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can_general_config_t g_config = CAN_GENERAL_CONFIG_DEFAULT(GPIO_NUM_5, GPIO_NUM_4, CAN_MODE_NO_ACK); ... message.flags = CAN_MSG_FLAG_EXTD | CAN_MSG_FLAG_SELF;
It shouldn't need to be activated. Which development board are you using? And is it a CP2102 or a CP2102N?boudewijn wrote: Does that chip need to be initiated on the ESP32-side? Can it be that such a chip is not active?