The cable
(rough notes for now)
An Android phone or tablet with On-The-Go (OTG) also known as USB Host mode support.
Most modern Androids with a USB-C connector will work.
A CANable (US$20) CAN-BUS to USB adapter.
These can be found on sites such as
AliExpress,
Amazon,
eBay or
makerbase3d.com. Search for CANable 2.0.

A EURO5 6pin plug (US$3). Connect CAN-H, CAN-L and Ground wires to the CANable.
These plugs can be found prewired in places such as
AliExpress,
Amazon or
eBay. Search for MWTPB-06-1A-R
DONT LET THE OTHER THREE WIRES SHORTOUT.Either put heatshrink over the end of each of the unused wires or cut them at different lengths and wrap with electrical tape.
Here are two different ones that I use.
Note: Both have heatshrink on the unused wires and then wrapped in cable harness tape for neatness.
Makerbase CANable 2.0 Pro
FYSETC UCAN