[mh] One Wire sensors

Several years ago, I ordered a serial to RJ11 adapter from
ibutton(something), called the link 12, and a few temperature sensors that
look like the standard TO-92 transistor package. I connected it to MH,
added one sensor to the network and tried to see if it worked. I had plans
to place sensors all around the house.

However, I hadn't ever seen any response from the serial port and shelved
the project. I decided to look at it again yesterday and discovered how it
worked... sort of:


f=First     \=Snif
n=Next      |=Thru
r=Reset     l=Level
b=Byt(NN+)  ^=57600
j=Bit(N+)   `=38400
p=BytW/P    ,=19200
~=BitW/P    x=BusLo
d=Aux+      $=Scan
z=Aux-      *=List
&=Aux?      h=Help
(=Extend
t=Type      "=Iso


420008003BE45B10
!,420008003BE45B10

I found that at 9600 baud I can press h to see the help, and *, $ will also
return data about the sensor that I have on the network. Wow! I finally
have something to work with, but I can't figure out where to get the
readings from. Pressing p, j or b all give a 1. One time I saw a B3, but it
doesn't seem to be repeatable. It's 179 anyway... my server room rack
better not be that temperature!!

So, I continued and looked for some MH code to read the serial port data. I
found several examples, but none of them seemed to be for reading the OW
data directly from a serial port. All seemed to read a dump from an
external program - and all from Windows. I'm running Linux.

So, I looked a owfs: installed it, configured it the best that I could
figure out and poked around the /run/owfs filesystem...

root@avalanche:~# cat /run/owfs/bus.0/10.67C6697351FF/latesttemp
43.1086root@avalanche:~# cat /run/owfs/bus.0/10.67C6697351FF/latesttemp
91.3275root@avalanche:~# cat /run/owfs/bus.0/10.67C6697351FF/latesttemp
14.4802root@avalanche:~# cat /run/owfs/bus.0/10.67C6697351FF/latesttemp
94.4001root@avalanche:~# cat /run/owfs/bus.0/10.67C6697351FF/latesttemp
46.0749root@avalanche:~# cat /run/owfs/bus.0/10.67C6697351FF/latesttemp
90.8667root@avalanche:~# cat /run/owfs/bus.0/10.67C6697351FF/temperature
36.8015root@avalanche:~# cat /run/owfs/bus.0/10.67C6697351FF/temperature
1.73821root@avalanche:~# cat /run/owfs/bus.0/10.67C6697351FF/temperature
31.6712root@avalanche:~# cat /run/owfs/bus.0/10.67C6697351FF/temperature
65.0987root@avalanche:~# cat /run/owfs/bus.0/10.67C6697351FF/temperature
27.7991root@avalanche:~# cat /run/owfs/bus.0/10.67C6697351FF/temperature

Every time I checked values, it was something different. Perhaps this is
because I twisted the sensors onto the wires, instead of a more secure
connection?

Either way, I'm getting SOMETHING... so I think it's time to ask: how do
YOU gather OW data? Is there a module for MH to tread it directly, or
should we use something external?

Thank you all!

-- 

Best regards,
Steve Switzer

---
Get world-class business I.T. services and a phone system with awesome
features that won't challenge your budget!http://www.sbsROC.com

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