Broadband-Hamnet™ Forum :: General
Board Index Latest Posts Welcome Guest   [Register]  [Login]
 Subject :Interface with Dallas 1820 Temperature Sensor.. 2012-12-27- 17:37:56 
VA3EAM
Member
Joined: 2012-10-18- 06:39:28
Posts: 5
Location: FN03nw, Oshawa, Ontario

I am wondering if anyone out there has done any experimenting with or have a solution for adding the Dallas Semiconductor DS1820 Temperature sensor to one of the serial ports on the WRT and written software to go with it to display the temperature on the node.  Here is a pdf datasheet for the 1820; datasheets.maximintegrated.com/en/ds/DS18S20.pdf


I would like to have the ability to monitor the temperature in the enclosure when it is placed up on the mast.


Thanks, Eric.
IP Logged
Email address is va3eam@gmail.com
 Subject :Re:Interface with Dallas 1820 Temperature Sensor.. 2012-12-28- 06:58:19 
K5KTF
Admin
Joined: 2010-01-18- 23:04:04
Posts: 266
Location: 5' from this webserver
  

A quick google search "wrt54g temperature sensor" reveals this:

http://www.lecad.fs.uni-lj.si/~leon/other/wlan/wrt54ow/

Looks like a simple way to interface, and I am adding it to my list of things to add to mesh nodes.


Have a Happy New Year !

Jim

K5KTF
IP Logged
B-) Jim K5KTF EM10bm Cedar Park, TX :star:
 Subject :Re:Interface with Dallas 1820 Temperature Sensor.. 2012-12-28- 07:07:04 
VA3EAM
Member
Joined: 2012-10-18- 06:39:28
Posts: 5
Location: FN03nw, Oshawa, Ontario
And of course that was one google search I didn't make. That is exactly what I was looking for. Going to have to doing some playing around with that! Thanks Jim and Happy New Year to you as well! Eric, VA3EAM.
IP Logged
Email address is va3eam@gmail.com
 Subject :Re:Interface with Dallas 1820 Temperature Sensor.. 2012-12-29- 03:54:28 
K5KTF
Admin
Joined: 2010-01-18- 23:04:04
Posts: 266
Location: 5' from this webserver
  

Let me know how the project turns out. Its looks simple enough on that site.

We are always looking for new ways and things to use on the mesh.

I have played with the Dallas Semi iButtons before, and even have an RS232 interface I built for a work project years ago (my design turned into a few thousand for inclusion into a product we made).

DS used to have a myriad of the 1-wire iButtons, in fact I still have one on my keyring, an ibutton that has a small amount of memory that has a txt file on it that reads "JAMES KINTER - PC SYS MAN", my old title (PC Systems Manager).

At the time, there wasnt much linux to have their software run on, so it was all Windoze based, but I bet I still have a copy of it somewhere.



73!
KTF
IP Logged
Last Edited On: 2012-12-29- 04:01:13 By K5KTF for the Reason
B-) Jim K5KTF EM10bm Cedar Park, TX :star:
 Subject :Re:Interface with Dallas 1820 Temperature Sensor.. 2012-12-31- 03:29:43 
VA3EAM
Member
Joined: 2012-10-18- 06:39:28
Posts: 5
Location: FN03nw, Oshawa, Ontario
Hi Jim. I found these on the Raspberry Pi website where a fellow is building an HVAC thermostat. Might work well in the WRT54G. http://www.ebay.ca/itm/DS18B20-temperature-measurement-sensor-module-/140837350708?pt=LH_DefaultDomain_0&hash=item20ca8f6d34#ht_1247wt_952 Eric.
IP Logged
Email address is va3eam@gmail.com
 Subject :Re:Interface with Dallas 1820 Temperature Sensor.. 2013-01-02- 05:30:46 
kc0alc
Member
Joined: 2011-12-12- 17:15:26
Posts: 4
Location: Iowa
 

I've been (slowly) working on a temperature/voltage sensor based on the Dallas DS2438 IC.  The DS2438 is a battery management IC that can read voltage as well as temperature; that way you could also monitor the voltage present at the router.

Using the digitemp software package, which is compiled for the WRT routers already, it should be fairly easy to put the voltage and temperature readings on one of the status webpages, even keep a log of the internal temperature of the case at a regular interval.

Eventually the plan is to have a PCB spun that plugs directly into the TTL-RS232 header of the WRT54 routers and incorporates the one-wire interface and DS2438 IC all on one daughtercard.


http://datasheets.maximintegrated.com/en/ds/DS2438.pdf

http://www.digitemp.com/

http://www.lecad.fs.uni-lj.si/~leon/other/wlan/wrt54ow/
IP Logged
Page # 


Powered by ccBoard


SPONSORED AD: