# (Linux) Vehicle to Home Charger Hacking

🚀 GitHub Repo

https://github.com/rand12345/BeagleBone-V2H

Nissan Leaf domestic bi-directional charger - DALL·E 3

# 🌟 Project Overview

The BeagleBone-V2H project focused on the reverse engineering and experimentation of an Indra Vehicle to Grid (V2G) bi-directional charging system. The aim was to replicate the functionality of the existing system with local control only. This involved building a completely new BeagleBone firmware image, writing custom kernel overlays for hardware support, and developing a bespoke application in Rust. Additionally, a SvelteKit webUI was prototyped to provide local user control through a websockets interface. Upon completing a proof of concept, a load matching Vehicle to Home (V2H) feature was added so that the connected electric vehicle could safely power an entire home and charge from excess solar automatically.

# 🔑 Stages

🔧 Reverse Engineering Commercial CHAdeMO V2G System:

Dumped eMMC image of existing firmware, extracted configs, and decompiled main executable
Ghidra for reverse engineering existing C++ CHAdeMO V2G firmware
Extracted boot and runtime logs through TTL UART

🛠 Implementing Peripherals and Drivers:

Retained access to hardware components using bespoke Linux kernel overlays
Designed custom libraries for EV DC rapid charging CHAdeMO CAN, PRE 6kW bi-directional CAN charger, STMicro STPM3x SPI energy monitor, Analog Devices AD7237 SPI ADC, and Philips PCA95xx I2C GPIO extender

- 💡 Designing Replacement Application:

🔬 Experimenting with CCS Adaption:

Developed a ground-up replacement application in Rust with the aim of cloud disconnection and local control only.

Conducted experiments on adapting the CHAdeMO interface using pyPLC to enable CCS for EV charging using GreenPHY for protocol communication.

# 🛠️ Technical Stack

💻 Programming and Runtime:

Rust with Tokio async runtime.
SQLx for database interactions.
Async SocketCAN for CAN network communication.
I2C and SPI for interfacing with STMicro energy monitor, Analog Devices ADC, and Philips GPIO panel interface.
Tokio Tungstenite websocket API.
SvelteKit web interface.

📊 Database Management:

🔌 Hardware Platform:

💻 Operating System:

SQLite3 for local events recording and datalogging.
JSON based charging/discharging scheduler.

Existing BeagleBone Green - Texas Instruments (Ti) System-on-Chip (SoC).

Linux Debian 10 - SD boot.