BoardPilotSN65HVD230 CAN transceiver (3.3 V) with ESP32
Supply 3.3 V
Bus GPIO
Pins and ESP32 wiring
| Pin | Role | ESP32 pin | Notes |
|---|---|---|---|
| 3V3 | Power | 3V3 | |
| GND | Ground | GND | |
| CTX | Input (the ESP32 drives it) | D25 | Transmit data in. Connect to the ESP32 TWAI TX pin |
| CRX | Output (the part drives it) | D26 | Receive data out. Connect to the ESP32 TWAI RX pin |
| CANH | Not wired to the ESP32 | — | CAN high. To the bus, never to the ESP32 |
| CANL | Not wired to the ESP32 | — | CAN low. To the bus, never to the ESP32 |
Suggested wiring for the 30-pin ESP32 DevKit, avoiding flash, input-only and strapping pins. BoardPilot checks it for you as you wire.
Sources
- Texas Instruments SN65HVD230 datasheet, Supply 3 to 3.6 V; D (TX in), R (RX out), CANH, CANL
- Espressif ESP32 Technical Reference Manual, TWAI controller needs an external transceiver
Try it in 3D in BoardPilot
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Part data: CC BY 4.0, free to reuse with credit to BoardPilot.