Ebyte E810-DTU User Manual page 18

Chengdu Ebyte Electronic Technology Co.,LTD
88h 11h
Below is the standard frame，frame ID is 0x789，5 bytes valid data format（12h,34h,56h,78h,90h).
05h 00h 00h
Please note：every frame contains 13 bytes，add 0 if bytes are not enough, otherwise, communication may fail.
For example：
CAN message converts to frames in UART
1.
CAN transmits：
Frame format：extension frames
Frame type：data frames
ID ：0x12345678
Data ：AAh BBh CCh DDh EEh
Frames in UART receives：85 12 34 56 78 AA BB CC DD EE 00 00 00
0x85 indicates that the frame format is an extended frame, the frame type is a data frame, and the data length is 5
The last four digits indicate that the CAN ID is 12345678.
The last 8 bits are the data area, the effective length is 5, and the remaining bits are filled with 0, as shown below,
Frames in UART converts to CAN message
2.
Frames in UART transmit：05 00 00 06 78 12 34 56 78 90 00 00 00
0x05 indicates that the frame format is a standard frame, the frame type is a data frame, and the data length is 5.
00 00 06 78 indicates ID is 0678
12 34 56 78 90 00 00 00 is data field，valid length is 5，as shown below：
Copyright ©2012–2019，Chengdu Ebyte Electronic Technology Co., Ltd.
22h 33h 44h 11h
07h 89h 12h
22h 33h 44h
34h 56h 78h 90h
：
:
E810-DTU(CAN-RS485) User Manual
55h 66h 77h 88h
00h 00h 00h
18