A LyraT v4.3 wired up to an ESP-less unfurl node. We redefine the JTAG pins as a CAN (TWAI) interface and connect them directly to the pads on the node board that are connected to the CAN bus transceiver.

The goal is to prototype an ESP-based “Audio Node” to replace the Beaglebone board for playing the creature sounds

MTDI (GPIO_12) → CAN_D (GPIO_5) MTDO (GPIO_14) → CAN_R (GPIO_4)

3.3V and GND come from the Lyra board

DIP switches 3, 4, 5, 6, 7 are in the ON position, and the SD card has to be in 1-wire mode.

A basic CAN example from ESP-IDF is being used to test it with an Entree CAN interface running the candlelight firmware.