DNThomas

I have a transceiver attached (SN65HVD230). When plugged into a vehicle CAN bus, the lib performs as expected. When unplugged from the vehicle , it still hangs at the CAN.endPacket();...

Had the exact same issue. Just hacked up a bare ESP32 dev module with a transceiver IC and could connect with the same repeating "Got data from serial. Len =...

The data in your Device Console are not standard LAWICEL formatted serial frames. In the LAWICEL format, your frames should start with either "54" (T) or "74" (t) denoting an...

... and slap me for being daft .. tried with the latest QT6 dev build and it shows them fine :) 

Sorry for not including the link. Here is the manual for the original Lawicel CANUSB dongle. [https://www.canusb.com/files/canusb_manual.pdf](url) It details the ASCII frame format on Page 7 onwards.