Seplos BMS 48V CAN with Waveshare RS485 CAN HAT

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ds1707 asked Apr 24, '22

Seplos BMS 48V CAN with Waveshare RS485 CAN HAT

Hello community,

I have a question concerning the CAN communication between my RPI Running Venus 2.85 with the Waveshare RS485/CAN HAT connected via CANbus to my Seplos BMS.

Via "/data/VeCanSetup/setup"

I installed the #9 Waveshare CAN

can0 Waveshare Hat 12 MHz crystal
can1 Waveshare Hat 12 MHz crystal

The i see the CAn Bus in the Venus software

But i get the ERROR-Passive failure.
In the Seplos Software i choose "Victron under CAN Protiocol"
I have double checked the wiring and measured the wires but still the same isse.

Hope you can help me.

Thank you!

Best Regards,

Dominik

Venus OS Raspberry Pi VE.Can

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Modifications Space

Node Red Space

Answer 1 · 2022-04-24T13:36:28Z

ds1707 answered · Apr 24, 2022 at 01:36 PM

After playing with config there is still an error passive, but the SHEnergy and battery was added to Venus. So this can be closed.

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Answer 2 · 2022-04-24T15:43:15Z

bathnm answered · Apr 24, 2022 at 03:43 PM

Your "ERROR-Passive" might be down to the HAT not supplying data that is in the right format. I know there is a fix, and it might not be in VenusOS till 2.90.

If you can run the following command and share the output I can let you know if you are seeing the issues that is in the fix, or a new issue.

ip -json -details -statistics link show can0

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Answer 3 · 2022-05-13T01:39:37Z

micha854 answered · May 13, 2022 at 01:39 AM

same issue here with raspi 3B+ with venus OS and can bus from WAVESHARE

my output:

[{"ifindex":2,"ifname":"can0","flags":["NOARP","UP","LOWER_UP","ECHO"],"mtu":16,"qdisc":"pfifo_fast","operstate":"UP","linkmode":"DEFAULT","group":"default","txqlen":100,"link_type":"can","promiscuity":0,"min_mtu":0,"max_mtu":0,"linkinfo":{"info_kind":"can","info_data":{"state":"ERROR-ACTIVE","restart_ms":100,"bittiming":{"bitrate":500000,"sample_point":0.833,"tq":166,"prop_seg":4,"phase_seg1":5,"phase_seg2":2,"sjw":1},"bittiming_const":{"name":"mcp251x","tseg1":{"min":3,"max":16},"tseg2":{"min":2,"max":8},"sjw":{"min":1,"max":4},"brp":{"min":1,"max":64},"brp_inc":1},"clock":6000000},"info_xstats":{"restarts":0,"bus_error":0,"arbitration_lost":0,"error_warning":0,"error_passive":0,"bus_off":0}},"num_tx_queues":1,"num_rx_queues":1,"gso_max_size":65536,"gso_max_segs":65535,"stats64":{"rx":{"bytes":165635,"packets":23423,"errors":0,"dropped":0,"over_errors":0,"multicast":0},"tx":{"bytes":53534,"packets":6693,"errors":0,"dropped":0,"carrier_errors":0,"collisions":0}}}]

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bathnm commented · May 13, 2022 at 09:42 AM

@micha854 I can confirm that you hit a bug/issue in the GUI, which has now been fixed. It seems that some CAN controllers do not report berr_counters and that used a problem.

As @Vassilis Bourdakis has stated the fix is in the 2.90 beta releases.

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Answer 4 · 2022-05-13T09:23:37Z

vassilis-bourdakis answered · May 13, 2022 at 09:23 AM

had the same with my WAVESHARE HAT, mvader explained when I asked that this is OK and means that error checking (or something like that) is active, so nothing to worry.

BTW, CANBUS was indeed working!

Upgraded to 2.90-3 and now get full report of packets et al, so if you can upgrade to latest 2.90 you'll be pleasantly surprised!

V.

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bathnm commented · May 13, 2022 at 09:48 AM

Subtle difference between the two screens. The left hand does not report BERR counters so the TEC and BEC are --. The right hand does and displays the value.

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Answer 5 · 2022-05-13T09:55:31Z

micha854 answered · May 13, 2022 at 09:55 AM

Where is the new version 2.90 available? I can only find the 2.85 which the gx also shows me as the newest

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Answer 6 · 2022-05-13T09:58:45Z

bathnm answered · May 13, 2022 at 09:58 AM

It is not released yet, it is in Beta. You need to set your device to the "Latest release candidate" update feed to get beta software. Search the forums for releases notes.

While it fixes the network status display for CAN, it might break other things. So please read the releases notes related to beta software before using.

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Answer 7 · 2022-05-13T10:17:33Z

micha854 answered · May 13, 2022 at 10:17 AM

ah ok thanks, i have updated to v2.90-6 and show me the data od RX and TX. fine!

but on top of TEC and REC shows every N/A, thats normal?

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bathnm commented · May 13, 2022 at 11:13 AM

@micha854 if your can controller does not return any BER counters then yes.

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micha854 bathnm commented · May 13, 2022 at 08:09 PM

i dont now. work for me! thanks

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Answer 8 · 2022-10-21T08:57:00Z

ds1707 answered · Oct 21, 2022 at 08:57 AM

Is it possible to get more data out of the CAN and share them on mqtt?

For example Cell voltage of each cell and each pack?

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ds1707 commented · Oct 21, 2022 at 09:01 AM

Seplos told me all the data was shared via CAN, how can i add all the data to mqtt?

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