Additional Header Information - Ebyte E52-400/900NW22S User Manual

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7.7 Additional header information

When the module receives data from other modules, additional frame header information will be added to the serial

port output data.
Frame header meaning:
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Frame type Data length
C1 03
C3 01
Frame type: C1 represents unicast frame, C2 represents multicast frame, C3 represents broadcast frame, C4
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represents anycast frame;
Data length: user data length, maximum value 200 bytes;
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Network identification code: Different networks have different network identification codes. This information

can be used to know which network the source is;
Address: Specifies the source and destination of data;
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User data: User data area, maximum 200 bytes.
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The address and network identification in the data frame header are low-order first, such as network identification
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34 12, which should actually be 0x1234, making it easier to use the structure to parse it.
The data frame header can be turned off through the "AT+HEAD=0" command.
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Figure 7.6.1 Routing table
Network ID Initial address
34 12
34 12
8E 6C
AA 71
24
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E52-400/900NW22S User Manual
Target address
28 64
28 64
User data
01 02 03
AA