Foxtech SYK-30 User Manual page 12

4.Pass-Through protocol
The pass-through transmission protocol is a one-way serial port " pass-through
protocol" that is input from the external serial port of the YAW board, and the
external output of the PITCH board, which is generally used for the customer's
custom control of the camera core. It requires the customer to package the
messages that need to be transmitted to the camera core before they are sent. The
format of a packet is as follow.
（The following numbers are hexadecimal）
EF XX 00
Fra bytes to Fixe
me be d
hea transmitt val
d ed, ue
maximu
m 62
bytes
examples：
1、Need to pass-through：81 01 04 07 26 ff，daylight zoom，then：
EF 06 00 04 02 d0 81 01 04 07 26 ff 01 b2，Bytes 6，Checksum：
0x81+0x01+0x04+0x07+0x26+0xff = 0x1b2 。
2、Need to pass-through：f8 00 12 02 08 00 00 1c，IR pseudo color，then：
EF 08 00 04 02 d0 f8 00 12 02 08 00 00 1c 01 30 Bytes 8，Checksum：
0xf8+0x12+0x02+0x08+0x1c = 0x1b2 。
3、Zoom pass-through query：EF 05 00 04 02 d0 81 09 04 47 FF 01 d4 feedback
example：90 50 03 0D 0F 01 FF
4、focus pass-through query：EF 05 00 04 02 d0 81 09 04 48 FF 01 d5 feedback
example：90 50 07 0C 01 0C FF
Dual vision camera core serial port function
Note ： The following functions need to be implemented through the
pass-through transmission protocol, and some functions are already available
on the gimbal protocol
Pseudo color：
Iron red：
amber：
White-hot：
04 02 D0 XX
Fixe Fixe Fixe bytes to
d d d be
val val val transmit
ue ue ue ted 1
f8 00 12 02 00 00 00 14
f8 00 12 02 01 00 00 15
f8 00 12 02 08 00 00 1c
12
XX XX O1
bytes to bytes to Checks
be be um
transmit transmit high
ted 1 ted n positio
n
O2
Checks
um low
positio
n