DS18B20 using ROM ID

[ahmed_salah]

i am trying to read ds18b20 using rom id but i got 0.6 reading even if i replace the sensor with another one i do not know why attached is the code

[Acetronics2]

Hi, Ahmed

I placed one of MY read command lines ( commented ) close to yours ...

' OWOut DQ, 1, [$55, FAM, ID[6],ID[5],ID[4],ID[3],ID[2],ID[1], CRC, $44 ]	
  OWOut DQ, 1, [$55, $28,  $D3,  $60,  $F6,  $01,  $00,  $00,  $00, $41 ,$44]        	    ' Start temperature conversion Sensor 1

see any difference ??? ...

Alain

[ahmed_salah]

hi,
thanks for fast replay so u want me to replace my line with what u sent or to add it
i wnat to be sure from something

DS18B20 rom id $28, $D3, $60, $F6, $01, $00, $00, $41, $4E
so
FAM = $28
ID1 = $D3
ID2 = $60
ID2 = $F6
ID3 = $01
ID4 = $00
ID5 = $00
ID6 = $41
CRC = $4E


'

[Acetronics2]

.
.
.
ID2 = $60
ID2 = $F6
.
.
.

one of them is not the right one ... obviously

you have a 14 characters ID Number ... and Maxim chips only have ... a 12 Characters ID Number !!!

can't help you further ...

Alain

[ahmed_salah]

yes ,
you r right this all the code which i got when issue OWOUT DQ, 1, [$33] command
so this id include device manufacture and crc

[ahmed_salah]

this what i got when issue command OWOUT DQ, 1, [$33]
$28, $D3, $60, $F6, $01, $00, $00, $41

$28 is the FAM as i think
$41 is the CRC