Rainbow Electronics 900 - Manual (Page 239)

FLYFOT-M260-MODULE
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19.7.5 Error manage
When received data checksum is error ,we should discard the firs three byte, Start pattern , Data length
and Data packet type, then find “0xAA” or “0xDD” to start the next data frame. If you do this action,
you will skip the error data frame and get next correct frame start byte that maybe “0xAA” or “0xDD”.
The high layer protocol will guarantee the error data to be resend.
19.7.6 Restriction
The autobauding mode is not available when the Multiplexing Mode is activated ：the serial link speed
must be set to a fixed rate.