Awesome

A fork of ESP32RET by collin80 to add support for the ESP32-S3. It's a quick hack where serial Bluetooth is removed since the S3 only has BLE and no support for Classic Bluetooth. FastLED support is also commented out due to problems compiling with it included. Works straight off with RejsaCAN.

Info further down on this page is for the original code, so not all is correct for this fork

ESP32RET

Reverse Engineering Tool running on ESP32-S3 based hardware.

Requirements:

You will need the following to be able to compile the run this project:

Arduino IDE Tested on 1.8.13
Arduino-ESP32 - Allows for programming the ESP32 with the Arduino IDE
esp32_can - A unified CAN library that supports the built-in CAN plus MCP2515 and MCP2517FD
can_common - Common structures and functionality for CAN libraries

PLEASE NOTE: The Macchina A0 uses a WRover ESP32 module which includes PSRAM. But, do NOT use the WRover board in the Arduino IDE nor try to enable PSRAM. Doing so causes a fatal crash bug.

The EVTV board has no PSRAM anyway.

This program is larger than the default partitioning scheme. You will need to use a larger scheme. The recommended way to do this: Tools -> Partition Scheme -> Minimal SPIFFS

All libraries belong in %USERPROFILE%\Documents\Arduino\hardware\esp32\libraries (Windows) or ~/Arduino/hardware/esp32/libraries (Linux/Mac).

The canbus is supposed to be terminated on both ends of the bus. This should not be a problem as this firmware will be used to reverse engineer existing buses. However, do note that CAN buses should have a resistance from CAN_H to CAN_L of 60 ohms. This is affected by placing a 120 ohm resistor on both sides of the bus. If the bus resistance is not fairly close to 60 ohms then you may run into trouble.

The firmware is a work in progress. What works:

CAN0 / CAN1 reading and writing
Preferences are saved and loaded
Text console is active (configuration and CAN capture display)
Can connect as a GVRET device with SavvyCAN
LAWICEL support (somewhat tested. Still experimental)
Bluetooth works to create an ELM327 compatible interface (tested with Torque app)

What does not work:

Digital and Analog I/O

License:

This software is MIT licensed:

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.