Add TWAI transmit example #8360
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Example showing how to transmit messages using the TWAI interface and a CAN transceiver.
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@designer2k2 - Thank you for the example! |
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Description of Change
Example showing how to transmit messages using the TWAI interface and a CAN transceiver.
It also uses the alerts to show how to set them up and react to them.
This is based on the receive example, adopted with the example from the api-reference for transmission: https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/peripherals/twai.html#message-transmission
Tests scenarios
I used an esp32-c3-devkit (ESP32-D0WDQ6) with a SN65HVD230 CAN transceiver.
This was attached between 2 Arduino Nano´s with a MCP2515/MCP2562 CAN interface, whereby they replayed a recording from a quite busy CAN bus.
The ESP32 is used to additionally transmit messages with this example into the bus and the output was observed.
Caution, when only another ESP32 is used to receive by the TWAI receive example the TWAI_MODE_LISTEN_ONLY has to be replaced with TWAI_MODE_NORMAL, otherwise there is no confirmation and the transmit example will fail.
Related links
The TWAI receive example: #7430