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CAS100 flows

The CAS100 protocol involves a sender and a receiver. Both sides are defined in advance, and do not exchange roles during transfer.

Initiate the connection

The CAS100 initiation flow is more complete than the CAS40 and CAS50 variants:

        sequenceDiagram
    Participant sender as Sender
    Participant receiver as Receiver

    sender->>receiver: Send a 0x16 (START)
    receiver->>sender: Send a 0x13 (ESTABLISHED)

    sender->>receiver: Send an MDL1 header (0x3A)
    receiver->>sender: Answer with an MDL1 header (0x3A)
    sender->>receiver: Acknowledge (0x06)
    receiver->>sender: Acknowledge (0x06)
    

Note

On cross-variant CASIOLINK reception, since the MDL1 header is received in the place any other data would be received in the CAS40 and CAS50 variants, the MDL1 header and acknowledgement reactions must be managed in the data reception utilities rather than in the communication initialization.

However, when the CAS100 variant is selected explicitely by the user, the MDL1 header can and should be managed in the communication initialization directly, so that device information can be exploited.

See the following for more information:

• CAS100 packet format;

• MDL1 headers.

Send data

Todo

Write this!