; ============================================================================
; CAN IO Board — Seeed Studio XIAO ESP32-S3
;
; 4 optocoupler inputs, 2 relay outputs (darlington), SN65HVD230 CAN
; transceiver on the ESP32-S3's built-in TWAI controller.
;
; Build:    pio run
; Upload:   pio run -t upload        (XIAO connected over USB)
; Monitor:  pio device monitor       (log output over native USB CDC)
; ============================================================================

[env:seeed_xiao_esp32s3]
platform = espressif32
board = seeed_xiao_esp32s3
framework = arduino

monitor_speed = 115200

build_flags =
    ; Route Serial to the native USB CDC port. These are already the board
    ; defaults for the XIAO ESP32-S3, kept explicit for clarity: it frees
    ; UART0's pins (GPIO43/44) for use as Digital out 1/2.
    -DARDUINO_USB_CDC_ON_BOOT=1
    -DARDUINO_USB_MODE=1