Problems with Duet3 Expansion 3HC Connecting

[Phaedrux]

@feynman137 said in Problems with Duet3 Expansion 3HC Connecting:

RepRapFirmware for Duet 3 MB6HC version 3.1.1 running on Duet 3 MB6HC v1.01 or later (SBC mode)

Can you try updating your pi and firmware with sudo apt update sudo apt upgrade?

@feynman137 said in Problems with Duet3 Expansion 3HC Connecting:

except M98 P"config.g" which didn't seem to run for me.

That's actually normal with an SBC since there are no network commands in there to echo back, and if you don't have any other syntax errors.

@feynman137 said in Problems with Duet3 Expansion 3HC Connecting:

                                                                                                                            M122 B1                                                                                                                                                                            Error: M122: Response timeout: CAN addr 1, req type 6024, RID=6                                            

Can you add a G4 S5 command to the start of your config.g?

What lights do you see on your 3HC?
How do you have the CAN bus wired?
Do you have the jumpers fitted?

https://duet3d.dozuki.com/Wiki/Duet_3_Expansion_Hardware_Overview
https://duet3d.dozuki.com/Wiki/Duet_3_Expansion_3HC_Wiring_Diagram
https://duet3d.dozuki.com/Wiki/CAN_connection

[dc42]

@feynman137 have you ever had communication working between the main board and the expansion board? If not, and the expansion board status LED is blinking rapidly, it probably means faulty CAN wiring. In particular, check that the RJ11 cable is wired straight through. Many RJ11 cables using flat cable are crossed.

Also check that the address switches on the expansion board are correctly set for address 1.

[Feynman137]

@dc42 @Phaedrux

Alright so I went through the update process. Actually hadn't even connected to the Pi yet and gone through the process of allowing SSH ..etc. Upon setting up the Pi the software auto scanned for new updates and downloaded much newer firmware versions for expansion boards. Before this I think the board's firmware was showing last modified in Feb 2021 now it shows June 2021.

I also did the sudo apt upgrade/update just to verify, but no new updates were found during this.

Here is a link to the exact cable I purchased: https://www.amazon.com/gp/product/B07WJB5DS4/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1

The expansion board's CAN IN port is what I have connected to the mainboard and the light to the left of this port "DIAG" is constantly blinking several times a second. Also yes I have verified that the address is set to 1 and that both jumpers are on the pins since there are no other CAN boards connected to it.

M122 B1 still returns:

M122 B1
Error: M122: Response timeout: CAN addr 1, req type 6024, RID=8

[dc42]

@feynman137 I think that cable has crossed connections. See the photos of good and bad CAN cables at https://duet3d.dozuki.com/Wiki/CAN_connection#Section_Example_of_a_good_cable and compare them with yours. Click on the photos to expand them.

[fcwilt]

@feynman137 said in Problems with Duet3 Expansion 3HC Connecting:

https://www.amazon.com/gp/product/B07WJB5DS4/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1

Yout link does not work unless cut and pasted.

Please check your link tag.

Thanks.

Frederick

[Feynman137]

@dc42

Do you have a link to a recommended cable? I see the link you sent but I am not sure how to search for a cable with these specs.

[Feynman137]

@dc42 the link says sometimes these cables are referred to as "High Speed ADSL cables" I found this product that matches that description... Is this something that will work?

https://www.amazon.com/G-PLUG-Internet-Broadband-Router-Telephone/dp/B08YS3KVZ1/ref=sr_1_1_sspa?dchild=1&keywords=High+Speed+ADSL+cables&qid=1625367335&sr=8-1-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEyQ1lRUUhBRTI4WTY2JmVuY3J5cHRlZElkPUEwNzY5Mzg0MTFMTkFVSzhUWkhYMCZlbmNyeXB0ZWRBZElkPUEwMzAwNDUzMVoxT1BFNFlVTjFENiZ3aWRnZXROYW1lPXNwX2F0ZiZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=

[dc42]

@feynman137 said in Problems with Duet3 Expansion 3HC Connecting:

https://www.amazon.com/G-PLUG-Internet-Broadband-Router-Telephone/dp/B08YS3KVZ1

The links you post don't work for me, but they work if I delete /ref= and all that follows.

The image on that listing shows a cable wired-straight through, so if that is to be believed then it should be OK. However, pre-made cables using round cable instead of flat cable are usually a better bet, because round cables are usually twisted pair. So I suggest you search for "high speed dsl cable rj11" and pick a round cable.

Did you establish that your existing cable has crossed connections?

[Feynman137]

@dc42 I appologize about the links I tried a few different times to post a link and haven't got one to work yet. Attached is an image of what the cable I was using looks like. It is crossed, correct?

The link to the cable I am planning on ordering is called a "high speed adsl cable" similar to what you are suggesting now... Picture below.

[dc42]

@feynman137 yes that cable in your photo is crossed.

Round twisted pair cables are best, such as https://www.amazon.com/Detroit-Packing-Co-Broadband-Telephone/dp/B088T7W124. But for a short cable it doesn't really matter, as long as it is wired straight through.

[Feynman137]

@dc42 Thanks for the help man, I just ordered this. Will be testing it out early this week!

[Feynman137]

@dc42 The cable did the trick sir. Thank you for your advice!