BoardPilotTJA1050 CAN transceiver module (5 V) with ESP32
Supply 5 V
Bus GPIO
Pins and ESP32 wiring
| Pin | Role | ESP32 pin | Notes |
|---|---|---|---|
| VCC | Power | VIN | Needs 5 V: use VIN |
| 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, 5 V: use a divider before 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.
This module is sold for 5 V. Its outputs may be 5 V: use a level shifter or a voltage divider on ESP32 inputs.
Sources
- NXP TJA1050 datasheet, Supply 4.75 to 5.25 V; TXD in, RXD out, CANH, CANL
Try it in 3D in BoardPilot
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Part data: CC BY 4.0, free to reuse with credit to BoardPilot.