steppedMermaid(step, `
sequenceDiagram
autonumber
participant ECU1
participant ECU2
%% step %%
ECU1->>ECU2: Single Frame (03 04 00 57)
Note left of ECU1: It is a single frame because
Note left of ECU1: the First Hex digit in the first byte is equal 0.
%% step %%
loop Processing Single Frame
ECU2->>ECU2: No Need to send a Flow Control Frame.
end
%% step %%
ECU1-->>ECU2: First Frame (13 69 xx xx xx xx xx)
Note left of ECU1: It is a first frame because
Note left of ECU1: the First Hex digit in the first byte is equal 0.
Note left of ECU1: and the number of bytes to be sent is 0x369 = 617 bytes.
%% step %%
ECU2->>ECU1: Flow Control (30 00 78)
%% step %%
Bob-->>John: Jolly good!
`)