ds1490 FOB usb one wire adapter issue

xyzzy

New Member
So I have this DS1490 2 in 1 USB FOB adapter plugged into the USB port on my rasperrypi. If I do not plug ANYTHING into it I can see it with the one wire file system. I try to plug a hobby-boards temp sensor into it with a "phone cable but as soon as I do I can no longer see the FOB...... so can someone tell me what Im doing wrong?? the FOB is a 6 pin connector and the Temp sensor is a RJ 45 8 pin connector but as far as I can see its only the center pins that mater so the phone cord should work. :(
 
DJ
 
There are two types of phone cords. One has the wires reversed from end to end. The other one called a data type did not reverse the connections between the connectors. You may want to verify the correct connections between them.
That could be your problem. If the signals and power are crossed end to end.
 
I know my Smarthome 1132B interface needed a data type when contented to a WGL V572 all house code transceiver.
 
Welcome to Cocoontech xyzzy.
 
Here is a little chart relating to the standards of 1-wire RJ-11, RJ-12 and RJ-45.
 
1-wirepins.jpg
 
Here is a nice document relating to an overview of 1-Wire stuff.
 
Personally here went with my own RJ-45 standard based on using two or three wires back in the early 2000's separating the networks based on 5VDC or 12VDC and initially using a star topology then later a hub and spoke star topology.
 
Utilizing a hodgepodge here of Temp05, Temp08, HB and Maxim hubs.
 
Relating to the RPi2 have one setup using a USB mini hub that utilizes 3 wire stereo mini audio plugs (3 wires). I cut the wires to utilize a combination temperature / humidity sensor.
 
e1dhwp1a.png

 
Another that is using the GPIO pins with a pull up resistor or using a DS-1307 mini RTC clock board with additional pins for 1-wire sensors (specifically used a DS-18A20).  The three pins on the top left are for a 1-wire sensor.  The board is around $1 on Ebay.  Its been a while here that I have purchased DS-18A20's in bulk for less than 1 penny apiece. 
 
ds1307-real-time-clock-module-from-tronixlabs-australia.jpg

 
 
 
The GPIO methodology is just a bit of bit banging and now sort of a standard along with the older standard of the Maxim to RS-232 to USB stuff.  Either way works fine today.
 
On the RPi2 I output the stuff for the 1-wire sensors in the same format whatever methodology I use to get data.
 
This stuff is from a POE connected RPi2 in the attic running Homeseer 3 automation software.  The device is doing Z-Wave plus (via GPIO card), X10 and UPB (via networked remote controllers).
 
Linux ICS-RPi2-Zee 4.1.13-v7+ #826 SMP PREEMPT Fri Nov 13 20:19:03 GMT 2015 armv7l
Last login: Thu Feb 18 01:31:48 2016 from 192.168.244.236
Uptime: 31 days 19 hours 44 minutes
CPU Speed: 900 Mhz - Load Average: 1min 25% 5min 27% 15min 28% - Cores: 4
Free Memory: 669 Mb
Free Disk Space rootfs: 7.1G
SD Card: Written 27782M Read 0G
Network Traffic eth0: Sent 682.3 MiB Received 1.2 GiB

 
 
~# cat temp
Feb 19 07:04:02 Sensor 0 C: 8.88 F: 47.97
Feb 19 07:04:03 Sensor 1 C: 8.19 F: 46.74 H: 71%

 
HS3-1wire.jpg
 
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