STM32F103 and MCP2515 CAN-bus module mockup for serial AIM stream => CAN bus data conversion.
v3 ECU firmware mods NOT needed (all the required signals are sent via AIM-stream, 1st or 2nd RS232, 2nd is more practical).
The fw of this module can be upgraded via serial port. (come back later for pointers).
NOTE: after the flash is erased (intentionally with SWD/JTAG interface, cannot happen accidentally), crypto is lost => VEMS fw cannot be uploaded (can still be used as a developer's prototyping board).
Depending on the CAN-ids and format required by the dash, specification of exact CAN-IDs might be needed, see CanBus wiki page