Matrix Orbital DD-DB1 LCD/VFD Dev Board - Manual (Page 28)

5. Dallas 1-Wire
5.1.Search for a
1-Wire Device
Dec
Hex
254 200 2
FE C8 02
Sends a search query to all of the up to 32 devices on the one wire bus. Any connected device will respond with a
identification packet.
Response 14 bytes, identification packet as shown below
Offset Length Value Description
0 2 9002 Preamble
2 1 138 Another device packet will follow OR
10 Last device packet
3 1 49 Packet Type
4 1 0 Error Code (0 indicates success)
5 8 Device Address
13 1 0 CRC8 address check (0 indicates validity)
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