The ESP32 microcontroller does not only support a CAN 2.0 interface, there are also a lot of boards and especially some gaming handhelds out there which supports a nice display, some buttons and a mobile LiPo power supply - so why not make an easy to use CAN tester out of it?
That is what CAN-Spy is for
In the samples folder there are different implementations, like for the ESPlay Micro (which is out of the ODroid Go family)
Whenever you do some improvements or even an own design for another board, please send me a pull request to add it in here