CAN bus node for Hyundai Ioniq motor CAN

• receives message from CAN
• calculates energy values from the measured voltage and current
• sends some data via serial interface

Features:

• listen to Hyundai Ioniqs motor CAN bus with 500kBaud
• extracting specific CAN signals
• accumulating energy, based on voltage and current
• store accumulated values non-volatile, triggered by timeout of the BMS message
• output the data to serial line as pairs of names and values
• Battery live data: U, I, P, SOC, BatteryMaxTemp
• Cumulated data: ECharge, EDrive
• Vehicle data: speed, ODO
• Device Statistics: Uptime, EepromWriteCounter
• calculate Ri (based on voltage variation due to current jumps), collect and serial report Ri in list

Hardware

ATMega32, MCP2515 CAN controller via SPI, MCP2551 CAN transceiver

Change Log:

2022-08-30

• newly created (based on ESP32 arduino code and hausbus project)

2022-08-31

• added Ri calculation

2022-11-06

• collected all lib files in the main directory, to have a complete bundle
• added to github.com/uhi22/IoniqMotorCAN

Todo

• There are some cases, where the EEPROM write is interrupted by power-loss. Solve the dataloss, e.g. by maintaining redundant blocks, where always one instance is present, no matter when the power-loss happens.
• Calculate the integral over the dissipated power over the Ri
• Calculate the Ri also in case of limited available power