Travel

TO DO

• Check tire pressure
• Remove luggage rack
• Mount bike rack

• Charge batteries for BT keyboard
• Charge battery in emergency phone
• Charge HT batteries

Garmin - load pocket queries

Hacking

• SenseCAP Indicator and cables
• Seeed CANBUS adapter
• Hookup Grove to CANBUS
• OBD-II to CANBUS

• Laptop and charger
• Laptop adapter (USB)
• Comp notebook
• USB3 hub
• 5V supply

• M5StickC with micropython and PIR hat
• M5 Atom Echo speaker
• 3 x USB-C cables

Raspberry Pi

• Pi 4
• 4" monitor
• Logitech KBD and mouse and USB dongle

• USB3 drive

Tools

• screwdrivers
• needle nose pliers
• small cutters
• red voltmeter
• usual tool kit in bag, screwdrivers, torx drivers, usb cables

CAN Bus

I got an OBD-2 extension cable with 90 degree ends to make a low profile connection. I cut the cable in half. (Photo!) Now I have a connector with a 12" cable ready to use.

Termination

https://electronics.stackexchange.com/questions/470382/can-bus-termination-resistors-for-can-logger-device

I don't need termination as long as my cable is less than 0.5m long. (It was 18" but I snipped it down to be on the safe side.)

OBD2 pinouts

Signals

Signals that matter to me, and the wire colors:

5 signal ground -- orange

6 CANH -- Black

14 CANL -- Green

16 12V always on -- Brown

MCP2515

Seeed Xiao

I intend trying this one first because it's got a more commonly used chip on it.

https://www.14core.com/wiring-the-mcp2515-shield-with-obd-on-arduino/ connector info

https://www.14core.com/wiring-the-mcp2515-controller-area-network-can-bus-diagnostics/

https://github.com/kvba1/ESP32-MCP2515-OBD2-CANBUS ESP32 + MC2515

https://github.com/yogiD/MCP2515-OBD Arduino + MCP2515

GD32E103CA

Seed + Grove from Longan Labs https://github.com/Longan-Labs/Serial_CAN_FD_Module

Resources

https://copperhilltech.com/ Pi and Arduino boards for CAN bus, OBD-2, NMEA, etc