Silly question...

[zipzit]

Can I use an ESP32 with its native TWAI controller to perform read only tasks from the message stream without additional hardware? (e.g. withOUT an external transceiver) ?

3.4.12 TWAI® Controller
ESP32-S2 family has a TWAI® controller with the following features:
• compatible with ISO 11898-1 protocol (CAN Specification 2.0)
• standard frame format (11-bit ID) and extended frame format (29-bit ID)
• bit rates from 1 Kbit/s to 1 Mbit/s
• multiple modes of operation: Normal, Listen Only, and Self-Test
• 64-byte receive FIFO
• special transmissions: single-shot transmissions and self reception
• acceptance filter (single and dual filter modes)
• error detection and handling: error counters, configurable error interrupt threshold, error code capture,
arbitration lost capture

I'm toying with an idea, that simply checks for vehicle speed. Nothing else... Intended target is 2021/2022 model year Ford product.