by...
Yeah, I was considering that lately, it would at least give me a bunch of error codes I could immediately deal with. I have the pin outs, so not a bad idea. I was hoping this would be easier and quicker, and with no idea the signal, I should have started with a scope. I really thought I would...
Hulk, yes the Arduino has 2 serials. Serial is the USB, and Serial1 is the TX and RX on the board. So when we enable serial, I can see the output across a terminal like screen right from the USB that is powering the Arduino. The default for both serials is 8N1, so all good there. Its on an...
Well, I tested, and I think I have the wrong code. I think the instructional is dead wrong. I am only trying to receive, so I really don't need to transmit EVER.
Here is the code. I think this code (which is entitled The SAE J1708/J1587 Monitoring Sketch) is backwards. I believe that using...
Well, i resorted to research and multimeters, until I can get up to the shop and scope out the CAN connection on my "new" Dana. I hit the J1708 connection with a multimeter. 47k. Hmm. There is something there. A diagram confirmed it.
I then checked my Max485 --> arduino pages and I...
I bought an old school oscilloscope to scope the J1708 / CAN connections out. Should be here Monday. I also have a couple of things to check with an Ohm meter to be 100% sure that they terminations are correct.