Matrix Orbital LK204-24-USB - Manual (Page 32)

Table 18: 1-Wire Error Codes
Code Description
0x00 Success
0x01 Unknown 1-Wire command
0x02 No devices on the bus
0x03 Fatal search error
6.4.2 Search command (254 C8 2)
This is used to find the addresses of all 1-Wire devices on the bus. After this command the display will
return one or more “Display return protocol” packets containing either an error code or addresses of 1-wire
packets. The structure of these packets is shown in the Table below.
Table 19: Search Return Packet
Offset
(Bytes)
Length
(Bytes)
Description
0 2 0x232A - Preamble.
2 1 0x8A - Packet 10 bytes long, an-
other address will follow. 0x0A -
Packet is 10 bytes long, this is the
last address.
3 1 0x31 - 1-Wire Packet Type
4 1 Error Code (0x00 for success)
5 8 1-Wire Address
13 1 CRC8 - 0x00 means the last address
was valid.
7 Miscellaneous Commands
The commands listed in this chapter don’t readily fit in any of the other categories, or are used in more
than one category.
7.1 Command List
Some commands, marked with an “R”, may be "Remembered" to set new defaults that will be in effect
each time the unit is powered on.
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