Cheap CAN device for SW monitoring

[T3klock]

I was looking for something super cheap to monitor my gmlan sw bus while interacting with my Tech2. I never hear anyone talk about it, but this little guy works great!

https://www.amazon.com/dp/B0BSKSQPPZ?re ... asin_title

With the candlelight firmware it supports native socketcan which is what I was looking for so I can use can-utils on my linux box for monitoring. I just grounded can-L and connected can-H to one of the green low speed gmlan wires coming out of my BCM. After setting the baud rate to 33333 and bring up the interface it seems to work perfectly. If anyone is wanting a cheap monitoring device, I can't see how you can beat $12 bucks!

[ironduke]

You can use an elm to do the same thing, I have a couple of those laying around collecting dust, I'm thinking a lot of people do, lol..
use 6@14, ground can low and set baud to 33,333..

[T3klock]

You can use an elm to do the same thing, I have a couple of those laying around collecting dust, I'm thinking a lot of people do, lol..
use 6@14, ground can low and set baud to 33,333..

Right, I have a couple of elms. One that comes in the blue case and one in the black case. I feel like this IC works a little smoother. At least in linux and on a raspberry pi.

[T3klock]

You can use an elm to do the same thing, I have a couple of those laying around collecting dust, I'm thinking a lot of people do, lol..
use 6@14, ground can low and set baud to 33,333..

I just noticed you said 6 and 14. On my 2010 Cobalt pin 1 is the SW GMLAN. Is that not the case on newer gm's?

[antus]

6 and 14 are usually 500k high speed.

[ironduke]

You can use an elm to do the same thing, I have a couple of those laying around collecting dust, I'm thinking a lot of people do, lol..
use 6@14, ground can low and set baud to 33,333..

I just noticed you said 6 and 14. On my 2010 Cobalt pin 1 is the SW GMLAN. Is that not the case on newer gm's?

Sorry, didn't explain fully.. You wire pin 14(can High) to pin 1, pin 6(can Low) to ground, set the baud to 33.3k and you can talk on the low speed pin 1 bus. I used to have an elm with a DPDT switch wired in to switch from high speed 6@14 to gm lan pin 1.. Once I figured out how to use the GM mdi I quit using elm's..

[T3klock]

You can use an elm to do the same thing, I have a couple of those laying around collecting dust, I'm thinking a lot of people do, lol..
use 6@14, ground can low and set baud to 33,333..

I just noticed you said 6 and 14. On my 2010 Cobalt pin 1 is the SW GMLAN. Is that not the case on newer gm's?

Sorry, didn't explain fully.. You wire pin 14(can High) to pin 1, pin 6(can Low) to ground, set the baud to 33.3k and you can not talk on the low speed pin 1 bus. I used to have an elm with a DPDT switch wired in to switch from high speed 6@14 to gm lan pin 1.. Once I figured out how to use the GM mdi I quit using elm's..

I'm running can-H on my device to pin 1 on the DLC connecter in my car and connecting can-l to the ground on my device. I'm also connecting the ground on my device to pin 5 on the DLC. What do you mean you can not talk on the low speed pin 1 bus?

[ironduke]

I just noticed you said 6 and 14. On my 2010 Cobalt pin 1 is the SW GMLAN. Is that not the case on newer gm's?

Sorry, didn't explain fully.. You wire pin 14(can High) to pin 1, pin 6(can Low) to ground, set the baud to 33.3k and you can not talk on the low speed pin 1 bus. I used to have an elm with a DPDT switch wired in to switch from high speed 6@14 to gm lan pin 1.. Once I figured out how to use the GM mdi I quit using elm's..

I'm running can-H on my device to pin 1 on the DLC connecter in my car and connecting can-l to the ground on my device. I'm also connecting the ground on my device to pin 5 on the DLC. What do you mean you can not talk on the low speed pin 1 bus?

I guess I confuse easily, what are you trying to say? I can talk on the low speed pin 1, multiple ways.. I never said I or anyone else couldn't.. I was just pointing out a different way of doing it with hardware most people here already have on hand, nothing wrong with buying additional hardware and doing it your way.

[T3klock]

Sorry, didn't explain fully.. You wire pin 14(can High) to pin 1, pin 6(can Low) to ground, set the baud to 33.3k and you can not talk on the low speed pin 1 bus. I used to have an elm with a DPDT switch wired in to switch from high speed 6@14 to gm lan pin 1.. Once I figured out how to use the GM mdi I quit using elm's..

I'm running can-H on my device to pin 1 on the DLC connecter in my car and connecting can-l to the ground on my device. I'm also connecting the ground on my device to pin 5 on the DLC. What do you mean you can not talk on the low speed pin 1 bus?

I guess I confuse easily, what are you trying to say? I can talk on the low speed pin 1, multiple ways.. I never said I or anyone else couldn't.. I was just pointing out a different way of doing it with hardware most people here already have on hand, nothing wrong with buying additional hardware and doing it your way.

oh I guess you just misspoke but you said "set the baud to 33.3k and you can not talk on the low speed pin 1 bus." Anyway I'm still learning all this so when I hear some like that I just want to make sure I'm doing it right lol....

[ironduke]

I'm running can-H on my device to pin 1 on the DLC connecter in my car and connecting can-l to the ground on my device. I'm also connecting the ground on my device to pin 5 on the DLC. What do you mean you can not talk on the low speed pin 1 bus?

I guess I confuse easily, what are you trying to say? I can talk on the low speed pin 1, multiple ways.. I never said I or anyone else couldn't.. I was just pointing out a different way of doing it with hardware most people here already have on hand, nothing wrong with buying additional hardware and doing it your way.

oh I guess you just misspoke but you said "set the baud to 33.3k and you can not talk on the low speed pin 1 bus." Anyway I'm still learning all this so when I hear some like that I just want to make sure I'm doing it right lol....

Doh!!!!! Yeah... I definitely misspoke there!!! I looked back, read it to myself and still missed it!!! lmao..
Sorry about that!! Sorry to say you but sometimes I need things to be blatantly pointed out to me...