Send more than 8 bit message in CAN protocol

In the Controller Area Network (CAN) protocol, the maximum number of data bytes that can be transmitted in a single message is 8. This is because the CAN protocol uses a standardized message frame that includes a number of fields for identifying the message and transmitting data, and there is only space for 8 data bytes in the frame.
However, if you need to send more than 8 bytes of data in a single message, there are a few options you can consider:

1. Use multiple messages: You can divide your data into smaller chunks and send each chunk in a separate message. This will allow you to transmit more than 8 bytes of data, but it will also require more processing time and increase the overall number of messages on the network.
2. Use a higher-level protocol: If you are using CAN as the underlying communication protocol, you can layer a higher-level protocol on top of it to support the transmission of larger data payloads. For example, you could use the CANopen protocol, which provides additional functionality such as segmented data transfer and expedited data transfer for larger messages.
3. Use a different communication protocol: If the 8-byte limit of the CAN protocol is a significant limitation for your application, you may want to consider using a different communication protocol that supports the transmission of larger data payloads. Options might include Ethernet, Serial Peripheral Interface (SPI), or Universal Serial Bus (USB).

Regardless of which approach you to choose, it is important to carefully consider the trade-offs involved in transmitting larger data payloads, such as increased processing time, bandwidth usage, and the potential for increased error rates.