# MangOH Red WP7607 - CAN-bus RX packets error rate too high

**URL:** <https://mangoh.discourse.group/t/mangoh-red-wp7607-can-bus-rx-packets-error-rate-too-high/2266>\
**Category:** mangOH Red\
**Created:** [December 25, 2018, 9:46am UTC](https://mangoh.discourse.group/t/mangoh-red-wp7607-can-bus-rx-packets-error-rate-too-high/2266 "2018-12-25T09:46:14Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![JasonChou](https://avatars.discourse-cdn.com/v4/letter/j/6f9a4e/32.png) [@JasonChou](https://mangoh.discourse.group/u/JasonChou)\
**Post date:** [December 25, 2018, 9:46am UTC](https://mangoh.discourse.group/t/mangoh-red-wp7607-can-bus-rx-packets-error-rate-too-high/2266/1 "2018-12-25T09:46:14Z")

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Hi,  
I got mangOH and Talon CAN IoT card ([https://mangoh.io/uploaded-documents/Buy/IoT%20Cards/CAN%20IoT%20Card/Talon-mangOH-CAN-Bus-Module-Brief-2018.pdf](https://mangoh.io/uploaded-documents/Buy/IoT%20Cards/CAN%20IoT%20Card/Talon-mangOH-CAN-Bus-Module-Brief-2018.pdf)) to connect and want to receive can frames from CAN traffic generator : SIMN2000-006: Au NMEA 2000 PowerTrain Simulator Engine Basic Plus Edition (1.00A)([https://www.auelectronics.com/products/system/simn2000/simn2000-006.html](https://www.auelectronics.com/products/system/simn2000/simn2000-006.html)).

I follow [CAN BUS on mangOH Red - simplified user experience](https://mangoh.discourse.group/t/can-bus-on-mangoh-red-simplified-user-experience/1631) and run start\_can.sh in mangOH. But I can’t see any RX packets in can0 using ifconfig command.

When I modify can bitrate from 125000 to 250000, RX packets can be received.

But the error packets also increases (about 22% of RX total packets).

Does anyone meet the same phenomenon?

If yes, how to solve this issue?

Thanks!!

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**Author:** ![Zahid](https://avatars.discourse-cdn.com/v4/letter/z/e79b87/32.png) [@Zahid](https://mangoh.discourse.group/u/Zahid)\
**Post date:** [December 31, 2018, 10:31pm UTC](https://mangoh.discourse.group/t/mangoh-red-wp7607-can-bus-rx-packets-error-rate-too-high/2266/2 "2018-12-31T22:31:06Z")

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Hi @JasonChou,  
I nor any other responses on the list seem to have had the problems that you mention. I have a  
couple of suggestions:

1. Please go through the Linux Kernel notes on socketCAN:  
[https://www.kernel.org/doc/Documentation/networking/can.txt](https://www.kernel.org/doc/Documentation/networking/can.txt)
2. Try setting up loopback on both the .125 Mbps & .25 Mbps and see where the plumbing is amiss.
3. Integrate in the [https://github.com/linux-can/can-utils](https://github.com/linux-can/can-utils) to allow you to troubleshoot further.
4. Integrate in [https://github.com/dschanoeh/socketcand](https://github.com/dschanoeh/socketcand) (this may be part of can-utils?).

I am assuming that you have already set up 2 nodes back-to-back and CAN communication over  
socketCAN worked in that case and then you moved to the traffic generator? If not please try that  
first. Let us all know your experience.

Zahid

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**Author:** ![caioporto](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/caioporto/32/1099_2.png) [@caioporto](https://mangoh.discourse.group/u/caioporto)\
**Post date:** [July 12, 2019, 9:39pm UTC](https://mangoh.discourse.group/t/mangoh-red-wp7607-can-bus-rx-packets-error-rate-too-high/2266/3 "2019-07-12T21:39:22Z")

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Hi @JasonChou,

I’m running into the same issue.  
I used to have a WP85XX and it was working very well, about 3% errors at 500Kbps.  
Right now I’m using a WP7702, because of the 4G, and the errors increased to 20% on average.  
I tried all different configurations to work around this issue, but I just couldn’t improve the numbers. Let me know if you found anything that solved that for you.

Thank you!  
Caio Porto