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Start DelimiterLength of Frame DataFrame DataChecksum
0x7EMSBLSB 0xFF - (SUM(All Frame Data Bytes) % 256)

Except for the start delimiter, the following substitutions must be made before sending:

Raw ByteReplacement Bytes
0x7E0x7D 0x5E
0x7D0x7D 0x5D
0x110x7D 0x31
0x130x7D 0x33

Note that the first byte is the escape character 0x7D and the second is the original byte XOR'd with 0x20.

Supported Frames : Messages from Host to OpenMote