Flysky fs i6 firmware upgrade4/6/2024 The C2 command is sent before copying byte, to ask if we can send the next kB (1024 bytes) of data. N n-1 checksum (0xFFFF minus the sum of all the bytes of the frame) (2 bytes)įrame sent by the TX: it’s the same principle, except that there’s an additionnal 0x55 byte at the begining of the frame.Ĭ2: ask to write bytes – location,Įxample: 11 00 C2 00 18 00 09 00 00 00 00 00 00 00 00 0B FFĬ3: write bytes – location,data_block_size … parameters of the command, grouped by 2 bytes I used my logic analyzer to sniff the whole data transfer process, from this capture I understood how the protocol was working.įirst thing it does is sending a « ping » request, wich is answered by the transmitter. We know that the updater is using a serial com port to flash the firmware into the TX flash memory. Today I’ll show you how the official FlySky updater works, and try to do mine! Hi everyone! Today the train workers are in strike, so I can’t go to college, so I have plenty of time to release the product of my work!īut first thing first, a little bit of explanation. !\ This updater is unstable, see there for the newer version /!\
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