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meatpiHQ / wican-fw

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No RX when TX published to MQTT #121

Closed edlucky1 closed 6 months ago

edlucky1 commented 7 months ago

I am trying to read the odometer for a Hyundai Sonata. I was able to read with Car Scanner and captured these in MQTT Explorer:

{"bus":"0","type":"tx","ts":53619,"frame":[{"id":2015,"dlc":8,"rtr":false,"extd":false,"data":[2,1,166,170,170,170,170,170]}]}

{"bus":"0","type":"rx","ts":53625,"frame":[{"id":2024,"dlc":8,"rtr":false,"extd":false,"data":[6,65,166,0,20,164,202,170]}]}

I published the TX line to the wican/xxxxxxxxxx/can/tx topic in MQTT but never see RX response.

Settings:

image

I also tried to get Engine Speed (it seemed more straight forward, not sure that my expression is correct for Odometer). Frames captured in MQTT:

{"bus":"0","type":"tx","ts":25061,"frame":[{"id":2015,"dlc":8,"rtr":false,"extd":false,"data":[2,1,12,170,170,170,170,170]}]}

{"bus":"0","type":"rx","ts":25069,"frame":[{"id":2024,"dlc":8,"rtr":false,"extd":false,"data":[4,65,12,10,120,170,170,170]}]}

Same result, TX shows but no RX. I have read through a lot of the discussion and not sure where to look next.

meatpiHQ commented 6 months ago

@edlucky1 Please change the index to 2 in both filters. The index refers to PID index, that's byte 2.

meatpiHQ commented 6 months ago

This was not mentioned in the documentation. I have added it now.

https://github.com/meatpiHQ/wican-fw/tree/main?tab=readme-ov-file#7-can-to-json-interpreter---filtring

edlucky1 commented 6 months ago

That fixed it, thanks!

On to the next piece of the puzzle...