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qubolino commented
i am trying esp32_can/examples/CANTestESP32_BuiltIn/CANTestESP32_BuiltIn.ino with an esp32 and a transciever HVD230 plugged as such:
| CAN transceiver | ESP32 |
|---|---|
| 3V3 | 3V3 |
| GND | GND |
| CTX | GPIO_5 |
| CRX | GPIO_4 |
i don't see any frames sent on the bus... any hint?
qubolino commented
as a comparison i am able to see frames on the bus with the minimal example from https://github.com/sandeepmistry/arduino-CAN
collin80 commented
Yes, I made my library fairly early and I'm not sure if anyone had standardized which pins to use for CAN back then... And well, I chose different pins than everyone else. This is the definition in esp32_can:
ESP32CAN attribute((weak)) CAN0(GPIO_NUM_16, GPIO_NUM_17) ;
As you can see, I used pins 16 and 17 instead of 4 and 5.
qubolino commented
indeed... after changing this it works well. thanks!