Interacting/Scan CAN messages ELM327


hi everyone,
being expert can bus, trying hack elm327 using following hardware:

elm327 - bluetooh hc-05 - arduino uno

unfortunately, have trouble reading/scannning can messages.
when set eml327, seems fine (i can read 'ok' after every @ command), when try scan using atma device stop working after 2-3 can messages....moreover error not same.

according me setting of device wrong.

i appreciate can fix code or advice other avenues.



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